CN113006061B - A pressure type recoverable anchor cable structure and construction method - Google Patents
A pressure type recoverable anchor cable structure and construction method Download PDFInfo
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- CN113006061B CN113006061B CN202110247245.4A CN202110247245A CN113006061B CN 113006061 B CN113006061 B CN 113006061B CN 202110247245 A CN202110247245 A CN 202110247245A CN 113006061 B CN113006061 B CN 113006061B
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- steel strand
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- 238000010276 construction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 129
- 239000010959 steel Substances 0.000 claims abstract description 129
- 238000004873 anchoring Methods 0.000 claims abstract description 40
- 238000005452 bending Methods 0.000 claims description 85
- 239000011083 cement mortar Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 14
- 230000000149 penetrating effect Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
- E02D2300/0034—Steel; Iron in wire form
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a pressure type recoverable anchor cable structure and a construction method, the pressure type recoverable anchor cable structure comprises an anchoring disc, an anchorage device, a guide cap, a plastic sleeve and a steel strand, wherein the steel strand comprises a U-shaped steel strand and a controllable steel strand, the controllable steel strand penetrates through the U-shaped steel strand, the U-shaped steel strand is fixed on the anchoring disc, the guide cap is fixedly connected with the anchoring disc, and the plastic sleeve is sleeved on the steel strand between the anchoring disc and the anchorage device; the U-shaped steel strand and the controllable steel strand are fixed on the anchoring disc by utilizing the position relation between the U-shaped steel strand and the controllable steel strand, other fixing parts are not needed, the structure is simple, and the operation and construction are convenient; in the construction process, the whole device can be completed only by penetrating the steel strand into the corresponding part, and the construction method is simple and strong in operability; the steel strands are sleeved by the plastic sleeves, so that all the steel strands can be completely recycled; the steel strand can be drawn out only by removing the tension pretightening force during recovery, and the recovery speed is high.
Description
Technical Field
The invention relates to the field of foundation pit supporting anchor cables, in particular to a recoverable anchor cable structure and a construction method.
Background
The prestressed anchor cable is mainly used for supporting an underground foundation pit, and as a temporary supporting measure, a large amount of waste of steel strands is caused by using a permanent anchor cable, meanwhile, building waste is formed to occupy an underground space, and hidden dangers are brought to development and utilization of the urban underground space. The recoverable anchor cable can solve the troublesome problems, so the recoverable anchor cable is a development trend in the field of temporary support in the future.
As early as 90 s in the 20 th century, our country has developed a research on recoverable anchor cable technology for the purpose of reducing underground pollution. At present, there are also a number of anchor cable enterprises and corresponding technical patents in China, where a recoverable anchor cable mainly includes a mechanical recoverable anchor cable, a hot-melt recoverable anchor cable, a mechanical recoverable anchor cable, and the like, for example, chinese patent CN211690329U discloses a mechanical recoverable anchor cable installing and protecting tube device, which includes an anchor cable body, wherein a reinforcing tube is fixedly sleeved on an anchor head of the anchor cable body, the reinforcing tube is arranged toward an inner end of the anchor head of the anchor cable body, a plurality of through holes are formed in a side wall of the reinforcing tube, an inner end of the anchor head of the anchor cable body is flush with a side wall of a wall body, reinforcing rods are transversely arranged on upper and lower sides of an anchor body of the anchor cable body, a fixing block is sleeved on the anchor body of the anchor cable body, and the reinforcing rods are fixedly arranged on the side wall body by the fixing block; for example, chinese patent document CN108018858A discloses a detachable prestressed anchor rope anchorage, wherein a bearing plate is provided with a central through hole and a peripheral tapered hole, the central through hole is communicated with the adjacent peripheral tapered hole through a cavity, a slide block is arranged in the cavity, a clamping piece is sleeved in the peripheral tapered hole, a screw tube and the clamping piece are sleeved in the central through hole, one side of the slide block is provided with a thread groove, the other side of the slide block is provided with an arc groove, the slide block is arranged in the cavity, the thread groove on one side of the slide block is matched with the screw tube, the arc groove on the other side of the slide block is matched with the anchor rope clamping piece, a steel strand in the rotating central through hole drives the screw tube to rotate, the steel strand is withdrawn from the bearing plate and enters an inner chamber of a sealing cap, the vacated space enables the slide block to be gathered towards the center of the bearing plate, the restraint of the steel strand by each anchor rope clamping piece is released, and the steel strand is withdrawn to form recovery. Although the types and construction processes of the recoverable anchor cable are more, the actual recovery rate does not meet the design requirement, wherein the mechanical recoverable anchor cable wastes materials (such as n +1 type) in use due to the particularity of the anchor head device, and the performance of the anchor cable is influenced by the damage of the wire under the condition of lowering the load and the recycling performance.
Disclosure of Invention
The invention aims to provide a pressure type recoverable anchor cable structure and a construction method thereof aiming at the defects of the prior art.
In order to achieve the purpose, the invention provides a pressure type recoverable anchor cable structure and a construction method thereof.
Furthermore, the guide cap is fixed on the anchoring disc to isolate the soil body and protect the anchoring disc and the internal steel strand.
Furthermore, the anchoring disc is in a round cake shape, a protruding cylinder is arranged in the middle of the anchoring disc, a cylindrical hole is formed in the position of the other side, opposite to the protruding cylinder, of the protruding cylinder, the diameter of the cylindrical hole is slightly larger than that of the steel strand and used for the eighth cylindrical section to penetrate through, waist-shaped holes are formed in the upper side and the lower side of the protruding cylinder respectively and used for placing the U-shaped steel strand respectively, the anchoring disc fixes the steel strand to provide anchoring force when in service and provides a channel for recovery when in service recovery is completed.
Furthermore, the two ends of the U-shaped steel strand at the U-shaped end part are inwards contracted and then are parallel downwards, and the controllable steel strand is fixed at the U-shaped bottom of the U-shaped steel strand in the contraction purpose; the U-shaped steel strand bears the anchoring force.
Further, the controllable steel strand comprises a first cylindrical section, a first bending section, a second cylindrical section, a second bending section, a third cylindrical section, a third bending section, a fourth cylindrical section, a fourth bending section, a fifth cylindrical section, a fifth bending section, a sixth cylindrical section, a sixth bending section, a seventh cylindrical section, a seventh bending section and an eighth cylindrical section which are connected in sequence, the bending directions of the first bending section, the second bending section, the third bending section, the fourth bending section and the fifth bending section are consistent, the bending direction of the sixth bending section is opposite to the bending directions of the first bending section, the second bending section, the third bending section, the fourth bending section and the fifth bending section, the bending direction of the seventh bending section is perpendicular to the bending direction of the sixth bending section, and the bending directions of the first cylindrical section, the first bending section, the second cylindrical section, the second bending section, the fourth bending section and the eighth cylindrical section are connected in sequence, The second bending section, the third cylindrical section, the third bending section, the fourth cylindrical section, the fourth bending section, the fifth cylindrical section, the fifth bending section, the sixth cylindrical section, the sixth bending section, the seventh cylindrical section and the seventh bending section are positioned on one side of the anchoring disc, and the eighth cylindrical section is positioned on the other side of the anchoring disc; the controllable steel strand plays a role in recovering the control line.
Furthermore, the U-shaped steel strand comprises a first U-shaped steel strand and a second U-shaped steel strand, the first cylindrical section penetrates through a space formed by bending the first U-shaped steel strand, and the sixth cylindrical section penetrates through a space formed by bending the second U-shaped steel strand.
Furthermore, the plastic sleeve comprises a first plastic sleeve and a second plastic sleeve, the first plastic sleeve is cylindrical and is sleeved outside the eighth cylindrical section, and the section of the second plastic sleeve is waist-shaped and is sleeved outside the U-shaped steel strand; the plastic sleeve is used for isolating the steel strand from cement mortar, soil mass and the like and protecting the steel strand from being corroded.
Furthermore, the third cylindrical section, the third bending section and the fourth cylindrical section are located on a cylinder arranged on the anchoring disc, and the cylinder is arranged in a bending space of the third bending section.
Furthermore, the anchorage device is in a round cake shape, five hollow cylindrical anchor holes are formed in the middle of the anchorage device, the tail ends of the steel strands penetrating out of the anchoring disc are fixed in the five anchor holes respectively, the steel strand corresponding to one anchor hole does not need to be tensioned, and the steel strands are tensioned and fixed through the other four anchor holes.
Further, the construction method for the pressure type recoverable anchor cable structure is as follows:
(1) penetrating the steel strand into a plastic sleeve;
(2) penetrating the steel strand into the anchoring disc;
(3) penetrating the controllable steel strand into the U-shaped steel strand;
(4) fixing a guide cap, and inserting the anchor cable device into the anchor hole;
(5) cement mortar is injected through the reserved grouting pipe, and the anchor head is fixed at the bottom of the anchor hole;
(6) and stretching the U-shaped steel strand and fixing the controllable steel strand at the same time.
Further, the anchor head is a guide cap and an anchor disc fixed connecting piece.
Further, the construction operation steps during the recovery of the anchor cable are as follows:
(1) loosening the anchorage device and removing the tension pretightening force;
(2) drawing out and recovering the controllable steel strand;
(3) and drawing out the U-shaped steel stranded wire.
The invention has the following beneficial effects:
(1) the U-shaped steel strand and the controllable steel strand are fixed on the anchoring disc by utilizing the position relation between the U-shaped steel strand and the controllable steel strand, other fixing parts are not needed, the structure is simple, and the operation and construction are convenient;
(2) in the construction process, the whole device can be completed only by penetrating the steel strand into the corresponding part, and the construction method is simple and strong in operability;
(3) the steel strands are sleeved by the plastic sleeves, so that all the steel strands can be completely recycled;
(4) the steel strand can be drawn out only by removing the tension pretightening force during recovery, and the recovery speed is high.
Drawings
Fig. 1 is an overall structural view of the present invention.
Fig. 2 is a partial view of the anchor plate of the present invention.
Fig. 3 is a partial view of a U-shaped steel strand of the present invention.
Fig. 4 is a partial view of a controllable steel strand according to the invention.
FIG. 5 is a partial view of an anchor of the present invention.
Fig. 6 is a flowchart of the construction method of the present invention.
FIG. 7 shows the construction operation of the present invention during the recovery of the anchor cable
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it should be noted that the embodiments are merely illustrative of the present invention and should not be considered as limiting the invention, and the purpose of the embodiments is to make those skilled in the art better understand and reproduce the technical solutions of the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims.
The invention provides a pressure type recoverable anchor cable structure and a construction method thereof, as shown in figure 1, and the pressure type recoverable anchor cable structure comprises an anchoring disc 1, an anchor device 2, a guide cap 3, a plastic sleeve 4 and steel strands 5, wherein the steel strands 5 comprise U-shaped steel strands 51 and controllable steel strands 52, the controllable steel strands 52 penetrate through the U-shaped steel strands 51, the U-shaped steel strands 51 are fixed on the anchoring disc 1, the guide cap 3 is fixedly connected with the anchoring disc 1, and the plastic sleeve 4 is sleeved on the steel strands 5 between the anchoring disc 1 and the anchor device 2.
Preferably, the guide cap 3 is fixed on the anchoring disc 1 to isolate a soil body and protect the anchoring disc 1 and the internal steel strand;
as shown in fig. 2, the anchoring disc 1 is in a round cake shape, a protruding cylinder 11 is arranged in the middle of the anchoring disc 1, a cylindrical hole 12 is arranged at the other side of the protruding cylinder opposite to the protruding cylinder, the diameter of the cylindrical hole is slightly larger than that of the steel strand, and is used for the eighth cylindrical section to pass through, waist-shaped holes 13 are respectively arranged at the upper side and the lower side of the protruding cylinder 11 and are respectively used for placing the U-shaped steel strand 51, and the anchoring disc 1 fixes the steel strand 5 to provide anchoring force when in service and provides a channel for recovery when in service recovery.
As shown in fig. 3, the U-shaped steel strand 51 is contracted inward at two ends 513 of the U-shaped end part and then is parallel downward, and the controllable steel strand 52 is fixed at the U-shaped bottom of the U-shaped steel strand 51 for the purpose of contraction; the U-shaped steel strand 51 takes on the anchoring force.
As shown in fig. 4, the controllable steel strand includes a first cylindrical section 521, a first curved section 522, a second cylindrical section 523, a second curved section 524, a third cylindrical section 525, a third curved section 526, a fourth cylindrical section 527, a fourth curved section 528, a fifth cylindrical section 529, a fifth curved section 530, a sixth cylindrical section 531, a sixth curved section 532, a seventh cylindrical section 533, a seventh curved section 534, and an eighth cylindrical section 535, which are connected in sequence; the bending directions of the first bent segment 522, the second bent segment 524, the third bent segment 525, the fourth bent segment 528 and the fifth bent segment 530 are identical, the bending direction of the sixth bending section 532 is opposite to the bending direction of the first bending section 522, the second bending section 524, the third bending section 525, the fourth bending section 528 and the fifth bending section 530, the bending direction of the seventh bending section 534 is perpendicular to the bending direction of the sixth bending section 532, the first cylindrical section 521, the first bending section 522, the second cylindrical section 523, the second bending section 524, the third cylindrical section 525, the third bending section 526, the fourth cylindrical section 527, the fourth bending section 528, the fifth cylindrical section 529, the fifth bending section 530, the sixth cylindrical section 531, the sixth bending section 532, the seventh cylindrical section 533 and the seventh bending section 534 are located on one side of the anchor disc 1, and the eighth cylindrical section 535 is located on the other side of the anchor disc 1; the controllable steel strand 52 acts as a recovery control line.
Preferably, the U-shaped steel strand 51 includes a first U-shaped steel strand 511 and a second U-shaped steel strand 512, the first cylindrical section 521 passes through a space formed by bending the first U-shaped steel strand 511, and the sixth cylindrical section 531 passes through a space formed by bending the second U-shaped steel strand 512.
In some preferred embodiments, the protruding cylinder is used to fix the third curved section 526.
Preferably, the plastic sleeve 4 comprises a first plastic sleeve 41 and a second plastic sleeve 42, the first plastic sleeve 41 is cylindrical and is sleeved outside the eighth cylindrical section 535, and the second plastic sleeve 42 is waist-shaped in cross section and is sleeved outside the U-shaped steel strand 51; the plastic sleeve 4 isolates the steel strand from cement mortar, soil bodies and the like, and protects the steel strand from being corroded.
As shown in fig. 5, the anchor device 2 is in a round cake shape, five hollow cylindrical anchor holes are formed in the middle of the anchor device 2, the tail ends of the steel strands penetrating out of the anchor disc are fixed in the five anchor holes respectively, the steel strand corresponding to one anchor hole does not need to be tensioned, and the steel strands are tensioned and fixed in the other four anchor holes.
As shown in fig. 6, the construction method for any one of the above-mentioned pressure-type recoverable anchor cable structures is as follows:
s1, penetrating the steel strand into a plastic sleeve, wherein the U-shaped steel strand penetrates into a first plastic sleeve, and the controllable steel strand penetrates into a second plastic sleeve with a waist-shaped section;
s2, penetrating the steel strand into the anchoring disc, wherein the U-shaped steel strand penetrates into the kidney-shaped hole, and the eighth cylindrical section of the controllable steel strand penetrates into the cylindrical hole;
s3, penetrating the controllable steel strand into the U-shaped steel strand, wherein the first cylindrical section penetrates through the bending space of the first U-shaped steel strand, and the sixth cylindrical section penetrates through the bending space of the second U-shaped steel strand;
s4, fixing the guide cap, and inserting the anchor cable device into the anchor hole;
s5, cement mortar is injected through the reserved grouting pipe, and an anchor head is fixed at the bottom of the anchor hole, wherein the anchor head is a guide cap and anchor disc fixing connecting piece;
and S6, stretching the U-shaped steel strand and fixing the controllable steel strand at the same time.
As shown in fig. 7, the construction operation steps during the anchor cable recovery are as follows:
s1, loosening the anchorage device, and removing tension pretightening force;
s2, drawing out and recovering the controllable steel strand;
and S3, drawing out the U-shaped steel stranded wire.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247245.4A CN113006061B (en) | 2021-03-05 | 2021-03-05 | A pressure type recoverable anchor cable structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247245.4A CN113006061B (en) | 2021-03-05 | 2021-03-05 | A pressure type recoverable anchor cable structure and construction method |
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| CN113006061A CN113006061A (en) | 2021-06-22 |
| CN113006061B true CN113006061B (en) | 2021-11-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5313594A (en) * | 1993-01-11 | 1994-07-14 | Vsl International Ag | Stressing anchorage for at least one tension element running inside an encasing tube and method of producing the stressing anchorage |
| CN200964593Y (en) * | 2006-11-01 | 2007-10-24 | 中国人民解放军总参谋部工程兵科研三所 | Recoverable prestressed anchor cable |
| CN201809768U (en) * | 2010-03-23 | 2011-04-27 | 中建三局建设工程股份有限公司 | Recyclable pre-stressing anchor rope with U-shaped anchoring head |
| CN108018858A (en) * | 2017-12-14 | 2018-05-11 | 上海智平基础工程有限公司 | A kind of detachable prestressed anchor cable anchorage |
| CN211690329U (en) * | 2020-01-17 | 2020-10-16 | 山西冶金岩土工程勘察有限公司 | Mechanical recoverable anchor cable additionally-installed protective pipe device |
-
2021
- 2021-03-05 CN CN202110247245.4A patent/CN113006061B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5313594A (en) * | 1993-01-11 | 1994-07-14 | Vsl International Ag | Stressing anchorage for at least one tension element running inside an encasing tube and method of producing the stressing anchorage |
| CN200964593Y (en) * | 2006-11-01 | 2007-10-24 | 中国人民解放军总参谋部工程兵科研三所 | Recoverable prestressed anchor cable |
| CN201809768U (en) * | 2010-03-23 | 2011-04-27 | 中建三局建设工程股份有限公司 | Recyclable pre-stressing anchor rope with U-shaped anchoring head |
| CN108018858A (en) * | 2017-12-14 | 2018-05-11 | 上海智平基础工程有限公司 | A kind of detachable prestressed anchor cable anchorage |
| CN211690329U (en) * | 2020-01-17 | 2020-10-16 | 山西冶金岩土工程勘察有限公司 | Mechanical recoverable anchor cable additionally-installed protective pipe device |
Non-Patent Citations (1)
| Title |
|---|
| 浆囊袋压力型土钉新技术及工作机理研究;张旭辉等;《岩体工程学报》;20141130;第36卷(第增2期);第227-232页 * |
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