CN110747853A - Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod - Google Patents
Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod Download PDFInfo
- Publication number
- CN110747853A CN110747853A CN201910898750.8A CN201910898750A CN110747853A CN 110747853 A CN110747853 A CN 110747853A CN 201910898750 A CN201910898750 A CN 201910898750A CN 110747853 A CN110747853 A CN 110747853A
- Authority
- CN
- China
- Prior art keywords
- rod
- pressure
- anchor
- hollow
- resistant
- 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.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
Abstract
The invention relates to a method for removing a steel bar body in a multi-rod anchor cable and a special hollow pressure-resistant rod, belonging to the technical field of removal of foundation anchoring parts. Aiming at an anchor rod body formed by a steel bar body with a length marking sheath and a multi-rod anchor cable formed by more than two anchor rod bodies which are close to each other, when at least one steel bar body of the multi-rod anchor cable is dismantled and an empty sheath is left, the method firstly determines the distance from an anchoring section of the anchor cable under the ground to the ground; selecting a customized water jet cutter mechanism, and determining a hollow pressure-resistant rod and a nozzle at the front end of the hollow pressure-resistant rod according to the inner diameter and the distance of the residual empty sheath; and pushing the hollow pressure-resistant rod from the residual empty sheath to the anchoring section, starting the water jet cutter mechanism, adjusting and spraying high-pressure liquid by rotating the pressure-resistant rod to cut and wear the reinforcement body of the anchor rod body which is not removed until the reinforcement body is removed, and storing the sprayed liquid in a pre-washed dark hole near the anchoring section and permeating into the peripheral stratum.
Description
Technical Field
The invention relates to a method for removing a steel bar body in a multi-rod anchor cable, belonging to the technical field of removal of a foundation anchoring part.
Background
Anchor cables (or bolts) are a common anchoring member used in infrastructure construction, and are widely used in cities in particular. Such as large-scale buildings, subway sections, subway stations or underground garages, etc. However, these bolts, which are widely used in construction, often face the problem of being dismantled after the construction is completed or in new construction facilities. In the face of cutting an existing underground anchor rod, a reinforcing steel bar body in an anchor rod body of an anchor cable, such as a hot-melt anchor cable, which can be automatically dismantled, is widely adopted at present. However, there are still a large number of non-self-releasable anchor lines left over from previous construction work, and there are also problems with self-releasable anchor lines that are subject to removal failure or partial failure.
Chinese patent application document (publication No. CN 106049495A) a special apparatus for cutting an anchor rod for an underground construction and a construction method thereof, which discloses a method of exposing a reinforcing bar body deeply buried in an underlying anchor rod by digging a guide groove downward on the ground and then cutting the exposed reinforcing bar body. However, the device and the method of the patent are not suitable for narrow occasions where the guide groove cannot be excavated from the ground, and most of the anchor rods which need to be removed are in the narrow occasions where the guide groove cannot be excavated. Similarly, the chinese patent application No. 201811072860.0 also discloses a method for removing the reinforcing body of an anchor rod in a rock-soil stratum, which comprises the steps of drilling a drill rod into the position of the underground anchoring section, and then cutting the reinforcing body of the anchor rod by abrasion through a drill bit with a grinding body; it still cannot be adapted to narrow occasions. Furthermore, chinese patent application publication No. CN 108166491A discloses a method for removing a steel bar body in an anchor cable, which is a method for removing a single-strand steel bar body through a hollow channel, especially for a special steel bar body in which a single-strand steel bar body in a single sheath is formed by twisting a plurality of side wires around a hollow channel or a special steel bar body formed by twisting a hollow-channel-containing middle wire and a plurality of side wires. However, for a general reinforcing body without a special hollow channel, especially for a cable in which a plurality of reinforcing bodies and sheaths thereof form a plurality of rods, the method cannot realize the removal of the reinforcing body.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method can be used for dismantling the underground existing anchor rod body, and particularly can be used for dismantling the steel bar body in the anchor rod body which is not yet dismantled under the condition that the removed steel bar body and the residual empty sheath exist in the multi-rod-body anchor cable.
The technical scheme provided by the invention for solving the technical problems is as follows: a method of removing a tendon in a multi-shank anchor cable, said tendon having a jacket and comprising anchor shank portions, more than two of said anchor shank portions being adjacent to each other to form said multi-shank anchor cable, said jacket having length markings on its surface, the following steps being performed for at least one of said anchor shank portions in a unitary bore of said anchor cable when said tendon has been removed and an empty jacket remains:
(1) determining the distance from the anchoring section of the anchor cable under the ground to the ground according to the length mark and the previous construction record of the anchor cable;
(2) selecting a customized water jet cutter mechanism, wherein the water jet cutter mechanism comprises a hollow pressure-resistant rod and a high-pressure pump, a nozzle is arranged at the front end of the hollow pressure-resistant rod, the rear end of the hollow pressure-resistant rod is connected with a rotary joint, and the rotary joint is connected with an output port of the high-pressure pump; determining the length and the outer diameter of the hollow pressure-resistant rod and the outer diameter of the nozzle according to the distance and the inner diameter of the hollow sheath, wherein the length of the hollow pressure-resistant rod is greater than or equal to the distance, and the outer diameters of the hollow pressure-resistant rod and the nozzle are smaller than the inner diameter of the hollow sheath;
(3) inserting the hollow pressure-resistant rod and the nozzle into the residual empty sheath and pushing the hollow pressure-resistant rod and the nozzle to the anchoring section, wherein the pushing length is basically consistent with the distance;
(4) when the nozzle is pushed to a position close to the anchoring section, the high-pressure pump is started, first high-pressure water is sprayed to cut and break the hollow sheath and the concrete layer around the anchoring section, then the hollow pressure-resistant rod is rotated to enable the nozzle to spray second high-pressure water towards the direction of the anchor rod body of the anchor rope, wherein the steel rod body is not removed, so that the soil layer exposed out of the anchoring section is flushed to form a channel from the nozzle to the anchor rod body, wherein the steel rod body is not removed;
(5) forming a cavern area in the soil layer on the side surface of the passage;
(6) then, rotating the hollow pressure-resistant rod to enable the nozzle to face the channel and aim at the jacket of the anchor rod body without the steel bar body and the steel bar body thereof to continuously spray fourth high-pressure water until the jacket of the anchor rod body without the steel bar body and the steel bar body thereof are cut, worn and removed; and the sprayed water enters the cavern area to be accumulated and gradually permeates to the soil layer outside the cavern area.
Further, before the step (1) or in the step (6), applying a tensile force to the steel bar body in the sheath of the anchor rod body which is not removed in the anchor cable.
The improvement is that: the hollow pressure-resistant rod is in a spiral shape before entering the hollow sheath; the high pressure water contains abrasive.
The method of the invention is especially for the current anchor cable that a plurality of anchor rod bodies are mutually connected in a close way to form an integral multi-rod body anchor cable structure by a fixing frame and the like, and for the situation that the steel bar body in the sheath of at least one anchor rod body in the multi-rod body anchor cable structure is already removed, the method has the advantages that: the hollow pressure-resistant rod of the water jet cutter mechanism is directly inserted into the empty sheath left after the steel bar body is removed, the diameter and the length of the hollow pressure-resistant rod are reasonably selected and customized, and a hole (underground dark hole) for subsequent water discharging and grinding materials is formed in the soil layer by firstly destroying the concrete layer at the underground deep-buried anchoring part, so that the steel bar body in other anchor bar bodies which are not removed in the multi-bar anchor structure is cut, worn and broken to be removed. It is worth mentioning that the invention not only utilizes the residual empty sheath as the inlet channel of the hollow pressure-resistant rod, but also utilizes the characteristics that the soil layer can be extruded and the water is easy to permeate in the soil layer, and skillfully constructs a dark hole around the anchoring section of the anchor rod body at the deep underground to store the subsequent abrasive and the water, thereby practically realizing the continuous high-pressure jet cutting abrasion of the steel bar body at the anchoring position at the deep underground without dismantling the anchor rod body sheath. Furthermore, by applying a pulling force to the shank body in or before the cutting of the worn-out shank body, the shank body of the shank body can be removed more quickly.
It should be noted that, because the inner diameter of the channel of the remaining empty sheath after the existing steel bar body is removed is small (the diameter of the existing anchor rod body is generally less than 15mm), the existing water jet cutting mechanism cannot be directly applied to the implementation of the method of the present invention, and special customization is required (such as the size, material and surface treatment and the like of the hollow pressure-resistant rod and the nozzle). Therefore, even if the ordinary engineer faces the remaining hole sheath after the anchor rod body is removed, the engineer does not think of using the remaining hole sheath as a passage for the water jet drill rod.
In the method, in order to ensure that the nozzle effectively and continuously forms different-angle spraying, the invention also designs the special hollow pressure-resistant rod as follows: a hollow pressure-resistant rod for removing a reinforcement body in a multi-rod anchor cable is formed by welding hollow pressure-resistant rods in sections, a nozzle is welded with the front end of the hollow pressure-resistant rod, a conical part is arranged on the outer wall of the front end of the hollow pressure-resistant rod, and an elastic sealing ring is sleeved on the outer wall of the hollow pressure-resistant rod of the conical part; in the execution of the method, the elastic sealing ring is positioned and fills the gap between the outer wall of the hollow pressure-resistant rod and the inner wall of the hollow jacket. By adopting the special hollow pressure-resistant rod, in the method step of removing the steel bar body in the multi-rod body anchor cable, when the high-pressure water contains the abrasive, the elastic sealing ring for filling the gap between the outer wall of the hollow pressure-resistant rod and the inner wall of the hollow sheath can effectively prevent the abrasive in the high-pressure water from forming accumulation and blockage in the gap between the outer wall of the pressure-resistant rod and the inner wall of the hollow sheath, thereby effectively avoiding the pressure-resistant rod from being blocked and locked by the accumulated abrasive in the rotation process, and further ensuring the free rotation of the pressure-resistant rod and the free adjustment of the angle of the nozzle.
In addition, the outer wall of the hollow pressure-resistant rod of the conical part can be sleeved with a buckle attached to the side face of the elastic sealing ring.
Drawings
The method for removing the reinforcement body in the multi-rod anchor cable according to the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a multi-rod anchor cable according to a first embodiment of the present invention.
Figure 2 is a cross-sectional view of the bolt body of figure 1 with the reinforcement body not removed.
Figure 3 is a cross-sectional view of the bolt body of figure 1 with the reinforcement body removed.
FIG. 4 is an enlarged view of a portion A of the hollow pressure-resistant rod end portion entered in step (4) of the embodiment.
Fig. 5 is a schematic structural view of a multi-rod anchor cable of the water knife opening mechanism in step (4) of the embodiment.
Fig. 6 is an enlarged view of a portion B in fig. 5.
Fig. 7 is a partial structural schematic view of the hollow compression-resistant rod.
Fig. 8 is a sectional view taken along line a-a in fig. 7.
Fig. 9 is a partial structural view of the hollow pressure-resistant rod inserted into the hollow sheath.
Fig. 10 is a schematic view of the abrasive material packed in fig. 9.
Fig. 11 is a simplified structural schematic diagram of a multi-rod anchor cable according to a second embodiment of the present invention.
FIG. 12 is a schematic diagram of a first application scenario of the embodiment of the present invention in an actual construction situation.
FIG. 13 is a diagram illustrating a second application scenario of the embodiment of the present invention in an actual construction situation.
FIG. 14 is a diagram illustrating a third application scenario of the embodiment of the present invention in an actual construction situation.
Detailed Description
Example one
In the method for removing the steel bar body in the multi-rod anchor cable of the embodiment, the steel bar body is provided with the sheath and forms the anchor rod body, more than two anchor rod bodies are close to each other to form the multi-rod anchor cable, the sheath refers to the sheath with the length mark on the surface, and the length mark is generally formed by engraving or printing on the surface of the sheath when a manufacturer manufactures the anchor rod body.
As shown in fig. 1, the embodiment exemplifies a multi-rod anchor cable 2 formed by five anchor rods (1-1, 1-2, 1-3, 1-4 and 1-5, respectively) adjacent to each other, wherein the anchor rods 1-1 and 1-2 are fixed to each other by being inserted into the same integral bearing plate 3-1, the anchor rods 1-3 and 1-4 are fixed to each other by being inserted into the same integral bearing plate 3-2, and the anchor rods 1-5 are inserted into the integral bearing plate 3-3. In this embodiment, the sheaths are PE plastic tubes, as shown in figure 2, with a tendon body inside each of the bolt body sheaths. The multi-rod anchor cable 2 is arranged in the integral anchor hole 4, the space in the anchor hole 4 except the anchor rod body is filled with a concrete layer, as can be seen from figure 1, the steel bar bodies in the anchor rod bodies 1-1, 1-2, 1-3 and 1-5 are already removed, but the steel bar bodies of the rest anchor rod bodies 1-4 are not removed (difficult to remove). Thus by the removed anchor rod body 1-2 being close to the anchor rod body 1-4 leaving an empty sheath, the following steps are performed:
(1) the distance between the anchoring section of the multi-rod cable and the ground is determined according to the length marks of the jacket surfaces of the anchor rods 1-4 and the previous construction records of the multi-rod cable, for example, the distance between the anchoring section of the anchor rods 1-4 and the ground is 22 meters through verification in the embodiment.
(2) Selecting a customized water jet cutter mechanism, wherein the water jet cutter mechanism comprises a hollow pressure-resistant rod 5 and a high-pressure pump 7-1, a nozzle 6 is arranged at the front end of the hollow pressure-resistant rod 5, the rear end of the hollow pressure-resistant rod is connected with a rotary joint 7-2, and the rotary joint 7-2 is connected with an output port of the high-pressure pump 7-1; the rotary joint 7-2 adopts a single-channel high-speed rotary joint of model MG012000 produced by Shenzhen Xinderli electromechanical equipment Limited. And determining the length and the outer diameter of the hollow pressure-resistant rod 5 and the outer diameter of the nozzle 6 according to the distance of 22 meters and the inner diameter of the residual hollow sheath after the anchor rod body 1-2 is removed. The inner diameter of the anchor rod sheath illustrated in this embodiment is 13mm (mm), so that the diameter of the hollow pressure-resistant rod 5 is determined to be 11mm, and the length of the hollow pressure-resistant rod 5 is determined to be 23 m according to the above-mentioned distance of 22 m, and the outlet of the nozzle installed at the front end of the hollow pressure-resistant rod 5 forms an angle with the length direction of the hollow pressure-resistant rod 5 (as shown in fig. 4), and the angle ranges from 0 to 90 degrees. In the hollow pressure-resistant rod 5 in the embodiment, each section of the hollow pressure-resistant rod 5 is welded in a segmented manner, and the front end of the hollow pressure-resistant rod 5 and the nozzle 6 are welded to ensure pressure resistance and meet the environmental requirement of small aperture. The hollow pressure-resistant rod 5 is in a spiral shape before entering the residual empty sheath, so that the hollow pressure-resistant rod 5 can adapt to a narrow space and is favorable for controlling the length of the hollow pressure-resistant rod 5 entering the residual empty sheath and fixing the hollow pressure-resistant rod.
(3) The hollow pressure-resistant rod 5 and the nozzle 6 are inserted into the remaining empty sheath and pushed towards the anchoring section (as shown in fig. 4), the pushing length being substantially the same as the distance of 22 meters.
(4) As shown in fig. 5, when the hollow pressure-resistant rod 5 is pushed to the position of the anchoring section (i.e. the hollow pressure-resistant rod enters the remaining hollow sheath to reach approximately 22 meters), the high-pressure pump 7-1 of the water jet mechanism is started, first high-pressure water (which may contain abrasive, such as ore sand or metal sand, etc., and has a water pressure of about 50 mpa) is jetted through the nozzle 6, and the nozzle 6 jets the high-pressure water or the high-pressure water containing abrasive to cut and crack the concrete layer around the remaining hollow sheath and the anchoring section; then, the hollow pressure-resistant rod 5 is rotated to make the nozzle 6 jet second high-pressure water (water only or water containing abrasive, water pressure is about 50 mpa) towards the anchor rod body 1-4 of the multi-rod anchor cable without removing the steel bar body, so as to flush the exposed soil layer around the anchoring section (i.e. the high-pressure water jetted by the nozzle can directly contact the soil layer after the concrete layer and the sheath are cut and broken) to form a channel 12 (as shown in fig. 6) from the nozzle 6 to the anchor rod body 1-4 of the multi-rod anchor cable without removing the steel bar body.
(5) The hollow pressure resistant rod 5 is rotated so that the nozzle 6 sprays a third high pressure water (water only without abrasive, water pressure about 20 mpa or so) toward the soil layer on the side of the passage 12 to wash it for forming a cavernous region 8 in the soil layer around the anchored section (as shown in fig. 6).
The embodiment provides that the cavern area 8 is formed by spraying high-pressure water, and the cavern area 8 can be formed by blasting or strongly pulling the anchor rod bodies 1-4.
(6) Then, the hollow pressure-resistant rod 5 is rotated to enable the nozzle 6 to face the channel 12 and align with the sheaths of the anchor rod bodies 1-4 without the steel bar bodies and the steel bar bodies thereof to continuously spray fourth high-pressure water (only water or abrasive materials containing mineral sand or metal sand and the like, the water pressure is about 50 MPa) to cut and wear the sheaths of the anchor rod bodies 1-4 without the steel bar bodies and the steel bar bodies thereof until the sheaths of the anchor rod bodies 1-4 without the steel bar bodies and the steel bar bodies thereof are cut and worn to be broken and removed, and the sprayed water (the abrasive materials containing) enters the cave area 8 to be accumulated and gradually permeate into the surrounding soil layer outside the cave area 8.
In this embodiment, before step (1) or in step (6), 10-30 tons of tension may be applied to the steel reinforcement body in the sheath of the anchor rod body 1-4, so that the steel reinforcement body in the sheath of the anchor rod body 1-4 is broken rapidly and is removed as soon as possible.
In order to ensure that the nozzle effectively and continuously forms the spray at different angles in the implementation of the method, the embodiment further designs a special hollow pressure-resistant rod as shown in fig. 7, the hollow pressure-resistant rod 5 is formed by welding in sections, the nozzle 6 is welded with the front end of the hollow pressure-resistant rod 5, the outer wall of the front end of the hollow pressure-resistant rod is provided with a conical part 13, and the outer wall of the hollow pressure-resistant rod 5 of the conical part 13 is sleeved with an elastic sealing ring 14.
In the steps (4), (5) and (6) performed by the method, as shown in fig. 9, the high-pressure water flows upward from the gap between the outer wall of the hollow pressure-resistant rod 5 and the inner wall of the hollow sheath 15, and the elastic sealing ring 14 is moved upward to be located and fill the gap between the outer wall of the hollow pressure-resistant rod 5 and the inner wall of the hollow sheath 15. When the high-pressure water contains the abrasive, as shown in fig. 10, the elastic sealing ring 14 can effectively prevent the abrasive in the high-pressure water from accumulating and blocking in the gap between the outer wall of the pressure-resistant rod 5 and the inner wall of the hollow sheath 15, so that the pressure-resistant rod 5 is effectively prevented from being blocked and locked by the accumulated abrasive during rotation, and the free rotation of the pressure-resistant rod 5 and the free angle adjustment of the nozzle 6 are further ensured.
As shown in fig. 7 and 8, two C-shaped clips 16 are further sleeved on the outer wall of the hollow pressure-resistant rod 5 of the tapered portion 13, and the C-shaped clips are respectively abutted against two side surfaces of the elastic sealing ring 14. Of course, a single C-clip 16 may or may not be used. Of course, the C-shaped buckle can be replaced by an annular buckle or other buckles.
Example two
As shown in fig. 10, in the present embodiment, a pair of anchor rod bodies 10 and 11 pass through a pressure bearing plate 9, wherein the anchor rod body 10 has been removed with a reinforcement body and an empty sheath remains, the reinforcement body 11 has not been removed, a hole area 8 is also formed around the anchoring section of the anchor rod body 10 in the same manner as in the first embodiment, and then construction is performed in the same manner as in the first embodiment, and detailed steps are not repeated.
The specific practical application scenarios of the method for detaching the anchor rod body according to the above embodiment are shown in fig. 11, 12 and 13, and there are three scenarios.
Scenario one is shown in fig. 11: the method belongs to the first treatment, after the anchor rod body is tensioned and locked, the anchor rod body cannot be recovered, at the moment, the earth is not excavated, the working surface is wide, and the cutting can be conveniently carried out;
scenario two is shown in fig. 12: belonging to post-treatment, the construction method is carried out in a narrow space between the outer wall of the basement of the building and a fender post, and a hollow compression-resistant rod 5 is pushed into a hollow sheath in a bending mode;
scenario three is shown in fig. 13: the narrow space between the outer wall of the basement and the fender post of the building can not be operated, a hole can be formed in the outer wall of the basement, the hole is aligned to the direction of the anchor hole of the anchor rod body, and the hollow pressure-resistant rod 5 penetrates through the hole in the outer wall of the basement and then is pushed into the hollow sheath.
For example, in the step (4), the explosive is provided at the end of the hollow pressure-resistant rod 5 to blast the exposed soil layer around the anchoring section to form the hole area 8 by loose compression of the soil layer, or the hole area 8 is formed by loose compression of the soil layer by strongly pulling the pressure-bearing plate 3-2 of the undetached anchor rod body 1-4. For another example, a specially designed jaw mechanism may be further disposed at the end of the hollow pressure-resistant rod 5 close to the nozzle 6, and when the hollow pressure-resistant rod 5 is pushed to the anchoring section, the jaw mechanism may be controlled to clamp the surrounding concrete layer and soil layer. All equivalents and modifications of the inventive concept and its technical solutions are intended to be included within the scope of the present invention.
Claims (7)
1. A method of removing a tendon in a multi-shank anchor cable, the tendon having a jacket and comprising anchor shank portions, two or more of the anchor shank portions being adjacent to each other to form the multi-shank anchor cable, the jacket having a length marking on a surface thereof, the method comprising the steps of, for at least one of the anchor shank portions of the anchor cable in an integral anchor bore, when the tendon has been removed and an empty jacket remains:
(1) determining the distance from the anchoring section of the anchor cable under the ground to the ground according to the length mark and the construction record of the anchor cable;
(2) selecting a customized water jet cutter mechanism, wherein the water jet cutter mechanism comprises a hollow pressure-resistant rod and a high-pressure pump, a nozzle is arranged at the front end of the hollow pressure-resistant rod, the rear end of the hollow pressure-resistant rod is connected with a rotary joint, and the rotary joint is connected with an output port of the high-pressure pump; determining the length and the outer diameter of the hollow pressure-resistant rod and the outer diameter of the nozzle according to the distance and the inner diameter of the hollow sheath, wherein the length of the hollow pressure-resistant rod is greater than or equal to the distance, and the outer diameters of the hollow pressure-resistant rod and the nozzle are smaller than the inner diameter of the hollow sheath;
(3) inserting the hollow pressure-resistant rod and the nozzle into the residual empty sheath and pushing the hollow pressure-resistant rod and the nozzle to the anchoring section, wherein the pushing length is basically consistent with the distance;
(4) when the nozzle is pushed to a position close to the anchoring section, the high-pressure pump is started, first high-pressure water is sprayed to cut and break the hollow sheath and the concrete layer around the anchoring section, then the hollow pressure-resistant rod is rotated to enable the nozzle to spray second high-pressure water towards the direction of the anchor rod body of the anchor rope, wherein the steel rod body is not removed, so that the soil layer exposed out of the anchoring section is flushed to form a channel from the nozzle to the anchor rod body, wherein the steel rod body is not removed;
(5) forming a cavern area in the soil layer on the side surface of the passage;
(6) then, rotating the hollow pressure-resistant rod to enable the nozzle to face the channel and aim at the jacket of the anchor rod body without the steel bar body and the steel bar body thereof to continuously spray fourth high-pressure water until the jacket of the anchor rod body without the steel bar body and the steel bar body thereof are cut, worn and removed; and the sprayed water enters the cavern area to be accumulated and gradually permeates to the soil layer outside the cavern area.
2. The method for removing the reinforcement body in the multi-rod anchor cable according to claim 1, wherein: applying a tensile force to the reinforcement body in the sheath of the anchor rod body that is not removed in the anchor line, either before step (1) or in step (6).
3. The method for removing the reinforcement body in the multi-rod anchor cable according to claim 1, wherein: in the step (5), the nozzle sprays third high-pressure water towards the soil layer on the side surface of the passage by rotating the hollow pressure-resistant rod to form the cavernous region.
4. A method of dismantling a tendon in a multi-rod cable as claimed in claim 1, 2 or 3 in which: the high pressure water contains an abrasive.
5. A hollow pressure-resistant rod for use in the method of claim 1, the hollow pressure-resistant rod being formed by welding in sections, the nozzle being welded to a front end of the hollow pressure-resistant rod, characterized in that: the outer wall of the front end of the hollow pressure-resistant rod is provided with a conical part, and an elastic sealing ring is sleeved on the outer wall of the hollow pressure-resistant rod of the conical part; in the execution of the method, the elastic sealing ring is positioned and fills a gap between the outer wall of the hollow pressure-resistant rod and the inner wall of the hollow jacket.
6. The method of claim 1 or the hollow compression resistant shaft of claim 5, wherein: the hollow pressure-resistant rod is in a spiral shape before entering the hollow sheath.
7. The hollow compression resistant shaft of claim 5, wherein: the outer wall of the hollow pressure-resistant rod of the conical part is further sleeved with a buckle, and the buckle is attached to the side face of the elastic sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898750.8A CN110747853B (en) | 2019-09-23 | 2019-09-23 | Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898750.8A CN110747853B (en) | 2019-09-23 | 2019-09-23 | Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110747853A true CN110747853A (en) | 2020-02-04 |
| CN110747853B CN110747853B (en) | 2021-04-02 |
Family
ID=69276853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910898750.8A Active CN110747853B (en) | 2019-09-23 | 2019-09-23 | Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110747853B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483145A (en) * | 2020-12-16 | 2021-03-12 | 河南理工大学 | High-pressure water jet anchor-releasing and anchor-releasing equipment and anchor-releasing method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2822177A1 (en) * | 2001-03-15 | 2002-09-20 | Freyssinet Int Stup | Anchoring system for pre-stressed reinforcing cables comprises block with holes for cables running in opposite directions and thrust surface for structure |
| CN203475427U (en) * | 2013-07-26 | 2014-03-12 | 张继红 | Self-drilling type recoverable anchor rod |
| CN104895347A (en) * | 2015-06-12 | 2015-09-09 | 河南理工大学 | Separation device and method of reinforcing steel bars in construction garbage |
| CN106049495A (en) * | 2016-06-08 | 2016-10-26 | 山东大学 | Special device used for underground engineering anchor cable cutting and construction method of special device |
| CN206105050U (en) * | 2016-02-15 | 2017-04-19 | 纪新刚 | Mining anchor rope cutterbar |
| CN108166491A (en) * | 2017-12-06 | 2018-06-15 | 苏州市能工基础工程有限责任公司 | The method for dismounting of steel strand wires in anchor cable |
| CN110038984A (en) * | 2019-04-24 | 2019-07-23 | 辽宁艾热机电科技有限公司 | A kind of anchor cable dismounting Water Cutting auxiliary device |
| CN110258553A (en) * | 2019-07-10 | 2019-09-20 | 李小川 | A kind of method and construction tool for removing pull rod in soil |
-
2019
- 2019-09-23 CN CN201910898750.8A patent/CN110747853B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2822177A1 (en) * | 2001-03-15 | 2002-09-20 | Freyssinet Int Stup | Anchoring system for pre-stressed reinforcing cables comprises block with holes for cables running in opposite directions and thrust surface for structure |
| CN203475427U (en) * | 2013-07-26 | 2014-03-12 | 张继红 | Self-drilling type recoverable anchor rod |
| CN104895347A (en) * | 2015-06-12 | 2015-09-09 | 河南理工大学 | Separation device and method of reinforcing steel bars in construction garbage |
| CN206105050U (en) * | 2016-02-15 | 2017-04-19 | 纪新刚 | Mining anchor rope cutterbar |
| CN106049495A (en) * | 2016-06-08 | 2016-10-26 | 山东大学 | Special device used for underground engineering anchor cable cutting and construction method of special device |
| CN108166491A (en) * | 2017-12-06 | 2018-06-15 | 苏州市能工基础工程有限责任公司 | The method for dismounting of steel strand wires in anchor cable |
| CN110038984A (en) * | 2019-04-24 | 2019-07-23 | 辽宁艾热机电科技有限公司 | A kind of anchor cable dismounting Water Cutting auxiliary device |
| CN110258553A (en) * | 2019-07-10 | 2019-09-20 | 李小川 | A kind of method and construction tool for removing pull rod in soil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483145A (en) * | 2020-12-16 | 2021-03-12 | 河南理工大学 | High-pressure water jet anchor-releasing and anchor-releasing equipment and anchor-releasing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110747853B (en) | 2021-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1959057A2 (en) | Equipment and method for constructing micropiles in soil, in particular for the anchorage of active anchors | |
| EP2115338B1 (en) | Method for laying pipes in the ground | |
| JP4745926B2 (en) | Partial double pipe type rock bolt construction method | |
| CN104895072B (en) | A kind of prestress anchorage cable and prestress anchorage cable one-pass molding construction method | |
| KR20070003850A (en) | Single pass drilling apparatus, use a one-piece drill bit, method and rock bolt for single pass rock bolting | |
| CN210918889U (en) | Reinforced cement anchor rod | |
| CN108643193B (en) | Drilling and pulling method for prestressed anchor cable of foundation pit support | |
| CN203891016U (en) | Self-propelled anchor cable and construction device thereof | |
| CN110747853B (en) | Method for removing steel bar body in multi-rod anchor cable and special pressure-resistant rod | |
| EP1888878B1 (en) | Method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material | |
| EP1818499B1 (en) | Apparatus for simultaneously drilling and casing boreholes | |
| JP3974090B2 (en) | Long face bolt construction method | |
| JP5965778B2 (en) | Long mirror bolt method | |
| JP3878104B2 (en) | Construction method of double pipe digging rock bolt using drilling rod | |
| US20020071726A1 (en) | Tool and apparatus incorporating the same and method for constructing cylindrical columns and wall using the same | |
| JP2009068229A (en) | Method of burying anchor for suspended structure | |
| JP5875849B2 (en) | Injection stirring ground improvement method | |
| EP1635098B1 (en) | Method and flushing head for uncovering underground installations | |
| CN113669090B (en) | Anchor rod construction process | |
| DE19808478C2 (en) | Process for trenchless laying of pipes | |
| JP2018083287A (en) | Boring method using water jet device | |
| CN114382083A (en) | Grouting reinforcement construction method and surface construction method | |
| JP6280416B2 (en) | Water jet equipment | |
| JP3755472B2 (en) | Ground improvement method | |
| JP4383368B2 (en) | How to install a girder member in the ground between two tunnels |
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 |