CN111851485B - Steel strand diffusion device and anchor cable system using same - Google Patents
Steel strand diffusion device and anchor cable system using same Download PDFInfo
- Publication number
- CN111851485B CN111851485B CN202010825625.7A CN202010825625A CN111851485B CN 111851485 B CN111851485 B CN 111851485B CN 202010825625 A CN202010825625 A CN 202010825625A CN 111851485 B CN111851485 B CN 111851485B
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- steel strand
- movable ring
- diffusion
- sleeve
- connecting rod
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- 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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- 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 steel strand diffusion device which comprises a hollow sleeve, wherein a first movable ring is arranged on the outer peripheral side of the upper section of the sleeve in a penetrating manner, and a first connecting rod is hinged to the first movable ring; a second movable ring is arranged at the outer peripheral side of the lower section of the sleeve in a penetrating manner, and a second connecting rod is hinged to the second movable ring; the end, far away from the first movable ring, of the first connecting rod is hinged with the end, far away from the second movable ring, of the second connecting rod; a diffusion penetration station for penetrating and connecting the steel strand is arranged at the joint of the first connecting rod and the second connecting rod; the distance between the first movable ring and the second movable ring can be adjusted; by the arrangement of the steel stranded wire diffusion device and the anchor cable system applying the steel stranded wire diffusion device, the increase of the pulling resistance and the anchoring force of the anchor cable can be effectively realized; the accident that landslide slope stability became invalid is reduced.
Description
Technical Field
The invention relates to the technical field of side slope and deep foundation pit supporting construction, in particular to a steel stranded wire diffusion device and an anchor cable system applying the same.
Background
The prestressed anchor cable technology plays an important role in treating geological disaster problems such as slope anchoring and landslide treatment, and is widely applied to deep foundation pit support. Due to the influences of the types of rock and soil bodies, the shapes of fracture surfaces, the surrounding rock pressure and the like, the ultimate pullout resistance of the anchor cable possibly cannot meet the requirement of a pullout resistance design value. However, with the widespread use of anchor cable reaming technology, the pulling resistance and anchoring force of the anchor cable are improved, but the amount of cement slurry used is increased.
Disclosure of Invention
The invention aims to provide a steel strand diffusion device and an anchor cable system using the same to overcome the defects of the prior art.
The steel strand diffusion device comprises a hollow sleeve, wherein a first movable ring is arranged on the outer peripheral side of the upper section of the sleeve in a penetrating manner, and a first connecting rod is hinged to the first movable ring; a second movable ring is arranged at the outer peripheral side of the lower section of the sleeve in a penetrating manner, and a second connecting rod is hinged to the second movable ring; the end, far away from the first movable ring, of the first connecting rod is hinged with the end, far away from the second movable ring, of the second connecting rod; a diffusion penetration station for penetrating and connecting the steel strand is arranged at the joint of the first connecting rod and the second connecting rod; the distance between the first movable ring and the second movable ring can be adjusted.
Furthermore, a threaded section is arranged at the outer peripheral side of the upper section of the sleeve, and the first movable ring is a movable nut screwed on the threaded section; the second movable ring is a movable bearing which is positioned and connected at the position of the outer peripheral side of the lower section of the sleeve in a penetrating way, and the movable bearing can perform self-rotation motion around the sleeve; the distance between the first movable ring and the second movable ring is adjusted along with the rotation of the sleeve.
Furthermore, a first penetrating station for penetrating and connecting the steel strand is arranged on the first movable ring.
Furthermore, a second penetrating station for penetrating and connecting the steel strand is arranged on the second movable ring.
Furthermore, the number of the diffusion cross-connecting stations is at least three, and the diffusion cross-connecting stations are uniformly distributed around the central shaft of the sleeve in the circumferential direction.
Furthermore, the number of the first cross-connection stations, the number of the second cross-connection stations and the number of the diffusion cross-connection stations are at least three, the first cross-connection stations, the second cross-connection stations and the diffusion cross-connection stations are all arranged in the same direction along the axial direction of the sleeve, and the first cross-connection stations, the second cross-connection stations and the diffusion cross-connection stations are all arranged around the central shaft of the sleeve in a circumferential and uniform mode.
Furthermore, the adjusting range of the opening angle of the first connecting rod and the second connecting rod is more than or equal to 60 degrees and less than 180 degrees.
Furthermore, a stranded wire connecting groove for penetrating and connecting the steel stranded wire is formed in the hollow inner wall of the sleeve.
The anchor cable system comprises a steel strand group consisting of a plurality of steel strands side by side, wherein the steel strand group is provided with the steel strand diffusion device in a penetrating manner, and the steel strand group is connected with a rotation driving device.
Furthermore, the steel strand group is provided with at least two groups of steel strand diffusion devices in a sectional penetrating manner along the axial direction of the steel strand group.
The invention has the beneficial effects that:
through the application of the steel strand diffusion device, the steel strand in the anchor cable system can be effectively diffused in the hole expansion, so that the friction force between the steel strand and cement mortar in the hole after the cement mortar is poured can be effectively increased, the anti-pulling force and the anchoring force of the anchor cable are increased, the using amount of the construction cement mortar is reduced, and the accident of landslide slope stability failure is reduced.
By applying the anchor cable system, the technical effect of semi-automatic construction can be effectively realized, and the overall construction efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a steel strand diffusion device according to the present invention in a first state;
FIG. 2 is a schematic structural view of a steel strand diffusion device according to the present invention in a first state;
fig. 3 is a schematic view of an application of the anchor cable system of the present invention.
Description of reference numerals:
the steel strand diffusion device comprises a steel strand diffusion device 1, a sleeve 11, a thread section 12, a movable nut 13, a movable bearing 14, a diffusion penetration station 15, a first penetration station 16, a second penetration station 17, a strand connection groove 18, a steel strand group 2, a base part 21, a diffusion part 22, a first through hole section 31, a first expanded hole section 32, a second through hole section 33, a second expanded hole section 34, anchor sealing concrete 4 and an anchor cable head 5.
Detailed Description
In order to make the technical solution, the purpose and the advantages of the present invention more apparent, the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 3, the anchor cable system of the present invention includes a steel strand group 2 composed of a plurality of steel strands side by side, and a corresponding steel strand diffusion device 1 is installed in the steel strand group 2 in a penetrating manner for diffusion application of the steel strands.
The steel strand in the steel strand group 2 is divided into a base part 21 in the middle and a diffusion part 22 at the peripheral side; then, as a preferred embodiment, the steel strand diffusion device 1 of the present invention comprises a hollow sleeve 11, and a strand connecting groove 18 for the steel strand of the base part 21 to be connected is arranged at the position of the hollow inner wall of the sleeve 11; a first movable ring is arranged on the outer peripheral side of the upper section of the sleeve 11 in a penetrating manner, and a first connecting rod is hinged to the first movable ring; a second movable ring is arranged on the outer peripheral side of the lower section of the sleeve 11 in a penetrating manner, and a second connecting rod is hinged to the second movable ring; the end, far away from the first movable ring, of the first connecting rod is hinged with the end, far away from the second movable ring, of the second connecting rod; a diffusion penetration station 15 for penetrating and connecting the steel strands of the diffusion part 22 is arranged at the joint position of the first connecting rod and the second connecting rod; the distance between the first movable ring and the second movable ring can be adjusted.
The distance between the first movable ring and the second movable ring is correspondingly adjusted to enable the first connecting rod and the second connecting rod which are hinged to each other to change the position in the radial direction, so that the steel strand which is penetrated and connected to the diffusion penetrating and connecting station 15 is adjusted in the outward expansion position in the radial direction, and the application requirement of the steel strand for diffusion action is met.
In order to realize the corresponding adjustment and change of the distance between the movable rings, the scheme can be arranged between the first movable ring and the second movable ring through a distance adjusting structure in the prior art (such as an application mode of transmission connection of a screw nut), and the first movable ring and the second movable ring can slidably perform distance adjusting movement with the outer side of the sleeve 11 through corresponding limiting guide groove structures; and then remote control is carried out through a corresponding electric control numerical control communication transmission mode, and the requirement of the steel stranded wire expansion can be met.
On the other hand, the invention also provides another steel strand diffusion device 1 structure for application in consideration of application cost structure. In the steel stranded wire diffusion device 1, a threaded section 12 is arranged at the outer peripheral side of the upper section of the sleeve 11, and the first movable ring is a movable nut 13 screwed on the threaded section 12; the second movable ring is a movable bearing 14 which is positioned and penetrated at the position of the outer periphery of the lower section of the sleeve 11, and the movable bearing 14 can rotate around the sleeve 11. The steel strand of said base part 21 can be connected with a rotary drive which can be applied as a twisting machine of the prior art. The rotary drive drives the steel strand of the base part 21 in a rotary motion about its central axis. The steel strand of the base part 21 is linked with the sleeve 11 to rotate through the strand connecting groove 18, so that under the rotation of the sleeve 11, the movable bearing 14 is adjusted in a self-adapting mode without displacement change relative to the sleeve 11, under the action of the steel strand force of the diffusion part 22 penetrating the diffusion penetrating station 15, the movable nut 13 is limited to move, the sleeve 11 is enabled to move in a rotating mode relative to the movable nut 13, under the action of the thread section 12, the movable nut 13 moves along the axial direction of the sleeve 11, and therefore the distance between the movable nut 13 and the movable bearing 14 is adjusted.
As a preferred embodiment, the first movable ring is provided with a first threading station 16 for threading the steel strand, the second movable ring is provided with a second threading station 17 for threading the steel strand, the first threading station 16, the second threading station 17 and the diffusion threading station 15 are provided with at least three stations, each of the first threading station 16, the second threading station 17 and the diffusion threading station 15 is provided in a one-to-one correspondence manner, the first threading station 16, the second threading station 17 and the diffusion threading station 15 are all arranged in the same direction along the axial direction of the sleeve 11, and each of the first threading station 16, the second threading station 17 and the diffusion threading station 15 is uniformly arranged circumferentially around the central shaft position of the sleeve 11. In practical application, the opening angle adjustment range of the first connecting rod and the second connecting rod is preferably greater than or equal to 60 degrees and less than 180 degrees; the tail ends of the steel strand wire groups 2 are fixedly connected through anchor cable heads 5.
Accordingly, the steel strand diffusion device 1 of the present invention, or having a plurality of steel strand threading methods, is configured to meet different geographical settings and pre-stress conditions:
example 1:
the steel strand of the diffusion part 22 is only threaded to the diffusion threading station 15, and under the corresponding diffusion action, the steel strand of the diffusion part 22 makes a small degree of arc-shaped curved change corresponding to the position section of the steel strand diffusion device 1.
Example 2:
the steel strand of the diffusion part 22 is threaded to the first threading station 16 and the diffusion threading station 15, so that under corresponding diffusion actions, the steel strand of the diffusion part 22 is subjected to arc-shaped bending change to a certain extent corresponding to the position section of the steel strand diffusion device 1, and the arc-shaped bending section is positioned at an upper section; if the steel strand diffusion device 1 is located at the end of the steel strand group 2 and the end of the steel strand group 2 is not constrained by a component, the steel strand of the diffusion part 22 will change in a claw shape corresponding to the position of the steel strand diffusion device 1, and the end of the steel strand of the diffusion part 22 can be extended to the outside in the radial direction to the maximum extent.
Example 3:
the steel strand of the diffusion part 22 is threaded to the first threading station 16, the diffusion threading station 15 and the second threading station 17, so that under the corresponding diffusion action, the steel strand of the diffusion part 22 makes a great degree of arc-shaped bending change corresponding to the position section of the steel strand diffusion device 1, and the arc-shaped bending section is positioned at the middle section.
Example 4:
the steel strand of the diffusion part 22 is threaded to the diffusion threading station 15 and the second threading station 17, so that under the corresponding diffusion action, the steel strand of the diffusion part 22 makes arc-shaped bending change to a certain degree corresponding to the position section of the steel strand diffusion device 1, and the arc-shaped bending section is in a lower section position.
Correspondingly, as a preferred embodiment, in the anchor cable system of the present invention, the steel strand diffusion devices 1 are provided in at least two groups in a segmented manner along the axial direction of the steel strand group 2, and under the rotational linkage of the corresponding steel strands, the steel strand diffusion devices 1 drive the corresponding segmented steel strands to perform diffusion along the radial direction thereof, thereby implementing the application of the multi-segment diffusion steel strands.
In practical anchoring applications, the anchor cable system of the present invention has the following construction steps:
s1, carrying out hole digging construction on the anchoring section of the firm soil layer:
s1-1, aiming at a firm soil layer, determining the position of a drilled hole and adjusting the angle of a drill rod, carrying out first drilling construction, and drilling a first through hole section 31;
s1-2, pulling out the drill rod and replacing the drilling bit with a reaming bit; carrying out first hole-drawing construction and reaming operation of the enlarged head part so as to form a first reaming section 32;
s1-3, pulling out the reaming brick, readjusting the angle of the drill rod, performing second drilling construction, and drilling out a second through hole section 33;
s1-4, pulling out the drill rod again and replacing the drilling bit with a reaming bit; a second reaming operation is performed to enlarge the head to form a second reamed section 34.
The diameter of the drilling hole of the corresponding through hole section is 150mm-180 mm; the length of the whole drilled hole is 0.4-0.6 m longer than that of the steel strand, and the diameter of the corresponding reaming section is 220-250 mm.
S2, correspondingly installing the steel strand diffusion device 1 on the steel strand group 2 corresponding to the positions of the first hole expanding section 32 and the second hole expanding section 34; integrally placing the anchor cable system, wherein the length of the integral anchor cable is ensured to ensure that a steel strand group 2 is not less than 0.8m of a tensioning section outside the hole;
and S3, the steel strand of the base part 21 is twisted outside the hole by a twisting machine, the twisting machine clamps the steel strand to twist, the position of the steel strand of the diffusion part 22 is kept still, and the steel strand is diffused by the relative motion of the steel strand diffusion device 1.
S4, performing rotary jet grouting inside the excavated hole, and performing tensioning operation on the anchor cable system after the strength of a grouting anchoring body reaches over 75% so that the steel strand end outside the hole is tensioned to the pile foundation position and reaches a tensioning design value; and then the steel strand group 2 at the position of the pile foundation is locked by an anchorage device and is sealed by the sealing anchor concrete 4.
The above description is only a preferred embodiment of the present invention, and those skilled in the art may still modify the described embodiment without departing from the implementation principle of the present invention, and the corresponding modifications should also be regarded as the protection scope of the present invention.
Claims (9)
1. The steel stranded wire diffusion device is characterized by comprising a hollow sleeve, wherein a stranded wire connecting groove for penetrating and connecting the steel stranded wire of the base part is formed in the hollow inner wall of the sleeve; a first movable ring is arranged on the outer peripheral side of the upper section of the sleeve in a penetrating manner, and a first connecting rod is hinged to the first movable ring; a second movable ring is arranged at the outer peripheral side of the lower section of the sleeve in a penetrating manner, and a second connecting rod is hinged to the second movable ring; the end, far away from the first movable ring, of the first connecting rod is hinged with the end, far away from the second movable ring, of the second connecting rod; a diffusion penetration station for penetrating and connecting steel strands of a diffusion part is arranged at the joint position of the first connecting rod and the second connecting rod; the distance between the first movable ring and the second movable ring can be adjusted.
2. The steel strand diffusion device according to claim 1, wherein a threaded section is provided at a position on an outer circumferential side of the upper section of the sleeve, and the first movable ring is a movable nut screwed on the threaded section; the second movable ring is a movable bearing which is positioned and connected at the position of the outer peripheral side of the lower section of the sleeve in a penetrating way, and the movable bearing can perform self-rotation motion around the sleeve; the distance between the first movable ring and the second movable ring is adjusted along with the rotation of the sleeve.
3. The steel strand spreading device of claim 1, wherein the first movable ring is provided with a first threading station for threading the steel strand of the spreading section.
4. The steel strand spreading device according to claim 3, wherein a second threading station for threading the steel strand of the spreading section is provided on the second movable ring.
5. The steel strand diffusion device of claim 1, wherein there are at least three diffusion cross-over stations, each diffusion cross-over station being evenly circumferentially disposed about a central axis location of the sleeve.
6. The steel strand diffusion device according to claim 4, wherein the number of the first cross-connecting station, the second cross-connecting station and the diffusion cross-connecting station is at least three, the first cross-connecting station, the second cross-connecting station and the diffusion cross-connecting station are all arranged in the same direction along the axial direction of the sleeve, and the first cross-connecting station, the second cross-connecting station and the diffusion cross-connecting station are all arranged around the central axis of the sleeve in a circumferential direction.
7. The steel strand spreading device of claim 1, wherein the adjustment range of the opening angle of the first connecting rod and the second connecting rod is 60 degrees or more and less than 180 degrees.
8. The anchor cable system is characterized by comprising a steel strand group consisting of a plurality of steel strands side by side, wherein the steel strand group comprises a base part and a diffusion part, the steel strand group is provided with the steel strand diffusion device according to any one of claims 1 to 7 in a penetrating manner, and the steel strand group is connected with a rotation driving device.
9. The cable bolt system of claim 8, wherein said steel strand sets are provided with at least two sets of said steel strand spreading means extending through said steel strand sets in stages along the axial direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010825625.7A CN111851485B (en) | 2020-08-17 | 2020-08-17 | Steel strand diffusion device and anchor cable system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010825625.7A CN111851485B (en) | 2020-08-17 | 2020-08-17 | Steel strand diffusion device and anchor cable system using same |
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| Publication Number | Publication Date |
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| CN111851485A CN111851485A (en) | 2020-10-30 |
| CN111851485B true CN111851485B (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010825625.7A Active CN111851485B (en) | 2020-08-17 | 2020-08-17 | Steel strand diffusion device and anchor cable system using same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113417285A (en) * | 2021-08-05 | 2021-09-21 | 宝业湖北建工集团有限公司 | Local reaming is from anchor type soil nail for excavation supporting |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450308A1 (en) * | 1979-01-23 | 1980-09-26 | Freyssinet Int Stup | Mechanical anchor with umbrella feet for unstable ground - has solid pointed head with feed pivoted to crown and spread out by pulling cord |
| US4351136A (en) * | 1980-01-14 | 1982-09-28 | Raymond International Builders, Inc. | Ground anchor installation |
| CN102650132A (en) * | 2012-05-15 | 2012-08-29 | 中国京冶工程技术有限公司 | Embedded recoverable expansion anchor cable and construction method thereof |
| CN106638590A (en) * | 2016-12-09 | 2017-05-10 | 孙贵超 | Tile leaf type expansion anchor rope/rod |
| CN208455617U (en) * | 2018-06-27 | 2019-02-01 | 刘晓理 | The film pouch-type umbrella enlarged footing of follow-up synchronous with whirl spraying anchor cable |
| CN110552348A (en) * | 2019-09-04 | 2019-12-10 | 刘晓理 | Pre-retracting type full-working-condition umbrella-shaped body expanding device and using method thereof |
| CN210857238U (en) * | 2019-08-14 | 2020-06-26 | 中国二十冶集团有限公司 | Prestressed anchor cable structure |
| CN211256870U (en) * | 2019-11-11 | 2020-08-14 | 山东洪通集团有限公司 | Expanding anchoring steel strand |
-
2020
- 2020-08-17 CN CN202010825625.7A patent/CN111851485B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450308A1 (en) * | 1979-01-23 | 1980-09-26 | Freyssinet Int Stup | Mechanical anchor with umbrella feet for unstable ground - has solid pointed head with feed pivoted to crown and spread out by pulling cord |
| US4351136A (en) * | 1980-01-14 | 1982-09-28 | Raymond International Builders, Inc. | Ground anchor installation |
| CN102650132A (en) * | 2012-05-15 | 2012-08-29 | 中国京冶工程技术有限公司 | Embedded recoverable expansion anchor cable and construction method thereof |
| CN106638590A (en) * | 2016-12-09 | 2017-05-10 | 孙贵超 | Tile leaf type expansion anchor rope/rod |
| CN208455617U (en) * | 2018-06-27 | 2019-02-01 | 刘晓理 | The film pouch-type umbrella enlarged footing of follow-up synchronous with whirl spraying anchor cable |
| CN210857238U (en) * | 2019-08-14 | 2020-06-26 | 中国二十冶集团有限公司 | Prestressed anchor cable structure |
| CN110552348A (en) * | 2019-09-04 | 2019-12-10 | 刘晓理 | Pre-retracting type full-working-condition umbrella-shaped body expanding device and using method thereof |
| CN211256870U (en) * | 2019-11-11 | 2020-08-14 | 山东洪通集团有限公司 | Expanding anchoring steel strand |
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