CN113653522A - Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function - Google Patents
Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function Download PDFInfo
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- CN113653522A CN113653522A CN202111085731.7A CN202111085731A CN113653522A CN 113653522 A CN113653522 A CN 113653522A CN 202111085731 A CN202111085731 A CN 202111085731A CN 113653522 A CN113653522 A CN 113653522A
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- abdicating
- constant
- resistance
- self
- rod body
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 43
- 239000011435 rock Substances 0.000 title claims abstract description 38
- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-tapping yielding anchor rod capable of controlling large deformation of soft rock and having a displacement monitoring function, which comprises: the device comprises a hollow self-tapping threaded rod body, a high-strength nut, a constant-resistance abdicating component extrusion head, a micro electro mechanical system array data line fixing buckle, an outer side sleeve, a tray, a constant-resistance abdicating inner cylinder, a micro electro mechanical system accelerometer and a micro electro mechanical system array data line. The invention can realize the effects of soft rock anchoring, rock deformation energy release and six-direction freedom degree monitoring of the anchor rod.
Description
Technical Field
The invention relates to the technical field of rock and soil anchoring and engineering supporting, in particular to a self-tapping abdicating anchor rod capable of controlling large deformation of soft rock and having a displacement monitoring function.
Background
With the rapid development of engineering construction in China, geotechnical engineering faces more complicated geological conditions, such as surrounding rock deformation damage and geological disasters, such as large deformation of weak rock-soil bodies, collapse and roof fall of shallow-buried tunnel sections and the like when a tunnel passes through a soft rock stratum, and particularly the problems of large deformation of soft rock of tunnel sections with large buried depth and the like. The soft rock has the characteristics of low compressive strength, poor bearing capacity, small deformation modulus, obvious rheological effect, easy generation of large deformation and the like. The common anchor rod or anchor cable is usually broken due to the large deformation of the soft rock tunnel, which will cause very adverse effects on the construction and operation of the engineering.
At present, in the problem of large deformation of soft rock, support measures such as full-length grouting anchor rods and steel frames are generally adopted for hard resistance, however, the rheological effect of the soft rock is obvious, the deformation energy of the rock is gradually accumulated, the stress on a support structure is gradually increased in the operation period of a tunnel, and the risk of structural instability exists, so that the self-tapping yielding anchor rod provided by the invention has a larger yielding distance based on the support principle that the rock is deformed and is not fully deformed by the new Austrian method, the accumulated deformation energy of surrounding rock can be released, and the damage of the support structure is avoided. Simultaneously, current monitoring system mainly arranges in the rock mass surface, and the monitoring is arranged and is wasted time and energy and the cost is higher, lacks the monitoring to stock operating condition, lacks abundant monitoring data in the research process that the tunnel was strutted, can unify the construction with monitoring system and support system at the inside array displacement meter of embedding of stock, the full life cycle's of research stock working condition that can be better.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-tapping abdicating anchor rod with functions of controlling large deformation of soft rock and monitoring displacement, and the self-tapping abdicating anchor rod can realize the effects of anchoring the soft rock, releasing deformation energy of rock mass and monitoring six-direction freedom degree of the anchor rod.
In order to solve the above technical problems, the present invention provides a self-tapping type abdicating anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function, comprising: the device comprises a hollow self-tapping threaded rod body 1, a high-strength nut 2, a constant-resistance abdicating component extrusion head 3, a micro electro mechanical system array data line fixing buckle 4, an outer sleeve 5, a tray 6, a constant-resistance abdicating inner cylinder 9, a micro electro mechanical system accelerometer 10 and a micro electro mechanical system array data line 11; the hollow self-tapping type threaded rod body 1 is deformed and then transmits force to a constant-resistance abdicating component extrusion head 3 through a high-strength nut 2, the constant-resistance abdicating component extrusion head 3 extrudes a constant-resistance abdicating inner cylinder 9 to enable the constant-resistance abdicating inner cylinder to be yielded, an outer sleeve 5 is positioned outside the constant-resistance abdicating inner cylinder 9 and prevents the constant-resistance abdicating inner cylinder 9 from being damaged and then falling to influence construction, a tray 6 is contacted with a rock body and transmits the tensile force of an anchor rod to the rock body, the tray 6 is connected with the outer sleeve 5, the constant-resistance abdicating inner cylinder 9, the constant-resistance abdicating component extrusion head 3, the high-strength nut 2 and the hollow self-tapping type threaded rod body 1, a micro-electro-mechanical system array data line fixing buckle 4 is arranged outside the outer sleeve 5, the micro-electro-mechanical system accelerometer 10 is fixed on the inner side of the anchor rod body, and the micro-electro-mechanical system array data line 11 is connected with the micro-mechanical system accelerometer 10 in series.
Preferably, the hollow self-tapping threaded rod body 1 includes a threaded rod body 7 and a self-tapping rod body 8; the threaded rod body 7 is as stock anchor section, and the self tapping formula body of rod 8 is as the stock free segment, and threaded rod body section 7 can take place to warp after the stock atress.
Preferably, the length of the micro electro mechanical system array data line 11 is longer than that of the hollow self-tapping threaded rod body 1, so that the micro electro mechanical system array data line 11 is prevented from being broken in the deformation process of the anchor rod, the micro electro mechanical system array data line 11 extends out of the anchor rod body by 30-40 cm, the rod body is lengthened after the abdicating function of the abdicating anchor rod takes effect, and the micro electro mechanical system array data line 11 is always located outside the hollow anchor rod body so as to facilitate data acquisition.
Preferably, the constant-resistance yielding component extrusion head 3 is made of Q345 steel and has an inverted frustum structure.
Preferably, the outer sleeve 5 and the constant-resistance yielding inner cylinder 9 are made of Q235 steel, and the inner diameter of the constant-resistance yielding inner cylinder 9 is smaller than the diameter of the upper bottom surface of the extrusion head 3 of the constant-resistance yielding component.
The invention has the beneficial effects that: (1) during the action of the anchor rod, the surrounding rock is allowed to generate larger deformation, and the deformation energy of the surrounding rock is released; (2) the free section of the self-tapping anchor rod body can deform, so that the problem of failure of a yielding component caused by limited deformation of a full-length anchoring anchor rod is solved, and meanwhile, compared with an end-anchoring anchor rod, the self-tapping anchor rod has a longer anchoring distance and can effectively prevent the problem of anchoring failure in soft rock; (3) the array type displacement meter comprises a plurality of micro-electro-mechanical system acceleration displacement meters, six-direction freedom degrees of the measuring points can be measured, and the working state of the anchor rod can be accurately obtained.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the structure of the present invention.
Fig. 3 is a top view of the constant resistance abdicating member of the present invention.
Fig. 4 is a cross-sectional view of a constant resistance abdicating member of the present invention.
Wherein, 1, the hollow self-tapping screw rod body; 2. a high strength nut; 3. a constant resistance abdicating member extrusion head; 4. the data line fixing buckle of the micro electro mechanical system array; 5. an outer sleeve; 6. a tray; 7. a threaded rod body; 8. a self-tapping rod body; 9. a constant-resistance yielding inner cylinder; 10. a micro-electro-mechanical system accelerometer; 11. and the micro-electro-mechanical system array data line.
Detailed Description
As shown in fig. 1-2, a self tapping formula of giving way stock that has displacement monitoring function concurrently is deformed greatly to control soft rock includes: the device comprises a hollow self-tapping threaded rod body 1, a high-strength nut 2, a constant-resistance abdicating component extrusion head 3, a micro electro mechanical system array data line fixing buckle 4, an outer sleeve 5, a tray 6, a constant-resistance abdicating inner cylinder 9, a micro electro mechanical system accelerometer 10 and a micro electro mechanical system array data line 11; the hollow self-tapping type threaded rod body 1 is deformed and then transmits force to a constant-resistance abdicating component extrusion head 3 through a high-strength nut 2, the constant-resistance abdicating component extrusion head 3 extrudes a constant-resistance abdicating inner cylinder 9 to enable the constant-resistance abdicating inner cylinder to be yielded, an outer sleeve 5 is positioned outside the constant-resistance abdicating inner cylinder 9 and prevents the constant-resistance abdicating inner cylinder 9 from being damaged and then falling to influence construction, a tray 6 is contacted with a rock body and transmits the tensile force of an anchor rod to the rock body, the tray 6 is connected with the outer sleeve 5, the constant-resistance abdicating inner cylinder 9, the constant-resistance abdicating component extrusion head 3, the high-strength nut 2 and the hollow self-tapping type threaded rod body 1, a micro-electro-mechanical system array data line fixing buckle 4 is arranged outside the outer sleeve 5, the micro-electro-mechanical system accelerometer 10 is fixed on the inner side of the anchor rod body, and the micro-electro-mechanical system array data line 11 is connected with the micro-mechanical system accelerometer 10 in series.
The hollow self-tapping type threaded rod body 1 comprises a threaded rod body 7 and a self-tapping type rod body 8; the threaded rod body 7 is as stock anchor section, and the self tapping formula body of rod 8 is as the stock free segment, and threaded rod body section 7 can take place to warp after the stock atress.
The length of the micro electro mechanical system array data line 11 is longer than that of the hollow self-tapping type threaded rod body 1, so that the micro electro mechanical system array data line 11 is prevented from being broken in the deformation process of the anchor rod, the micro electro mechanical system array data line 11 extends out of the anchor rod body by 30-40 cm, the rod body is lengthened after the abdicating function of the abdicating anchor rod takes effect, and the micro electro mechanical system array data line 11 is always located outside the hollow anchor rod body so as to facilitate data acquisition.
The constant-resistance abdicating component extrusion head 3 adopts Q345 steel and is of an inverted frustum structure.
The outer sleeve 5 and the constant-resistance yielding inner cylinder 9 are made of Q235 steel, and the inner diameter of the constant-resistance yielding inner cylinder 9 is smaller than the diameter of the upper bottom surface of the constant-resistance yielding component extrusion head 3.
As shown in fig. 3-4, the constant resistance abdicating component mainly includes a high-strength nut 2, a constant resistance abdicating component extrusion head 3, an outer sleeve 5 and a constant resistance abdicating inner cylinder 9, the rock body deforms, the hollow self-tapping screw rod body 1 deforms after the anchor rod is pulled, the pulling force is transmitted to the constant resistance abdicating component extrusion head 3 through the high-strength nut 2, when the stress is smaller, the constant resistance abdicating component does not deform, when the stress is higher than the yield stress of the constant resistance abdicating inner cylinder 9, the sleeve partially yields, the rod body deforms, the stress is the yield stress of the constant resistance abdicating inner cylinder 9, when the constant resistance abdicating inner cylinder 9 completely yields, the extrusion head contacts with the outer sleeve 5, the contact area between the extrusion head and the outer sleeve 5 is large, and therefore, the rod body does not yield before the anchor rod body breaks.
Claims (5)
1. The utility model provides a self tapping formula of control soft rock large deformation has displacement monitoring function concurrently lets a stock which characterized in that includes: the device comprises a hollow self-tapping threaded rod body (1), a high-strength nut (2), a constant-resistance abdicating component extrusion head (3), a micro electro mechanical system array data line fixing buckle (4), an outer side sleeve (5), a tray (6), a constant-resistance abdicating inner cylinder (9), a micro electro mechanical system accelerometer (10) and a micro electro mechanical system array data line (11); after the hollow self-tapping threaded rod body (1) deforms, force is transmitted to the constant-resistance abdicating component extrusion head (3) through the high-strength nut (2), the constant-resistance abdicating component extrusion head (3) extrudes the constant-resistance abdicating inner cylinder (9) to enable the constant-resistance abdicating component extrusion head to yield, the outer side sleeve (5) is positioned outside the constant-resistance abdicating inner cylinder (9) to prevent the constant-resistance abdicating inner cylinder (9) from dropping after being damaged to influence construction, the tray (6) is in contact with a rock body to transmit the tension of the anchor rod to the rock body, the tray (6) is in contact with the outer side sleeve (5) and the constant-resistance abdicating inner cylinder (9), the constant-resistance abdicating component extrusion head (3), the high-strength nut (2) and the hollow self-tapping type threaded rod body (1) are connected, a micro-electro-mechanical system array data line fixing buckle (4) is arranged outside the outer side sleeve (5), the micro-electro-mechanical system accelerometer (10) is fixed on the inner side of the anchor rod body, and the micro-electro-mechanical system array data line (11) is connected with the micro-electro-mechanical system accelerometer (10) in series.
2. A self-tapping concession anchor rod for controlling large deformation of soft rock and monitoring displacement as claimed in claim 1, wherein the hollow self-tapping threaded rod body (1) comprises a threaded rod body (7) and a self-tapping rod body (8); the threaded rod body (7) is used as an anchor rod anchoring section, the self-tapping type rod body (8) is used as an anchor rod free section, and the threaded rod body section (7) deforms after the anchor rod is stressed.
3. A self-tapping type abdicating anchor rod capable of controlling large deformation of soft rock and having a displacement monitoring function as claimed in claim 1, wherein the length of the micro electro mechanical system array data line (11) is longer than that of the hollow self-tapping type threaded rod body (1), the micro electro mechanical system array data line (11) extends out of the hollow self-tapping type threaded rod body (1) by 30cm to 40cm, the rod body is elongated after the abdicating function is effective, and the micro electro mechanical system array data line (11) is always positioned outside the hollow self-tapping type threaded rod body (1) so as to facilitate data acquisition.
4. A self-tapping type abdicating anchor rod capable of controlling large deformation of soft rock and monitoring displacement as claimed in claim 1, wherein the extrusion head (3) of the constant-resistance abdicating component is made of Q345 steel and has an inverted circular truncated cone structure.
5. A self-tapping type abdicating anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function as claimed in claim 1, wherein the outer sleeve (5) and the constant-resistance abdicating inner cylinder (9) are made of Q235 steel, and the inner diameter of the constant-resistance abdicating inner cylinder (9) is smaller than the diameter of the upper bottom surface of the constant-resistance abdicating member extrusion head (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085731.7A CN113653522A (en) | 2021-09-16 | 2021-09-16 | Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085731.7A CN113653522A (en) | 2021-09-16 | 2021-09-16 | Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113653522A true CN113653522A (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111085731.7A Pending CN113653522A (en) | 2021-09-16 | 2021-09-16 | Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113653522A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1980712A1 (en) * | 2007-04-13 | 2008-10-15 | Lipsker & Partners Engineering Services (1975) Ltd | Load cell for ground anchors |
| CN102182182A (en) * | 2011-04-13 | 2011-09-14 | 杭州图强工程材料有限公司 | Pressure-yielding anchor device |
| CN102877870A (en) * | 2012-10-18 | 2013-01-16 | 湖南科技大学 | Static and dynamic combined intelligent pre-warning anchor rod |
| CN104895597A (en) * | 2015-01-30 | 2015-09-09 | 湖南科技大学 | Large-deformation constant-resistance periodic yielding bolt |
| CN108119175A (en) * | 2016-11-29 | 2018-06-05 | 辽宁工程技术大学 | A kind of resigning buffering energy-absorbing impact preventing anchor rod |
| CN109695463A (en) * | 2019-03-08 | 2019-04-30 | 成都理工大学 | A kind of pressure-pipe type frictional resistance type Extendable anchor rod |
| CN210239718U (en) * | 2019-07-31 | 2020-04-03 | 湖南科技大学 | Pressure-yielding fastening device for protecting anchor rod and anchor tail thread section |
| CN112610256A (en) * | 2020-12-24 | 2021-04-06 | 中铁二院工程集团有限责任公司 | Self-drilling type yielding hollow anchor rod and anchoring method |
-
2021
- 2021-09-16 CN CN202111085731.7A patent/CN113653522A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1980712A1 (en) * | 2007-04-13 | 2008-10-15 | Lipsker & Partners Engineering Services (1975) Ltd | Load cell for ground anchors |
| CN102182182A (en) * | 2011-04-13 | 2011-09-14 | 杭州图强工程材料有限公司 | Pressure-yielding anchor device |
| CN102877870A (en) * | 2012-10-18 | 2013-01-16 | 湖南科技大学 | Static and dynamic combined intelligent pre-warning anchor rod |
| CN104895597A (en) * | 2015-01-30 | 2015-09-09 | 湖南科技大学 | Large-deformation constant-resistance periodic yielding bolt |
| CN108119175A (en) * | 2016-11-29 | 2018-06-05 | 辽宁工程技术大学 | A kind of resigning buffering energy-absorbing impact preventing anchor rod |
| CN109695463A (en) * | 2019-03-08 | 2019-04-30 | 成都理工大学 | A kind of pressure-pipe type frictional resistance type Extendable anchor rod |
| CN210239718U (en) * | 2019-07-31 | 2020-04-03 | 湖南科技大学 | Pressure-yielding fastening device for protecting anchor rod and anchor tail thread section |
| CN112610256A (en) * | 2020-12-24 | 2021-04-06 | 中铁二院工程集团有限责任公司 | Self-drilling type yielding hollow anchor rod and anchoring method |
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