CN109267571B - Anchoring device under condition of cavity in slope body and construction method thereof - Google Patents
Anchoring device under condition of cavity in slope body and construction method thereof Download PDFInfo
- Publication number
- CN109267571B CN109267571B CN201811323335.1A CN201811323335A CN109267571B CN 109267571 B CN109267571 B CN 109267571B CN 201811323335 A CN201811323335 A CN 201811323335A CN 109267571 B CN109267571 B CN 109267571B
- Authority
- CN
- China
- Prior art keywords
- umbrella
- anchor
- chain
- head
- mortar
- 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.)
- Active
Links
- 238000004873 anchoring Methods 0.000 title claims abstract description 95
- 238000010276 construction Methods 0.000 title claims abstract description 11
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims 1
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to an anchoring device under the condition that a cavity exists in a slope body and a construction method thereof, wherein the anchoring device comprises an umbrella-shaped anchoring head (7), an anchor rope (4) and a lockable chain (6) for connecting the umbrella-shaped anchoring head and the anchor rope; the waterproof umbrella surface (19) in the umbrella-shaped anchoring head (7) is used for injecting mortar after being unfolded by the umbrella framework in the cavity (2) so as to form a mortar expanding head in the wrapping range; the engageable chain (6) can be engaged into a straight line under the compression condition, has certain bending rigidity as a whole, and can be stretched into a common chain shape after being subjected to the stretching action. The invention effectively solves the problem that the anchor cable is easy to break due to uneven stress of the inner bending point and the outer bending point of the anchor cable at the bending point position; the construction of the enlarged footing is not affected even if the cavity is large in volume and is quite odd in shape, the feasibility is strong, and the anchor cable can be provided with enough anchoring force when the anchor cable enters a working state; only a small amount of mortar is needed to provide enough anchoring force for the anchor cable, so that resources are saved.
Description
Technical Field
The invention relates to the technical field of rock-soil anchoring in side slope support, in particular to an anchoring device under the condition that a cavity exists in a slope body and a construction method thereof.
Background
In slope supporting engineering, the prestressed anchor cable is often used in combination with various supporting structures, such as a frame prestressed anchor cable supporting structure, an anchor-pulling type pile plate wall supporting structure and a prestressed anchor cable composite soil nailing wall supporting structure. The prestressed anchor cable can transfer the back side soil pressure of the slope soil body to the slope deep soil body of the slope supporting structure, so that the slope is reinforced by utilizing the anchoring acting force of the deep soil body.
In general, the magnitude of the anchoring force provided by the anchoring action is related to the diameter of the anchoring body and the length of the anchoring body, and if cavities exist in the mountain bodies within the range of the anchor cable anchoring section, the anchor cable anchoring length often cannot meet the design requirements. When encountering such geological conditions, the following measures are often adopted at the present stage:
(1) The aperture of the anchor hole is enlarged, the cavity is filled with low-grade plain concrete, and the hole is drilled again when the strength of the concrete reaches 80 percent, so that the measure often consumes a large amount of manpower and material resources, and resources are wasted greatly.
(2) According to the existing anchor holes penetrating into the PVC pipeline, the PVC pipeline passes through the cavity area, bottoms out to the edge of the cavity, and holes are drilled again until the designed anchoring length is met.
(3) The design is changed or the angle of the anchor cable is changed, the volume and the relative position of the cavity cannot be accurately determined, and a great deal of manpower and material resources are wasted from the construction of the support engineering to the half of the design change.
Therefore, the problems that the anchor rope anchoring section cannot provide enough anchoring force are solved well, a large amount of manpower and material resources are consumed, and the feasibility is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anchoring device under the condition that a cavity exists in a slope body, which can provide enough anchoring force, has strong feasibility and saves resources such as manpower, material resources and the like. In addition, the invention also provides a construction method of the anchoring device.
In order to solve the above problems, the present invention provides an anchoring device for a slope body in which a cavity exists, the anchoring device comprising: an umbrella-shaped anchoring head, an anchor rope and a chain capable of being engaged with the umbrella-shaped anchoring head and the anchor rope; the umbrella-shaped anchoring head comprises a central stay bar, an umbrella framework arranged on the central stay bar and a waterproof umbrella cover arranged on the umbrella framework, and one end of the central stay bar, which is far away from the waterproof umbrella cover, is connected with the occlusal chain; the umbrella-shaped anchoring head is provided with a triggering part which can enable the umbrella framework to be unfolded after the umbrella-shaped anchoring head enters the cavity from the slope anchor hole; the waterproof umbrella cover is used for injecting mortar after being unfolded and locked by the umbrella framework in the cavity so as to form a mortar expansion head in the wrapping range; the lockable chain can be locked into a straight line under the compression condition, has certain bending rigidity as a whole, and can be stretched into a common chain shape after being subjected to the stretching action.
Preferably, the engageable chain is formed by connecting a plurality of sub-chains in an end-to-end engagement manner; two protruding opposite biting teeth are arranged at the head end and the tail end of each sub-chain, and the directions of the two groups of biting teeth at the head end and the tail end are mutually perpendicular; the head end of each sub-chain is provided with a concave space for accommodating the biting tooth at the tail end of the previous sub-chain, and the tail end of each sub-chain is provided with a concave space for accommodating the biting tooth at the head end of the subsequent sub-chain; the front and rear sub-chains are connected by pins arranged between the respective biting teeth.
Preferably, the umbrella framework comprises a stator supporting plate arranged at the front end of the center supporting rod, a rotor supporting plate sleeved at the rear end of the center supporting rod, an inner supporting rod and an outer supporting rod arranged between the stator supporting plate and the rotor supporting plate and used for forming an umbrella frame, and a limiting component arranged on the center supporting rod and used for limiting the rotor supporting plate to continuously move forwards; the triggering part is a spring sleeved on the center stay bar and positioned behind the rotor stay plate.
Preferably, the limiting component is a sleeve sleeved on the central supporting rod, one end of the sleeve is connected with the stator supporting plate, and the other end of the sleeve is used for blocking the rotor supporting plate moving forwards.
Preferably, the stator support plate is in threaded connection with the center support rod, and the center support rod is provided with an external thread for being in threaded connection with the stator support plate.
Preferably, the center stay bar is connected with the engageable chain through a fixed plate, and the fixed plate is in threaded connection with the center stay bar.
Preferably, the anchor cable and the engageable chain are connected through a tooth surface bidirectional anchor plate, the tooth surface bidirectional anchor plate is provided with a through type mounting hole for mounting the anchor cable, and clamping pieces can be inserted into the mounting hole in the front-back direction.
Correspondingly, the invention also provides a construction method of the anchoring device under the condition that the cavity exists in the slope body, which comprises the following steps:
Preparation of the anchoring device before entry: contracting and engaging the engageable chains, and contracting the umbrella framework on the umbrella-shaped anchoring head;
And (3) an anchor device hole: pushing the anchoring device into the anchor hole on the slope body until the umbrella framework on the umbrella-shaped anchoring head opens the waterproof umbrella cover in the cavity (2) under the action of the triggering part;
The anchoring device is mounted in place: pre-tensioning the anchor cable to enable the lockable chain to be disengaged, and locking the position of the umbrella-shaped anchor head after ensuring that the umbrella-shaped anchor head is clamped at an anchor hole of the inner wall of the cavity to enter a normal working state;
grouting: injecting mortar into the anchor holes in batches, so that mortar expansion heads are formed in the range of the waterproof umbrella cover wrapping on the umbrella-shaped anchor heads by the mortar;
tensioning and locking: and tensioning the anchor cable to apply prestress when the strength of the mortar in the anchor hole reaches the design requirement, and locking the anchor cable by using an anchor device.
Preferably, in the grouting step, grouting is started to inject mortar with lower consistency to flush the inner surface of the waterproof umbrella surface, then mortar with higher consistency is injected to form the mortar expansion head, and finally mortar with lower consistency is injected to compact the mortar in the umbrella-shaped anchoring head until the mortar overflows from the anchor hole.
Compared with the prior art, the invention has the following advantages:
1. In the invention, the anchoring device comprises an umbrella-shaped anchoring head, an anchor rope and a lockable chain for connecting the umbrella-shaped anchoring head and the anchor rope; the lockable chain has certain bending rigidity in the locking state, becomes a common chain after the locking state is released, and can transfer the tension force on the anchor cable to the umbrella-shaped anchoring head. Based on this, can become arbitrary angle and use between umbrella-shaped anchor head, center vaulting pole and the anchor rope, effectively solved the anchor rope and in the intraductal bending point of bending point position and the inhomogeneous problem that leads to the anchor rope easy fracture of outer bending point atress.
2. The invention can be used under the condition that a cavity exists in the slope body, the umbrella-shaped anchoring head is placed into the cavity of the slope body through the anchor hole, and an enlarged head with higher strength is formed in the space wrapped by the umbrella-shaped anchoring head in a grouting mode, so that the construction of the enlarged head is not influenced even if the cavity is large in size and is quite strange in shape, the practicability is strong, and when the anchor cable enters a working state, enough anchoring force can be provided for the anchor cable, so that the anchor cable works normally, and the stability of the slope is ensured.
3. Compared with the measures of pouring the mountain cavity by using materials such as concrete and the like in the prior art, the anchoring device can provide enough anchoring force for the anchor cable by using a small amount of mortar, saves resources and reduces cost.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 is a schematic diagram illustrating an overall structure application of an anchoring device according to an embodiment of the present invention.
Fig. 2 is a schematic connection diagram of main components in an anchoring device according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an umbrella-shaped anchoring head in an anchoring device according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of connection between a mover stay plate and an inner stay in an anchoring device according to an embodiment of the present invention.
Fig. 5 is a schematic diagram showing connection among a stator stay plate, an outer stay and a waterproof umbrella cover in an anchoring device according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a sub-chain of a lockable chain in an anchoring device according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a tooth surface bidirectional anchor plate in an anchoring device according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of a fixing plate in an anchoring device according to an embodiment of the present invention.
In the figure: 1-slope body, 2-cavity, 3-anchoring device, 4-anchor rope, 5-tooth surface bidirectional anchor plate, 6-bitable chain, 7-umbrella-shaped anchoring head, 8-clip piece, 9-bited tooth, 10-pin, 11-center stay bar, 12-fixed plate, 13-spring, 14-rotor stay bar, 15-stator stay bar, 16-sleeve, 17-inner stay bar, 18-outer stay bar, 19-waterproof umbrella cover, 20-external thread, 21-I type hinge support and 22-II type hinge support.
Detailed Description
Referring to fig. 1 to 3, an embodiment of the present invention provides an anchoring device in the presence of a cavity in a slope, which includes an umbrella-shaped anchor head 7, an anchor cable 4 and a lockable chain 6 for engaging both; after the installation, the snap chains 6 can occupy a distance from the front to the rear of the anchor holes on the inner wall of the cavity 2, so that the anchor cable 4 is not bent, and the distance is generally 0.5-1.0m.
Specifically, the umbrella-shaped anchoring head 7 comprises a central stay bar 11, an umbrella framework arranged on the central stay bar 11 and a waterproof umbrella cover 19 arranged on the umbrella framework, and one end of the central stay bar 11 far away from the waterproof umbrella cover 19 is connected with the occlusal chain 6.
The umbrella-shaped anchoring head 7 is provided with a triggering part capable of expanding the umbrella framework, specifically, in the use process, the umbrella framework is in a contracted state in the narrow space of the anchor hole, and when the umbrella framework enters the open space in the cavity 2 from the anchor hole of the slope body 1, the triggering part can expand the umbrella framework, so that the waterproof umbrella cover 19 is expanded.
The waterproof umbrella cover 19 is used for being unfolded by the umbrella framework in the cavity 2 and injecting mortar after the locking position so as to form a mortar expanding head in the wrapping range. It will be appreciated that the material from which the waterproof canopy 19 is made should not be easily broken to encase the mortar to form an enlarged head; in practical application, PVC plastic coated canvas can be adopted.
The lockable chain 6 can be locked into a straight line under a compression condition, has certain bending rigidity as a whole, can be used as a rod, and can be stretched into a common chain shape after being subjected to a stretching effect.
Based on the anchoring device disclosed in the above embodiment, in another embodiment of the present invention, the specific structure of the above-described engageable chain 6 is explained.
Referring to fig. 2 and 6, the lockable chain 6 is formed by a plurality of sub-chains connected in an end-to-end engagement manner; two protruding and opposite biting teeth 9 are arranged at the head end and the tail end of each sub-chain, and the directions of the two groups of biting teeth 9 at the head end and the tail end are mutually perpendicular; the front and rear sub-chains are connected by pins 10 provided between the respective biting teeth. The head end of each sub-chain is provided with a concave space for accommodating the biting tooth at the tail end of the previous sub-chain, and the tail end of each sub-chain is provided with a concave space for accommodating the biting tooth at the head end of the subsequent sub-chain; due to the presence of these concave spaces, the engageable chains 6 are able to engage in a straight line in a compressed condition and have a certain bending stiffness as a whole.
Referring to fig. 2 and 7, the anchor cable 4 and the engageable chain 6 are connected by the tooth surface bidirectional anchor plate 5, the common anchor plate can only be inserted into the clamping piece 8 in one direction, while the tooth surface bidirectional anchor plate 5 in the invention is an anchor plate capable of being inserted into the clamping piece 8 in two directions, and is provided with a through type mounting hole for mounting the anchor cable 4, the clamping piece 8 can be inserted into the mounting hole in both front and rear directions, and the clamping piece 8 can be fixed by Cheng Jiao when the condition allows in the actual manufacturing process. Based on the specific structure of the lockable chain 6, the tooth surface bidirectional anchor plate 5 is provided with biting teeth, pins and concave spaces which are matched with the tail end sub-chain on the side connected with the lockable chain 6.
Referring to fig. 2,3 and 8, the center stay 11 is connected with the engageable chain 6 through a fixed plate 12, the fixed plate 12 is in threaded connection with the center stay 11, specifically, the rear end of the center stay 11 is provided with external threads, and the middle part of the top plate 12 is provided with internal threads matched with the external threads. Based on the specific structure of the lockable chain 6, the side of the fixed plate 12 connected with the lockable chain 6 is provided with biting teeth, pins and concave spaces which are matched with the front terminal chain.
Based on the anchoring devices disclosed in the above embodiments, in a further embodiment of the present invention, the specific structure of the umbrella frame and the corresponding triggering member in the above umbrella-shaped anchoring head 7 will be described.
Referring to fig. 2 and 3, the umbrella frame includes a stator supporting plate 15 provided at the front end of the center supporting rod 11, a mover supporting plate 14 sleeved at the rear end of the center supporting rod 11, inner and outer supporting rods provided therebetween in a hinge manner for forming an umbrella stand, and a limiting member provided on the center supporting rod 11.
Based on the specific structure of the umbrella framework, the triggering part for expanding the umbrella framework is a spring 13 sleeved on the center stay bar 11 and positioned behind the rotor stay plate 14, and a cylindrical helical compression spring can be adopted specifically. Based on the connection of the central stay 11 and the fixed plate 12 capable of being engaged with the chain 6 disclosed in the above embodiment, the rear end of the spring 13 is abutted against the front end face of the fixed plate 12. Further, the stator support plate 15 is in threaded connection with the center support rod 11, and the center support rod 11 is provided with an external thread 20 for being in threaded connection with the stator support plate 15; in this way, when the spring 13 cannot store enough energy, the position of the stator brace 15 at the front end of the center brace 11 can be precisely adjusted backward so that the spring 13 stores enough energy.
When the waterproof umbrella is used, the rotor supporting plate 14 can freely move on the central supporting rod 11, the backward movement of the telescopic umbrella framework can compress the spring 13 to accumulate energy, and once the telescopic umbrella framework is in a free state without space limitation, the spring 13 can spring to push the rotor supporting plate 14 to move forward, so that the whole umbrella framework is unfolded, and finally the whole waterproof umbrella cover 19 is unfolded.
In the above process, the limiting member is used to limit the mover stay plate 14 to continue to move forward, so as to ensure that the waterproof umbrella cover 19 finally stays in an umbrella shape with a wrapping space instead of a plane, just like a conventional umbrella. Specifically, the stopper may be a sleeve 16 that is fitted over the center stay 11, and has one end connected to the stator stay 15 and the other end for receiving the mover stay 14 that moves forward.
For the inner and outer stay bars of the umbrella frame, which are arranged between the stator stay plate 15 and the rotor stay plate 14 and are used for forming the umbrella frame, the specific implementation mode of the inner and outer stay bars is referred to the related structure of the umbrella in the prior art. However, this is simply described. Referring to fig. 3 to 5, the inner and outer stay bars specifically include an inner stay bar 17 and an outer stay bar 18, a plurality of outer stay bars 18 are radially and uniformly arranged on the stator stay plate 15, and a hexagonal bolt for fixing a waterproof umbrella surface 19 is arranged outside the outer stay bar 18; one end of the corresponding number of inner supporting rods 17 is arranged on the rotor supporting plate 14, and the other end is connected with the inner side of the outer supporting rods 17.
The outer stay bar 18 is hinged with the stator stay bar 15, the inner stay bar 17 is hinged with the rotor stay bar 14 and the outer stay bar 18, specifically, I-shaped hinge support seats 21 are uniformly distributed on the periphery of the rotor stay bar 14, II-shaped hinge support seats 22 are uniformly distributed on the periphery of the stator stay bar 15, hinge support seats matched with the outer stay bar 18 are arranged on the inner side of the outer stay bar 18, mounting holes are formed in the corresponding positions of the inner stay bar 17 and the outer stay bar 18, and the mounting holes are fixed with the support seats through hexagon bolts.
Based on the anchoring device disclosed in each embodiment, the invention correspondingly provides a construction method of the anchoring device, which specifically comprises the following steps.
(1) Preparation of the anchoring device before entry: the lockable chain 6 is contracted and locked, and the umbrella framework on the umbrella-shaped anchoring head 7 is contracted.
Describing the specific example, firstly, the manufacturing of the anchoring device is completed according to the structure content, secondly, the lockable chain 6 is contracted and locked, and finally, the outer supporting rod 18 on the umbrella-shaped anchoring head 7 is contracted, so that the rotor supporting plate 14 compresses the spring 13. When the spring 13 cannot store enough energy, the position of the stator stay 15 in the center stay 11 is adjusted so that the spring 13 stores enough energy.
(2) And (3) an anchor device hole: the anchoring device is pushed into the anchor hole on the slope body 1 until the umbrella framework on the umbrella-shaped anchoring head 7 opens the waterproof umbrella surface 19 in the cavity 2 under the action of the triggering component.
(3) The anchoring device is mounted in place: the anchor cable 4 is pretensioned to enable the engageable chain 6 to be disengaged, and the position of the umbrella-shaped anchor head 7 is locked after the umbrella-shaped anchor head 7 is clamped at the anchor hole of the inner wall of the cavity 2 and enters a normal working state.
After the lockable chain 6 is disengaged, the umbrella-shaped anchoring head 7, the central supporting rod 11 and the anchor cable 4 can be used at any angle, so that the problem that the anchor cable is easy to break due to uneven stress of an inner bending point and an outer bending point of the anchor cable at the bending point position is effectively solved.
(4) Grouting: mortar is injected into the anchor holes in batches, so that mortar expansion heads are formed in the range of wrapping the high-strength waterproof umbrella surface 19 on the umbrella-shaped anchor heads 7 by the mortar.
Specifically, the grouting pipe is used for injecting the mortar into anchor holes in batches at one time, the grouting is started, the mortar with lower consistency is injected to flush the inner surface of the waterproof umbrella surface 19, so that hole slag brought in the process of entering holes in the space covered by the umbrella-shaped anchoring heads 7 is flushed completely, the mortar expansion heads formed by grouting are ensured to be free from doping impurities, and the strength of the mortar expansion heads is ensured; then, the mortar with higher consistency is injected to form a mortar expansion head, and finally the mortar with lower consistency is injected to compact the mortar in the umbrella-shaped anchoring head 7 until the mortar overflows from the anchor hole.
In the actual operation process, the slurry can be supplemented by the secondary grouting pipe within a certain time after the primary grouting is finished.
(5) Tensioning and locking: and when the strength of the mortar in the anchor hole reaches the design requirement, tensioning the anchor cable 4 to apply prestress, and locking the anchor cable by using an anchor.
The technical scheme provided by the invention is described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the above examples being provided only to facilitate understanding of the structure of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (9)
1. An anchoring device in the presence of a cavity in a slope, the anchoring device comprising:
an umbrella-shaped anchoring head (7), an anchor rope (4) and a lockable chain (6) for connecting the two;
The umbrella-shaped anchoring head (7) comprises a central stay bar (11), an umbrella framework arranged on the central stay bar (11) and a waterproof umbrella cover (19) arranged on the umbrella framework, and one end of the central stay bar (11) far away from the waterproof umbrella cover (19) is connected with the occlusal chain (6);
the umbrella-shaped anchoring head (7) is provided with a triggering part which can lead the umbrella framework to be unfolded after the umbrella-shaped anchoring head enters the cavity (2) from the anchor hole of the slope body (1);
The waterproof umbrella cover (19) is used for injecting mortar after being unfolded and locked by the umbrella framework in the cavity (2) so as to form a mortar enlarged head in the wrapping range;
The lockable chain (6) can be locked into a straight line under the compression condition, has certain bending rigidity as a whole, and can be stretched into a common chain shape after being subjected to the stretching action;
The lockable chain (6) is formed by connecting a plurality of sub-chains in an end-to-end locking manner; two protruding and opposite biting teeth (9) are arranged at the head end and the tail end of each sub-chain, and the directions of the two groups of biting teeth (9) at the head end and the tail end are mutually perpendicular; the head end of each sub-chain is provided with a concave space for accommodating the biting tooth at the tail end of the previous sub-chain, and the tail end of each sub-chain is provided with a concave space for accommodating the biting tooth at the head end of the subsequent sub-chain; the front sub chain and the rear sub chain are connected through pins (10) arranged between the respective biting teeth;
The umbrella framework comprises a stator supporting plate (15) arranged at the front end of the center supporting rod (11), a rotor supporting plate (14) sleeved at the rear end of the center supporting rod (11), an inner supporting rod and an outer supporting rod arranged between the stator supporting plate and the rotor supporting plate for forming an umbrella stand, and a limiting component arranged on the center supporting rod (11) for limiting the rotor supporting plate (14) to continuously move forwards; the triggering part is a spring (13) sleeved on the center stay bar (11) and positioned behind the rotor stay plate (14).
2. Anchoring device according to claim 1, characterized in that the limiting means is a sleeve (16) fitted over the central stay (11), one end of which is connected to the stator stay (15) and the other end of which is adapted to block the mover stay (14) moving forward.
3. Anchoring device according to claim 1 or 2, characterized in that the stator stay (15) is in threaded connection with the central stay (11), the central stay (11) being provided with an external thread for threaded connection with the stator stay (15).
4. Anchoring device according to claim 1 or 2, characterized in that the connection between the central stay (11) and the lockable chain (6) is achieved by means of a fixed plate (12), the fixed plate (12) being in threaded connection with the central stay (11).
5. An anchoring device according to claim 3, characterized in that the connection between the central stay (11) and the lockable chain (6) is achieved by means of a fixed plate (12), the fixed plate (12) being in threaded connection with the central stay (11).
6. Anchoring device according to claim 1 or 2 or 5, characterized in that the connection between the anchor cable (4) and the lockable chain (6) is achieved by means of a toothed bidirectional anchor plate (5), the toothed bidirectional anchor plate (5) having through-going mounting holes for mounting the anchor cable (4), which holes can be inserted into the clamping pieces (8) in both front and rear directions.
7. Anchoring device according to claim 4, characterized in that the connection between the anchor cable (4) and the lockable chain (6) is achieved by means of a toothed bidirectional anchor plate (5), the toothed bidirectional anchor plate (5) having through-going mounting holes for mounting the anchor cable (4), the mounting holes being insertable into the clamping pieces (8) in both front and rear directions.
8. A method of constructing the anchoring device of claim 1, comprising:
Preparation of the anchoring device before entry: shrink-engaging the engageable chain (6) and shrink-engaging the umbrella framework on the umbrella-shaped anchoring head (7);
And (3) an anchor device hole: pushing the anchoring device into an anchor hole on the slope body (1) until an umbrella framework on the umbrella-shaped anchoring head (7) stretches the waterproof umbrella cover (19) in the cavity (2) under the action of the triggering part;
The anchoring device is mounted in place: pre-tensioning the anchor cable (4) to enable the engageable chain (6) to be disengaged, and locking the position of the umbrella-shaped anchor head (7) after the umbrella-shaped anchor head is ensured to be clamped at an anchor hole of the inner wall of the cavity (2) to enter a normal working state;
Grouting: injecting mortar into the anchor holes in batches, so that mortar expansion heads are formed in the range of wrapping the waterproof umbrella surface (19) on the umbrella-shaped anchor heads (7);
tensioning and locking: and tensioning the anchor cable (4) to apply prestress when the strength of the mortar in the anchor hole reaches the design requirement, and locking the anchor cable by using an anchor.
9. A construction method according to claim 8, characterized in that in the grouting step, grouting is started with grouting mortar of lower consistency to flush the inner surface of the waterproof umbrella face (19), then grouting mortar of higher consistency to form the mortar enlarged head, and finally grouting mortar of lower consistency to compact the mortar in the umbrella-shaped anchoring head (7) until the grout overflows from the anchor hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323335.1A CN109267571B (en) | 2018-11-08 | 2018-11-08 | Anchoring device under condition of cavity in slope body and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323335.1A CN109267571B (en) | 2018-11-08 | 2018-11-08 | Anchoring device under condition of cavity in slope body and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109267571A CN109267571A (en) | 2019-01-25 |
| CN109267571B true CN109267571B (en) | 2024-05-14 |
Family
ID=65192478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811323335.1A Active CN109267571B (en) | 2018-11-08 | 2018-11-08 | Anchoring device under condition of cavity in slope body and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109267571B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486566A (en) * | 2019-09-20 | 2019-11-22 | 郑州大学 | Pipe pressurized leak stopping stopping device, Combined joint, pipe pressurized blocking method |
| CN110486567A (en) * | 2019-09-20 | 2019-11-22 | 郑州大学 | Combined joint, pipe pressurized blocking method |
| CN110548970A (en) * | 2019-10-10 | 2019-12-10 | 中冶天工集团天津有限公司 | Argon arc welding internal argon filling protection device and using method |
| CN110984177A (en) * | 2019-12-20 | 2020-04-10 | 中国电建集团成都勘测设计研究院有限公司 | Recyclable quick anchoring anchor rod and construction method thereof |
| CN111733837B (en) * | 2020-07-30 | 2021-07-23 | 四川港航建设工程有限公司 | Rock slope filling and sealing protection system and construction method |
| CN114159707B (en) * | 2021-09-22 | 2022-08-16 | 江苏省华建建设股份有限公司 | Safety fixing device for construction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232936Y (en) * | 1995-12-19 | 1996-08-14 | 李宪奎 | Broaching anchored member |
| CN204080802U (en) * | 2014-08-28 | 2015-01-07 | 南昌工程学院 | A kind of flexible umbrella support anchor rod |
| CN107034882A (en) * | 2017-06-13 | 2017-08-11 | 上海市隧道工程轨道交通设计研究院 | A kind of anchoring system and its application process based on tensioning umbrella anchored end |
| CN107989037A (en) * | 2018-01-17 | 2018-05-04 | 上海智平基础工程有限公司 | A kind of enlarged footing anchor structure |
| CN209082489U (en) * | 2018-11-08 | 2019-07-09 | 兰州理工大学 | There are the anchors under cavity condition in a kind of slopes |
-
2018
- 2018-11-08 CN CN201811323335.1A patent/CN109267571B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232936Y (en) * | 1995-12-19 | 1996-08-14 | 李宪奎 | Broaching anchored member |
| CN204080802U (en) * | 2014-08-28 | 2015-01-07 | 南昌工程学院 | A kind of flexible umbrella support anchor rod |
| CN107034882A (en) * | 2017-06-13 | 2017-08-11 | 上海市隧道工程轨道交通设计研究院 | A kind of anchoring system and its application process based on tensioning umbrella anchored end |
| CN107989037A (en) * | 2018-01-17 | 2018-05-04 | 上海智平基础工程有限公司 | A kind of enlarged footing anchor structure |
| CN209082489U (en) * | 2018-11-08 | 2019-07-09 | 兰州理工大学 | There are the anchors under cavity condition in a kind of slopes |
Non-Patent Citations (1)
| Title |
|---|
| 伞式自扩锚及其在基坑支护中的应用;张继红;《土木工程学报》;第36卷(第8期);第102-108页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109267571A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109267571B (en) | Anchoring device under condition of cavity in slope body and construction method thereof | |
| WO2020238501A1 (en) | Full-assembly pressure-bearing type variable-diameter steel cage expansion head anchor rod pile system | |
| WO2022011913A1 (en) | Prestressed unbonded anchor bolt rebar, anchor bolt, and construction method | |
| KR101329054B1 (en) | Anchor for ground | |
| CN107012956B (en) | Mechanical connecting device between housing industrialization components and using method thereof | |
| CN105626112A (en) | Support device based on built-in type constant-resistance device and use method thereof | |
| CN209082489U (en) | There are the anchors under cavity condition in a kind of slopes | |
| US7695218B2 (en) | Method to increase a capability of soil to sustain loads | |
| CN210562163U (en) | Prefabricated prestressed anchor rod piece | |
| CN104532860A (en) | Recoverable soil nail | |
| CN111926810B (en) | Anchor recyclable anchor rope supporting structure without waist beam and construction method thereof | |
| KR101047085B1 (en) | Pretension soil nail structure with deformed bar, and construction method thereof | |
| KR101039201B1 (en) | Edge extension type rock bolt and construction method of the same | |
| CN213233429U (en) | Full-assembly pressure-bearing type variable-diameter steel reinforcement cage enlarged footing anchor pile system | |
| KR20100029437A (en) | Anchor and anchoring structure using thereof | |
| JP4017766B2 (en) | Hollow cylindrical body and its construction method | |
| CN109024622B (en) | Use method of slope reinforcement rod piece | |
| JP2015034412A (en) | Ground anchor and method of structuring ground anchor | |
| CN111926809B (en) | Waist-beam-free supporting structure for quick construction of pile anchor supporting structure and construction method thereof | |
| KR101165692B1 (en) | Multipurpose anchor and construction method thereof | |
| CN209907406U (en) | Retaining structure for prestressed micro-pile | |
| KR100819504B1 (en) | Connection methodbetween support structure and concrete composite structure using the fiber reinforced polymer | |
| CN103498690A (en) | Double-anchor-cable combination locking device and method thereof | |
| KR102054994B1 (en) | Cylindrical wedge anchor for reinforcing the ground and method for constructing this same | |
| CN109208593B (en) | Device for compensating prestress loss and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |