CN111705794A - Anchor rod resistance increasing device and construction method thereof - Google Patents
Anchor rod resistance increasing device and construction method thereof Download PDFInfo
- Publication number
- CN111705794A CN111705794A CN202010594239.1A CN202010594239A CN111705794A CN 111705794 A CN111705794 A CN 111705794A CN 202010594239 A CN202010594239 A CN 202010594239A CN 111705794 A CN111705794 A CN 111705794A
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- CN
- China
- Prior art keywords
- sleeve
- vertical rib
- rod body
- rock
- anchor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention relates to an anchor rod resistance increasing device and a construction method thereof, and the anchor rod resistance increasing device comprises a rod body and a sleeve, wherein one end of the rod body is inserted and screwed into the upper end of the sleeve, the lower end of the sleeve is closed, two vertical rib units which are arranged diagonally to each other and two diagonal rib units which are arranged diagonally to each other are outwards formed on the outer wall of the sleeve, the two vertical rib units and the two diagonal rib units are distributed at intervals, the included angle between each diagonal rib unit and the two adjacent vertical rib units is equal, and each vertical rib unit comprises two vertical rib combinations which are symmetrically distributed; the invention can provide enough pulling resistance; even if the rock-soil body deforms in the later period, a good stabilizing effect can be achieved so as to improve the safety and reliability; in addition, the invention has simple structure, low cost and convenient operation.
Description
Technical Field
The invention relates to an anchor rod resistance increasing device and a construction method thereof.
Background
The anchor rod can fully utilize the self bearing capacity of the undisturbed soil to play a role in reinforcing, is a support form which has small disturbance to the undisturbed soil, quick construction, economy and reasonability, and plays an increasingly important role in foundation pit support, roadway support and side slope support.
In the supporting process of the existing anchor rod, the uplift force is mainly provided by an anchoring body and a rock-soil body, and the contact area between the anchoring body and the rock-soil body is smaller, so that the uplift force is smaller, and the anchoring effect is not ideal; and the anchor body and the rock-soil body have a gap and can move relatively, and once the soil quality is loosened or generates large deformation in the later stage, the sufficient safety guarantee cannot be provided, so that the support engineering is damaged.
For example, the chinese patent with application number 201810134630.6 discloses a resistance-increasing rod, when a certain deformation occurs to a surrounding rock, the resistance-increasing device and the rod are relatively displaced so as to adapt to the deformation of the surrounding rock, and the length of the rod is extended; but has the following disadvantages: when deformed, the rod body is extended in length, but the surrounding rock is deformed together with the rod body.
Further, as disclosed in chinese patent No. 201110368805.8, a continuous resistance-increasing deformable anchor cable is provided, in which the outer wall of the retractable member is provided with adaptive circumferential ribs, which can increase the friction coefficient, but has the following disadvantages: the anti-pulling force or the frictional resistance generated by the contact of the circumferential ribs and the surrounding rock is small, and the contribution to the stability is small.
Disclosure of Invention
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide an anchor rod resistance increasing device and a construction method thereof, wherein the anchor rod resistance increasing device and the construction method thereof can form a whole with a rock-soil body to provide a sufficient anti-pulling force, and can achieve a good stabilizing effect to improve safety and reliability, and the anchor rod resistance increasing device has a simple structure, low cost and convenient operation.
The technical scheme adopted by the invention for solving the technical problems is as follows: the anchor rod resistance increasing device comprises a rod body and a sleeve, and is characterized in that one end of the rod body is inserted into the upper end of the sleeve in a screwed connection mode, the lower end of the sleeve is closed, two vertical rib units which are diagonally arranged and two diagonal rib units which are diagonally arranged are formed on the outer wall of the sleeve outwards, the two vertical rib units and the two diagonal rib units are distributed at intervals, included angles between each diagonal rib unit and the two adjacent vertical rib units are equal, each vertical rib unit comprises two symmetrically distributed vertical rib combinations, two slotted holes which are diagonally arranged are formed in the outer wall of the sleeve, and each slotted hole is formed between the two vertical rib combinations in one vertical rib unit on the corresponding side; the vertical rib combination comprises a plurality of vertically arranged vertical ribs, and the oblique rib unit comprises a plurality of vertically arranged oblique ribs; the telescopic expansion joint comprises a rod body and is characterized in that a conical cavity is formed in the upper end of the sleeve, an expansion cavity is formed in the bottom of the conical cavity, a conical head is formed at one end of the rod body, and the conical head penetrates through the conical cavity and is inserted into the expansion cavity in a threaded mode.
Preferably, the device further comprises a tray, an antifriction washer and a nut; antifriction packing ring and tray are in proper order from last down the cover establish outside the pole body, the nut cover is established the spiro union on the pole body and antifriction packing ring's top.
A construction method of an anchor rod resistance-increasing device is characterized by comprising the following steps:
(1) and drilling an anchor hole in the rock-soil body.
(2) The sleeve is inserted into the anchor hole, the lower end of the sleeve is properly embedded into soil at the bottom of the anchor hole, and the outer end of each vertical rib is tightly propped against the inner wall of the anchor hole so as to ensure that the sleeve and the anchor hole are concentrically arranged.
(3) One end of the rod body is inserted into the conical cavity and slowly rotated, so that the rod body is slowly screwed into the expansion cavity by means of the conical head.
(4) After the inspection is qualified, the rod body is continuously rotated to be continuously inserted into the expansion cavity, so that the middle part of the sleeve is slowly expanded and deformed outwards, and each vertical rib is inserted into the rock-soil body along with the outward expansion of the sleeve; in addition, each diagonal rib is also inserted into the rock-soil mass as the sleeve expands outward.
(5) And (4) performing high-pressure jet grouting on the anchor hole to fill the gap between the sleeve and the anchor hole, so that the sleeve and the rock-soil body form a whole.
(6) After the slurry is solidified, the tray and the friction reducing gasket are sleeved on the rod body in sequence, the lower side of the tray is tightly attached to the surface of the rock-soil body, and then the nut is sleeved on the rod body in a threaded mode and is pressed on the upper side of the tray by means of the friction reducing gasket to complete construction.
Preferably, the inner diameter of the anchor hole in the step (1) is slightly larger than the maximum outer diameter of the sleeve in the non-expanded state, and the depth of the anchor hole is slightly smaller than the length of the sleeve.
Compared with the prior art, the invention has the advantages that:
1. the rod body can make the sleeve self-expand with the help of the tapered cavity and the expansion cavity in the process of screwing in the sleeve, and then the sleeve is tightly combined with rock and soil bodies outside the slip fracture surface.
2. The setting of slotted hole does benefit to the outside expansion of sleeve and warp, and the sleeve can drive a plurality of vertical ribs and a plurality of oblique rib and insert the ground body when the expansion, has directly increased the resistance to plucking, is favorable to better assurance supporting construction's stability, improves factor of safety.
3. Because the plurality of oblique ribs are inserted into the rock-soil body and form a whole with the rock-soil body, even if the rock-soil body generates displacement deformation in the later period, the plurality of oblique ribs can play a role in automatically stabilizing the slope body, thereby improving the safety and reliability.
4. Simple structure, with low costs, the sleeve is convenient with the equipment of the body of rod moreover.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of the pallet, friction reducing washer and nut of the present invention;
FIG. 3 is a structural view of a slot of the present invention;
FIG. 4 is a structural view of the diagonal rib of the present invention;
FIG. 5 is a diagram of the location of vertical ribs and slots in accordance with the present invention;
fig. 6 is an internal structural view of the sleeve of the present invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
As shown in fig. 1 to 6, an anchor rod resistance increasing device comprises a rod body 1 and a sleeve 2, wherein one end of the rod body 1 is inserted into and screwed into the upper end of the sleeve 2, the lower end of the sleeve 2 is closed, two vertical rib units which are diagonally arranged with each other and two diagonal rib units which are diagonally arranged with each other are formed outwards on the outer wall of the sleeve 2, the two vertical rib units and the two diagonal rib units are distributed at intervals, an included angle between each diagonal rib unit and the two adjacent vertical rib units is equal, each vertical rib unit comprises two symmetrically distributed vertical rib combinations, two slotted holes 6 which are diagonally arranged with each other are formed in the outer wall of the sleeve 2, and each slotted hole 6 is formed between the two vertical rib combinations in one vertical rib unit on the corresponding side; the vertical rib combination comprises a plurality of vertically arranged vertical ribs 4, and the oblique rib unit comprises a plurality of vertically arranged oblique ribs 5; the upper end of sleeve 2 has been seted up conical cavity 21, and the expansion chamber 22 has been seted up to the bottom in conical cavity 21, and the one end of the body of rod 1 is formed with conical head 3, and conical head 3 passes conical cavity 21 and inserts the spiro union in expansion chamber 22.
In a preferred embodiment of the invention, the resistance increasing device further comprises a tray 7, an antifriction washer 8 and a nut 9; the antifriction washer 8 and the tray 7 are sequentially sleeved outside the rod body 1 from top to bottom, and the nut 9 is sleeved on the rod body 1 and above the antifriction washer 8 in a threaded manner.
A construction method of an anchor rod resistance-increasing device comprises the following steps:
(1) and drilling an anchor hole in the rock-soil body according to the outer diameter of the sleeve 2, wherein the inner diameter of the anchor hole is slightly larger than the maximum outer diameter of the sleeve 2 in a non-expansion state, and the depth of the anchor hole is slightly smaller than the length of the sleeve 2.
(2) Insert the anchor eye with sleeve 2 to make its lower extreme suitably imbed in the anchor eye bottom soil body, thereby increased the frictional force between sleeve 2 and the ground body, in order to avoid the body of rod 1 to drive sleeve 2 together rotatory after inserting spiro union to sleeve 2, the equal top of the outer end of every perpendicular rib 4 at this moment is tight on the inner wall of anchor eye, thereby has played the centering effect, guarantees that sleeve 2 and anchor eye set up with one heart.
(3) One end of the rod body 1 is inserted into the conical cavity 21 and slowly rotated, so that the rod body 1 is slowly screwed into the expansion cavity 22 by the conical head 3;
(4) whether the rod body 1 is concentric with the sleeve 2 or not is checked, whether the sleeve 2 rotates along with the rod body 1 or not is checked, after the check is qualified, the rod body 1 continues to rotate so that the rod body 1 continues to go deep into the expansion cavity 22 and further extrudes the expansion cavity 22 outwards, and due to the existence of the two slotted holes 6, the middle part of the sleeve 2 slowly expands outwards and deforms, so that each vertical rib 4 is inserted into a rock-soil body along with the outward expansion of the sleeve 2, the pulling resistance is directly increased, the stability of a supporting structure is better guaranteed, and the safety factor is improved; in addition, each inclined rib 5 is inserted into the rock-soil body along with the outward expansion of the sleeve 2, so that the pulling resistance can be effectively increased, and the effect of automatically stabilizing the slope body can be achieved after the rock-soil body generates displacement deformation, thereby improving the safety and reliability.
(5) And (3) performing high-pressure jet grouting on the anchor hole to fill the gap between the sleeve 2 and the anchor hole, so that the sleeve 2 and the rock-soil body form a whole.
(6) After the slurry is solidified, the tray 7 and the antifriction washer 8 are sequentially sleeved on the rod body 1, the lower side of the tray 7 is tightly attached to the surface of a rock-soil body, and then the nut 9 is sleeved and screwed on the rod body 1 and is pressed on the upper side of the tray 7 by the antifriction washer 8 to complete construction.
In the process that the rod body 1 is screwed into the sleeve 2, the sleeve 2 can be self-expanded by means of the conical cavity 21 and the expansion cavity 22, so that the sleeve 2 is tightly combined with rock and soil masses outside a sliding crack surface, and a sufficient pulling resistance is provided; the vertical ribs 4 and the oblique ribs 5 on the outer wall of the sleeve 2 are inserted into the rock-soil mass and form a whole with the rock-soil mass after grouting, so that a good stabilizing effect can be achieved to improve the safety and reliability even if the rock-soil mass deforms in the later period; in addition, the invention has simple structure, low cost and convenient operation.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The anchor rod resistance increasing device comprises a rod body and a sleeve, and is characterized in that one end of the rod body is inserted into the upper end of the sleeve in a screwed connection mode, the lower end of the sleeve is closed, two vertical rib units which are diagonally arranged and two diagonal rib units which are diagonally arranged are formed on the outer wall of the sleeve outwards, the two vertical rib units and the two diagonal rib units are distributed at intervals, included angles between each diagonal rib unit and the two adjacent vertical rib units are equal, each vertical rib unit comprises two symmetrically distributed vertical rib combinations, two slotted holes which are diagonally arranged are formed in the outer wall of the sleeve, and each slotted hole is formed between the two vertical rib combinations in one vertical rib unit on the corresponding side; the vertical rib combination comprises a plurality of vertically arranged vertical ribs, and the oblique rib unit comprises a plurality of vertically arranged oblique ribs; the telescopic expansion joint comprises a rod body and is characterized in that a conical cavity is formed in the upper end of the sleeve, an expansion cavity is formed in the bottom of the conical cavity, a conical head is formed at one end of the rod body, and the conical head penetrates through the conical cavity and is inserted into the expansion cavity in a threaded mode.
2. The anchor rod resistance increasing device according to claim 1, further comprising a tray, a friction reducing washer and a nut; antifriction packing ring and tray are in proper order from last down the cover establish outside the pole body, the nut cover is established the spiro union on the pole body and antifriction packing ring's top.
3. A construction method of an anchor rod resistance-increasing device is characterized by comprising the following steps:
(1) drilling an anchor hole in a rock-soil body;
(2) inserting the sleeve into the anchor hole and enabling the lower end of the sleeve to be properly embedded into a soil body at the bottom of the anchor hole, wherein the outer end of each vertical rib is tightly propped against the inner wall of the anchor hole so as to ensure that the sleeve and the anchor hole are concentrically arranged;
(3) one end of the rod body is inserted into the conical cavity and slowly rotated, so that the rod body is slowly screwed into the expansion cavity by virtue of the conical head;
(4) after the inspection is qualified, the rod body is continuously rotated to be continuously inserted into the expansion cavity, so that the middle part of the sleeve is slowly expanded and deformed outwards, and each vertical rib is inserted into the rock-soil body along with the outward expansion of the sleeve; in addition, each diagonal rib is also inserted into the rock-soil mass as the sleeve expands outward;
(5) performing high-pressure jet grouting on the anchor hole to fill a gap between the sleeve and the anchor hole so as to enable the sleeve and the rock-soil body to form a whole;
(6) after the slurry is solidified, the tray and the friction reducing gasket are sleeved on the rod body in sequence, the lower side of the tray is tightly attached to the surface of the rock-soil body, and then the nut is sleeved on the rod body in a threaded mode and is pressed on the upper side of the tray by means of the friction reducing gasket to complete construction.
4. The construction method of the anchor rod resistance increasing device according to the claim 3, wherein the inner diameter of the anchor hole in the step (1) is slightly larger than the maximum outer diameter of the sleeve in the non-expansion state, and the depth of the anchor hole is slightly smaller than the length of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594239.1A CN111705794A (en) | 2020-06-28 | 2020-06-28 | Anchor rod resistance increasing device and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594239.1A CN111705794A (en) | 2020-06-28 | 2020-06-28 | Anchor rod resistance increasing device and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111705794A true CN111705794A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010594239.1A Pending CN111705794A (en) | 2020-06-28 | 2020-06-28 | Anchor rod resistance increasing device and construction method thereof |
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| Country | Link |
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| CN (1) | CN111705794A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266022A (en) * | 2021-05-26 | 2021-08-17 | 重庆工程职业技术学院 | Grid fixing device for slope support |
| NO20210696A1 (en) * | 2021-06-02 | 2022-12-05 | Tunnelsupply As | Strut for anchoring fittings in tunnels and rock rooms |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388349Y (en) * | 1999-07-12 | 2000-07-19 | 孟凡新 | Screw internal expansion anchoring-bolt |
| CN201190715Y (en) * | 2008-03-25 | 2009-02-04 | 赵永生 | Screwing self locking type thermal insulation expansion anchor bolt |
| KR20120105129A (en) * | 2011-03-15 | 2012-09-25 | 김원일 | Extended anchor bolt |
| CN104061220A (en) * | 2014-06-24 | 2014-09-24 | 黄传勇 | Expansion bolt installed by using hammering way |
| CN208010382U (en) * | 2018-04-03 | 2018-10-26 | 内蒙古综合交通科学研究院有限责任公司 | A kind of recoverable tube expansion anchor pole |
| CN208792316U (en) * | 2018-06-01 | 2019-04-26 | 甘肃省合作早子沟金矿有限责任公司 | A kind of firm anchor rod device |
-
2020
- 2020-06-28 CN CN202010594239.1A patent/CN111705794A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388349Y (en) * | 1999-07-12 | 2000-07-19 | 孟凡新 | Screw internal expansion anchoring-bolt |
| CN201190715Y (en) * | 2008-03-25 | 2009-02-04 | 赵永生 | Screwing self locking type thermal insulation expansion anchor bolt |
| KR20120105129A (en) * | 2011-03-15 | 2012-09-25 | 김원일 | Extended anchor bolt |
| CN104061220A (en) * | 2014-06-24 | 2014-09-24 | 黄传勇 | Expansion bolt installed by using hammering way |
| CN208010382U (en) * | 2018-04-03 | 2018-10-26 | 内蒙古综合交通科学研究院有限责任公司 | A kind of recoverable tube expansion anchor pole |
| CN208792316U (en) * | 2018-06-01 | 2019-04-26 | 甘肃省合作早子沟金矿有限责任公司 | A kind of firm anchor rod device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266022A (en) * | 2021-05-26 | 2021-08-17 | 重庆工程职业技术学院 | Grid fixing device for slope support |
| NO20210696A1 (en) * | 2021-06-02 | 2022-12-05 | Tunnelsupply As | Strut for anchoring fittings in tunnels and rock rooms |
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Application publication date: 20200925 |
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