CN111764384A - Adopt single-deck bellows and resin material to realize anticorrosive anchor rope structure of double-deck - Google Patents
Adopt single-deck bellows and resin material to realize anticorrosive anchor rope structure of double-deck Download PDFInfo
- Publication number
- CN111764384A CN111764384A CN201910950099.4A CN201910950099A CN111764384A CN 111764384 A CN111764384 A CN 111764384A CN 201910950099 A CN201910950099 A CN 201910950099A CN 111764384 A CN111764384 A CN 111764384A
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- section
- plastic sleeve
- anchoring section
- layer
- pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Abstract
The invention provides an anchor cable structure for realizing double-layer corrosion resistance by adopting a single-layer corrugated pipe and a resin material, wherein a corrugated plastic sleeve is arranged on the periphery of a steel strand of an anchoring section; the anchoring section is provided with an internal resin injection pipe and an internal resin backflow pipe of the anchoring section, an external grout inlet pipe and an external grout return pipe of the anchoring section, a grouting solidification body is filled between a corrugated plastic sleeve of the anchoring section and the wall of the anchor rope hole, and the interior of the corrugated plastic sleeve of the anchoring section is filled with the resin solidification body. The anchor cable structure adopts the single-layer plastic corrugated pipe and the resin solidified body to carry out double-layer corrosion prevention on the anchor section of the anchor cable, adopts the smooth plastic sleeve and the PE sleeve to carry out double-layer corrosion prevention on the free section, and provides an effective anchor cable structure with a simpler structure and stronger corrosion prevention capability for underground cavern support.
Description
Technical Field
The invention relates to an anchor cable structure for realizing double-layer corrosion prevention by adopting a single-layer corrugated pipe and a resin material, which is mainly suitable for engineering of reinforcing a stratum and allowing the stratum to deform in a proper amount.
Background
The anchor cable is a rod-shaped member mainly bearing tensile force, and is characterized by that it utilizes drilling to fix the steel strand or high-strength steel wire in the deep stable stratum, and makes the surface of the reinforced body produce prestress by means of tension so as to attain the goal of stabilizing reinforced body and limiting its deformation. The anchor cable consists of an anchorage device, a prestressed stranded wire or a high-strength steel wire and an accessory. The steel strand is classified into a bonded type and a non-bonded type according to the type of the steel strand. With the development of anchoring technology, the requirements on the reliability and durability of the anchor cable are higher and more precise, and especially, the permanent protection anchor cable is required to be adopted for permanent buildings; the external anchor head is required to have a reliable anchoring effect, and prestress loss caused by factors such as thread slipping is avoided; the anchor cable body is required to have high strength, low looseness and high protection performance. The prestressed anchor cable is buried in the deep part of the stratum, the working condition is very bad, the steel strand consisting of steel wires with small diameter is easy to generate stress corrosion under the condition of high tensile stress, and the corrosion of the anchor cable body is the largest threat factor influencing the service life of the anchor cable. The accident that the anchor cable is damaged because the anchor cable anticorrosion protection structure is improperly designed and constructed in China and sometimes happens due to corrosion.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, the anchor cable structure which adopts the single-layer corrugated pipe and the resin material to realize double-layer corrosion prevention is provided. The technical scheme adopted by the invention is as follows:
an anchor cable structure for realizing double-layer corrosion resistance by adopting a single-layer corrugated pipe and a resin material comprises an anchoring section, a free section and an anchor head, and is characterized in that a corrugated plastic sleeve is arranged on the periphery of a steel strand of the anchoring section, and a smooth plastic sleeve is arranged on the periphery of the steel strand of the free section; grouting solidified bodies are filled between the smooth plastic sleeve of the free section and the wall of the anchor cable hole and inside the smooth plastic sleeve of the free section; the anchoring section is provided with an internal resin injection pipe and an internal resin backflow pipe of the anchoring section, an external grout inlet pipe and an external grout return pipe of the anchoring section, a grouting solidification body is filled between a corrugated plastic sleeve of the anchoring section and the wall of the anchor rope hole, and the interior of the corrugated plastic sleeve of the anchoring section is filled with the resin solidification body.
On the basis of the technical scheme, the invention can also adopt the following further technical schemes or combine the further technical schemes for use:
the smooth plastic sleeve of the free section extends to the anchoring section and is connected with the corrugated sleeve of the anchoring section in a sealing way; the smooth plastic sleeve at the free section extends into the guide steel pipe and is sealed with the guide steel pipe; the guide steel pipe extends from the end part of the free section to the top of the hole of the bearing backing plate of the anchor head, the anchor head is provided with a steel protective cap for sealing the anchor head, and the steel protective cap and the bearing backing plate are sealed.
Sealing and isolating the anchoring section and the free section, wherein the steel strand of the anchoring section does not contain a PE sleeve, a corrugated plastic sleeve is used as a layer for corrosion prevention, and a resin solidified body in the plastic corrugated pipe is used as a second layer for corrosion prevention; the free section adopts a layer of smooth plastic sleeve and forms a double-layer anti-corrosion structure with the PE sleeve outside the steel strand.
The plastic sleeves of the free section and the anchoring section are sleeved with centering brackets, and the inner sides of the plastic sleeves of the free section and the anchoring section are provided with isolating frames.
The corrugated plastic sleeve of the anchoring section and the smooth plastic sleeve of the free section are overlapped at the junction and are connected through an adhesive.
The free section also comprises a centering free section bracket, an isolation frame, an internal slurry inlet pipe, an internal slurry return pipe, an external slurry inlet pipe, a smooth plastic sleeve and a steel strand with a PE sleeve.
The anchoring section further comprises a guide cap, an anchoring section external slurry inlet pipe, an anchoring section external slurry return pipe, an anchoring section corrugated plastic sleeve and a steel strand stripped of a PE sleeve.
The end of the corrugated pipe of the anchoring section is connected and sealed with the guide cap through an adhesive; the corrugated plastic sleeve of the anchoring section and the smooth plastic sleeve of the free section are overlapped at the junction, and the corrugated plastic sleeve and the smooth plastic sleeve are connected and sealed through an adhesive; the smooth plastic sleeve of the free section extends into the guide steel pipe and is connected and sealed with the guide steel pipe.
And filling anticorrosive grease or mortar after tensioning the free section near the anchor head end and the anchor head steel protective cap.
The anchor cable structure adopts the single-layer plastic corrugated pipe and the resin solidified body to carry out double-layer corrosion prevention on the anchor section of the anchor cable, adopts the smooth plastic sleeve and the PE sleeve to carry out double-layer corrosion prevention on the free section, and is beneficial to reducing the span of underground engineering due to the design of the anchor head.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a cross-sectional a-a structure of a free segment according to an embodiment of the present invention.
Fig. 3 is a schematic view of a cross-sectional B-B structure of an anchor segment according to an embodiment of the present invention.
Detailed Description
The patent is further described below with reference to the accompanying drawings.
As shown in fig. 1, an anchor cable structure using a single-layer corrugated pipe and a resin material to achieve double-layer corrosion prevention includes an anchoring section 100, a free section 200, and an anchor head 300.
The anchoring section 100 comprises a guide cap 101, an anchoring section external slurry inlet pipe 102 (the end of which does not exceed the guide cap 101), an isolation frame 103, an anchoring section centering support 104, a steel strand 105 for stripping a PE sleeve and removing grease, a corrugated plastic sleeve 107 with an anti-corrosion function, an anchoring section external slurry return pipe 108, an anchoring section internal resin injection pipe 109 and an anchoring section internal resin return pipe 110, wherein the end of the anchoring section corrugated pipe and the guide cap 101 are effectively sealed 106 through an adhesive; the arrangement of the slurry inlet pipe of the anchoring section can fill the gap between the plastic pipe and the rock wall side at one time, so that the operation is convenient; the centering bracket 104 is sleeved outside the corrugated plastic sleeve 107 and is matched with the hole wall of the anchor cable hole to play a supporting and centering function, so that the unevenness of an anticorrosion protection structure caused by the displacement of the corrugated plastic sleeve 107 in the grouting process is avoided, and the anticorrosion protection effect and the integral mechanical property are improved. Compared with cement paste, the anchoring section is made of resin, so that better bonding force can be provided, the anchoring section can be shorter, the resin material can be used as a layer of anticorrosion protection, and the anticorrosion performance of the anchor cable structure is effectively improved.
The free section 200 comprises a free section internal slurry inlet pipe 201, a centering support 202, an isolation frame 203, a smooth plastic sleeve pipe 204 with an anticorrosion function, a free section internal slurry return pipe 205, a free section external slurry return pipe 206, a guide steel pipe 207, a steel strand 208 with a PE sleeve and a free section external slurry inlet pipe 209. The anchor section external slurry inlet pipe 102 passes through the free section 200. The centering bracket 202 is sleeved outside the smooth plastic sleeve 204 and is matched with the hole wall of the anchor cable hole to play a supporting and centering function, so that the nonuniformity of an anticorrosion protection structure caused by the displacement of the smooth plastic sleeve 204 in the grouting process is avoided, and the anticorrosion protection effect and the integral mechanical property are improved.
The corrugated plastic sleeve not only has the function of corrosion prevention, but also can provide enough anchoring friction force. Grouting solidification bodies 500 are filled between the smooth plastic sleeve 204 of the free section and the anchor cable hole wall 600 and inside the smooth plastic sleeve 204 of the free section; the inside of the anchor corrugated plastic sleeve 107 is filled with the resin cured body 400, and the space between the anchor corrugated plastic sleeve 107 and the hole wall 600 is filled with the grouting solidified body 500.
The anchor head 300 comprises leveling foundation concrete 301 (the pipes 102, 108, 201, 209, 205 and 206 are buried therein), an anchor 302, a steel protective cap 303 (sealed with a pressure bearing backing plate) for sealing the anchor head, a pressure bearing backing plate (composed of three steel backing plates 304, the number of blocks can be increased or reduced), four bolt anchor rods 305 for fixing the lower backing plate and anti-corrosion grease or mortar 306 filled in the anchor head, and the design of the steel protective cap 303 can reduce the occupied space of the anchor head to the maximum extent and is beneficial to reducing the span of an underground cavern.
The smooth plastic sleeve 204 and the guide steel pipe 207 of the free section are overlapped for a certain length, the rubber sealing ring 702 is adopted to seal the port of the guide steel pipe 207, which is inserted by the smooth plastic sleeve 204, the guide steel pipe 207 extends from the end part of the free section into the hole of the bearing cushion plate and can extend into the top of the hole of the bearing cushion plate, namely the hole of the upper steel cushion plate 304 and is connected with the hole in a full welding mode, and the steel protective cap 303 and the upper steel cushion plate 304 in the bearing cushion plate are sealed. In this way, the guide steel pipe 207 can play a role in protecting against corrosion comprehensively, and not only can be used for guiding the orifice, but also can play a role in completely sealing the anti-corrosion grease (mortar) 306 and the steel strand inside the anchor head.
The smooth plastic sleeve 204 and the corrugated plastic sleeve 107 between the anchoring section 100 and the free section 200 have certain overlapping length, the rubber sealing ring 701 is adopted to effectively seal and isolate the concrete between the anchoring section and the free section outside the smooth plastic sleeve 204 and the corrugated plastic sleeve 107, the inside of the anchoring section plastic corrugated sleeve 107 at the same position is blocked by asphalt 703, the concrete between the anchoring section and the free section inside the smooth plastic sleeve 204 and the corrugated plastic sleeve 107 is effectively sealed and isolated, which is equivalent to a buffer section, the separation of the anchoring section and the free section is realized, the transmission of prestress into the free section is avoided, and the function exertion of each part is ensured.
Preferably, the plastic sleeves of the anchoring section and the free section are not whole but broken, the corrugated sleeve adopted by the anchoring section can ensure that enough anchoring force exists between the corrugated sleeve and cement paste/resin, and the smooth sleeve adopted by the free section can ensure that the anchoring force is not transmitted to the free section.
The implementation steps are as follows: after drilling and hole cleaning are completed on site, an anchor cable is inserted into the hole 600, wherein the anchor cable comprises a steel strand, a plastic sleeve, a centering bracket, an isolation frame and the like, the steel strand comprises an anchoring section and a free section, a rubber sealing ring 701 is bonded at a corresponding position, and the asphalt 703 blocks the end of the anchoring section. The steel strands of the anchor section may be tied in place with zinc-free lead wires 111.
Utilize outside grout inlet pipe 102 of anchor section to carry out the slip casting to the anchor section outside, the inside resin injection pipe of anchor section is to the inside resin material that injects of anchor section ripple plastic casing, utilize inside grout inlet pipe 201 of free section to carry out the grout to the smooth intraductal side of free section 200 plastics, utilize outside grout inlet pipe of free section to carry out the grout to the smooth intraductal side of free section 200 plastics, treat outside grout return pipe 108 of anchor section, the outside grout return pipe 206 of free section and the stable back grouting in upper end drill way of the inside grout return pipe 205 of free section, stop the slip casting, when the inside resin return pipe 110 of anchor section has the resin of backflowing, also stop injecting resin. And when the grouting slurry reaches the specified strength and the resin is cured, tensioning the anchor cable, pre-tightening and locking. And finally, sealing holes, backfilling and filling anticorrosive grease (mortar) 306, and sealing the steel protective cap 303 with the pressure bearing plate.
In this embodiment, the grout inlet and outlet pipes in the drawings correspond to the case when the anchor cable hole is a pitching hole, that is, the grout inlet pipe in the pitching hole is used as the grout inlet pipe in the pitching hole, the grout outlet pipe in the pitching hole is used as the grout inlet pipe in the pitching hole, and the functions of the grout inlet and outlet pipes in the pitching hole are correspondingly exchanged.
The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the relevant art are covered by the protection scope of the present invention.
Claims (8)
1. An anchor cable structure for realizing double-layer corrosion resistance by adopting a single-layer corrugated pipe and a resin material comprises an anchoring section, a free section and an anchor head, and is characterized in that a corrugated plastic sleeve is arranged on the periphery of a steel strand of the anchoring section, and a smooth plastic sleeve is arranged on the periphery of the steel strand of the free section; grouting solidified bodies are filled between the smooth plastic sleeve of the free section and the wall of the anchor cable hole and inside the smooth plastic sleeve of the free section; the anchoring section is provided with an internal resin injection pipe and an internal resin backflow pipe of the anchoring section, an external grout inlet pipe and an external grout return pipe of the anchoring section, a grouting solidification body is filled between a corrugated plastic sleeve of the anchoring section and the wall of the anchor rope hole, and the interior of the corrugated plastic sleeve of the anchoring section is filled with the resin solidification body.
2. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: the smooth plastic sleeve of the free section extends to the anchoring section and is connected with the corrugated sleeve of the anchoring section in a sealing way; the smooth plastic sleeve at the free section extends into the guide steel pipe and is sealed with the guide steel pipe; the guide steel pipe extends from the end part of the free section to the top of the hole of the bearing backing plate of the anchor head, the anchor head is provided with a steel protective cap for sealing the anchor head, and the steel protective cap and the bearing backing plate are sealed.
3. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: sealing and isolating the anchoring section and the free section, wherein the steel strand of the anchoring section does not contain a PE sleeve, a corrugated plastic sleeve is used as a layer for corrosion prevention, and a resin solidified body in the plastic corrugated pipe is used as a second layer for corrosion prevention; the free section adopts a layer of smooth plastic sleeve and forms a double-layer anti-corrosion structure with the PE sleeve outside the steel strand.
4. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: the plastic sleeves of the free section and the anchoring section are sleeved with centering brackets, and the inner sides of the plastic sleeves of the free section and the anchoring section are provided with isolating frames.
5. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: the corrugated plastic sleeve of the anchoring section and the smooth plastic sleeve of the free section are overlapped at the junction and are connected through an adhesive.
6. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: the anchoring section further comprises a guide cap, an anchoring section external slurry inlet pipe, an anchoring section external slurry return pipe, an anchoring section corrugated plastic sleeve and a steel strand stripped of a PE sleeve.
7. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: the end of the corrugated pipe of the anchoring section is connected and sealed with the guide cap through an adhesive; the corrugated plastic sleeve of the anchoring section and the smooth plastic sleeve of the free section are overlapped at the junction, and the corrugated plastic sleeve and the smooth plastic sleeve are connected and sealed through an adhesive; the smooth plastic sleeve of the free section extends into the guide steel pipe and is connected and sealed with the guide steel pipe.
8. The anchor cable structure for realizing double-layer corrosion prevention by adopting the single-layer corrugated pipe and the resin material as claimed in claim 1, wherein: and filling anticorrosive grease or mortar after tensioning the free section near the anchor head end and the anchor head steel protective cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950099.4A CN111764384B (en) | 2019-10-08 | 2019-10-08 | Adopt single-deck bellows and resin material to realize anticorrosive anchor rope structure of double-deck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950099.4A CN111764384B (en) | 2019-10-08 | 2019-10-08 | Adopt single-deck bellows and resin material to realize anticorrosive anchor rope structure of double-deck |
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| Publication Number | Publication Date |
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| CN111764384A true CN111764384A (en) | 2020-10-13 |
| CN111764384B CN111764384B (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910950099.4A Active CN111764384B (en) | 2019-10-08 | 2019-10-08 | Adopt single-deck bellows and resin material to realize anticorrosive anchor rope structure of double-deck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324109A (en) * | 2022-07-18 | 2022-11-11 | 浙江大学 | Earth surface anchorage type reverse tensioning anchor cable system supporting suspension tunnel structure and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233687A (en) * | 1998-04-27 | 1999-11-03 | 中外合资柳州欧维姆建筑机械有限公司 | Whole coating steel twisted wire |
| CN202298615U (en) * | 2011-08-24 | 2012-07-04 | 柳州欧维姆机械股份有限公司 | Electrical isolation protective anchor cable |
| CN205894070U (en) * | 2016-07-28 | 2017-01-18 | 广东省建科建筑设计院有限公司 | A corrosion -resistant prefabricated grouted rock bolt for strongly -corrosive environment |
| WO2017144941A1 (en) * | 2016-02-22 | 2017-08-31 | Ecole Polytechnique Federale De Lausanne (Epfl) | Electrically isolated and corrosion-resistant micropile or tie |
| CN109056722A (en) * | 2018-08-22 | 2018-12-21 | 中国电建集团华东勘测设计研究院有限公司 | A kind of overall length anti-corrosion has binding type prestress anchorage cable |
-
2019
- 2019-10-08 CN CN201910950099.4A patent/CN111764384B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233687A (en) * | 1998-04-27 | 1999-11-03 | 中外合资柳州欧维姆建筑机械有限公司 | Whole coating steel twisted wire |
| CN202298615U (en) * | 2011-08-24 | 2012-07-04 | 柳州欧维姆机械股份有限公司 | Electrical isolation protective anchor cable |
| WO2017144941A1 (en) * | 2016-02-22 | 2017-08-31 | Ecole Polytechnique Federale De Lausanne (Epfl) | Electrically isolated and corrosion-resistant micropile or tie |
| CN205894070U (en) * | 2016-07-28 | 2017-01-18 | 广东省建科建筑设计院有限公司 | A corrosion -resistant prefabricated grouted rock bolt for strongly -corrosive environment |
| CN109056722A (en) * | 2018-08-22 | 2018-12-21 | 中国电建集团华东勘测设计研究院有限公司 | A kind of overall length anti-corrosion has binding type prestress anchorage cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324109A (en) * | 2022-07-18 | 2022-11-11 | 浙江大学 | Earth surface anchorage type reverse tensioning anchor cable system supporting suspension tunnel structure and construction method |
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| CN111764384B (en) | 2022-08-05 |
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