CN109252881B - Steel pipe cement mortar prestressed anchor cable and supporting method thereof - Google Patents
Steel pipe cement mortar prestressed anchor cable and supporting method thereof Download PDFInfo
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- CN109252881B CN109252881B CN201811306148.2A CN201811306148A CN109252881B CN 109252881 B CN109252881 B CN 109252881B CN 201811306148 A CN201811306148 A CN 201811306148A CN 109252881 B CN109252881 B CN 109252881B
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- steel pipe
- cement mortar
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- cable
- grouting
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 103
- 239000010959 steel Substances 0.000 title claims abstract description 103
- 239000011083 cement mortar Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims description 11
- 238000010276 construction Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims description 32
- 239000011435 rock Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a steel pipe cement mortar prestressed anchor cable, which comprises an anchor section, a first free section, a steel pipe cement mortar section, a second free section, an anchor cable accessory and a grouting connecting head. The steel pipe cement mortar section consists of a hollow steel pipe, a rope body penetrating through the hollow steel pipe and consolidated cement mortar filled in the steel pipe; the tile locks arranged at the two ends of the hollow steel pipe can lock the rope bodies at the two ends of the hollow steel pipe to form a closed cement mortar grouting space; the rear end of the hollow steel pipe is provided with an exhaust hole; a grouting pipe is arranged at the center of the cable body of the anchor cable, and extends into the cement mortar grouting space; the construction steps of the anchor cable are that the anchor cable is pre-tightened and then injected with cement mortar slurry to form a steel pipe cement mortar section. The tensile strength and the shear strength of the stress concentration section of the cable body can be improved by adding the steel pipe cement mortar structure in the middle of the cable body of the anchor cable, and the technical problem that the cable body is locally concentrated in stress and the steel stranded wires are broken by being broken in each mode in the anchor cable support is effectively solved.
Description
Technical Field
The invention belongs to the technical field of mine support engineering anchor cable support, and particularly relates to a steel pipe cement mortar prestressed anchor cable and a support method thereof.
Background
In coal mine roadway support engineering, anchor cable support is a common form of roof support. The anchor cable commonly used in coal mines is of a 7-strand or 19-strand steel strand structure, and the diameters of the commonly used anchor cables are 15.2mm, 17.8mm, 20mm and 22mm. Compared with the anchor bolt support, the anchor cable has the advantages of high strength and large length, and the anchor cable can be anchored into a stable rock stratum at the deep part of the top plate, so that the anchor cable support has remarkable effect on controlling the stability of the top plate. However, with gradual exploitation of coal resources, the stress environment of surrounding rock of a roadway is gradually deteriorated, and in a large-deformation roadway, a weak surrounding rock roadway and a high-stress dynamic pressure roadway, the problem of anchor cable breakage is increasingly remarkable. Under complex and difficult conditions, high-strength anchor cables with the diameter of 22mm are broken. Site observation shows that the broken positions of the anchor cables are all near the first 1/3 section of the orifice or the layer surface of the rock stratum with shearing dislocation; from the aspect of fracture morphology, the anchor cable is broken under the combined action of shearing damage and pulling damage. For the reason, the current anchor cable support mainly has the technical problems of local stress concentration and breaking of the steel strands one by one (strand) by being broken by each breaking under the action of pulling and shearing, and how to improve the tensile strength, the shear strength and the integrity of the stress concentration section of the anchor cable becomes a key problem for solving the breaking of the anchor cable.
Disclosure of Invention
The invention provides a steel pipe cement mortar prestressed anchor cable and a supporting method thereof, which aim to improve the tensile strength and the shear strength of a cable body of the section by adding a steel pipe cement mortar structure in the middle of the cable body of the anchor cable, thereby effectively solving the technical problems of 'local stress concentration of the cable body and breaking of steel strands one by one (strand) by each break' in the anchor cable support. Meanwhile, the anchor cable can apply larger prestress to realize active support of the rock stratum, and can prevent corrosion and breakage of the high-stress cable body through cement mortar wrapping.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the steel pipe cement mortar prestressed anchor cable comprises an anchoring section, a steel pipe cement mortar section and an anchor cable accessory which are connected in series through a cable body from back to front; the cable body part between the anchoring section and the steel pipe cement mortar section is a first free section, the cable body part between the steel pipe cement mortar section and the anchor cable accessory is a second free section, and the front end of the cable body is provided with a grouting connecting head; the anchor cable accessory comprises a tray and an anchor tail lockset;
the steel pipe cement mortar section comprises a hollow steel pipe, a cable body penetrates through the hollow steel pipe and is coaxially arranged with the hollow steel pipe, tile-type locks for locking the hollow steel pipe and the cable body into a whole are arranged at the front end and the rear end of the hollow steel pipe, exhaust holes are formed in the rear side part of the hollow steel pipe, a closed cement mortar grouting space is formed among the hollow steel pipe, the tile-type locks and the cable body, a grouting pipe is arranged at the central part of the cable body, the rear end of the grouting pipe extends into the cement mortar grouting space, and the front end of the grouting pipe is connected with a grouting connecting head; the cement mortar grouting space is filled with cement mortar.
The steel pipe cement mortar section is positioned at the front 1/3 section of the anchor cable or the cable body section which is easy to shear and break; the anchoring section is anchored by a resin anchoring agent.
The number and the positions of the steel pipe cement mortar sections are determined by the number and the positions of the cable bodies which are easy to be pulled and sheared.
The method for supporting the steel pipe cement mortar prestressed anchor cable comprises the following construction steps:
(1) Determining the strength and the size of the steel pipe cement mortar prestressed anchor cable, the position of the steel pipe cement mortar section, the pretightening force, the anchoring length and the interval row support parameters according to the geomechanical conditions of the required reinforced rock stratum;
(2) According to the determined support parameters, anchor rope holes are drilled in the required reinforced rock layer, wherein the diameters of the anchor rope holes are 10-16 mm larger than the diameters of the cable bodies, and the diameters of the anchor rope holes are 4-8 mm larger than the outer diameters of the hollow steel pipes; the diameter of the anchor cable hole and the outer diameter of the hollow steel pipe are properly adjusted according to actual production conditions;
(3) The cable body passes through the hollow steel pipe and the tile-type lockset and is assembled at the designed position to form a closed cement mortar grouting space, the front end of the cable body is used for conveying the resin anchoring agent to the bottom of the anchor cable hole, the drilling machine is used for driving the cable body to rotate so as to fully stir the resin anchoring agent, and an anchoring section is formed after the anchoring agent is solidified;
(4) After the resin anchoring agent is solidified, a tray and an anchor tail lockset are installed, an anchor rope is tensioned and pre-tensioned by a tensioning machine, and prestress is formed on the rope body of the first free section, the second free section and the steel pipe cement mortar section after the anchor tail lockset is locked, so that the reinforced rock stratum is actively supported;
(5) Grouting the grouting pipe at the central part of the cable body by adopting a grouting machine and a pipeline through a grouting connector after applying pretightening force to the anchor cable, wherein grouting materials are high-strength cement mortar, a cement mortar grouting space in the hollow steel pipe is filled with high-strength cement mortar slurry, and in the grouting process, gas in the cement mortar grouting space is discharged through an exhaust hole until the cement mortar is fully filled with the cement mortar grouting space, and the cement mortar is solidified in the hollow steel pipe to form a steel pipe cement mortar section;
(6) After the steel pipe cement mortar prestressed anchor cable is installed, the surface displacement, the internal deformation, the separation layer and the stress state of the anchor cable of the reinforced rock stratum are dynamically monitored in real time, the stability of the reinforced rock stratum and the reliability of the anchor cable are evaluated, and the supporting parameters of the anchor cable are dynamically adjusted according to the evaluation result.
By adopting the technical scheme, the invention has the following beneficial effects:
firstly, the steel pipe cement mortar section (structure) is added in the middle of the cable body of the anchor cable, so that the tensile strength and the shear strength of the cable body of the section can be improved, and the technical problems of local stress concentration of the cable body and breaking of steel strands one by one (strand) by each broken cable body in the anchor cable support are effectively solved;
secondly, the anchor cable can apply larger prestress, so that active support of the rock stratum is realized, and early deformation and damage of the rock stratum can be timely controlled;
thirdly, in the steel pipe cement mortar section of the cable body, the corrosion and breakage of the high-stress cable body can be prevented through cement mortar wrapping;
fourth, be provided with a plurality of free sections in the cable body, make full use of the elongation of free section, can adapt to the large deformation of country rock, improve anchor rope support's reliability.
Drawings
FIG. 1 is a block diagram of a steel tube cement mortar pre-stressed anchor cable of the present invention;
FIG. 2 is a block diagram of a steel pipe cement mortar section of the invention;
FIG. 3 is a steel tube cement mortar pre-stressed anchor cable support layout of the present invention;
in fig. 1-3: 1 is an anchoring section, 2 is a first free section, 3 is a steel pipe cement mortar section, 4 is a second free section, 5 is a tray, 6 is an anchor tail lock, 7 is a grouting coupling head, 8 is a hollow steel pipe, 9 is a rope body, 10 is high-strength cement mortar, 11 is a tile lock, 12 is an exhaust hole, 13 is a grouting pipe, 14 is a resin anchoring agent, 15 is a reinforced rock stratum, and 16 is an anchor rope hole.
Detailed Description
As shown in fig. 1 to 3, the embodiment of the present invention is as follows:
the steel pipe cement mortar prestressed anchor cable comprises an anchoring section 1, a steel pipe cement mortar section 3 and an anchor cable accessory which are connected in series through a cable body 9 from back to front; the part of the cable body 9 between the anchoring section 1 and the steel pipe cement mortar section 3 is a first free section 2, the part of the cable body 9 between the steel pipe cement mortar section 3 and the anchor cable accessory is a second free section 4, and the front end of the cable body 9 is provided with a grouting coupling head 7; the anchor cable attachment comprises a tray 5 and an anchor tail lock 6.
The steel pipe cement mortar section 3 comprises a hollow steel pipe 8, a rope body 9 penetrates through the hollow steel pipe 8 and is coaxially arranged with the hollow steel pipe 8, tile-type locks 11 for locking the hollow steel pipe 8 and the rope body 9 into a whole are arranged at the front end and the rear end of the hollow steel pipe 8, an exhaust hole 2 is formed at the rear side part of the hollow steel pipe 8, a closed cement mortar grouting space is formed among the hollow steel pipe 8, the tile-type locks 11 and the rope body 9, a grouting pipe 13 is arranged at the central part of the rope body 9, the rear end of the grouting pipe 13 extends into the cement mortar grouting space, and the front end of the grouting pipe 13 is connected with a grouting coupling head 7; the cement mortar 10 is filled in the cement mortar grouting space.
The steel pipe cement mortar section 3 is positioned at the front 1/3 section of the anchor cable or the 9 section of the cable body which is easy to shear and break; the anchoring section 1 is anchored by a resin anchoring agent.
The number and positions of the steel pipe cement mortar segments 3 are determined by the number and positions of the cable 9 which is easy to be pulled and sheared.
The method for supporting the steel pipe cement mortar prestressed anchor cable comprises the following construction steps:
(1) Determining the strength and the size of the steel pipe cement mortar prestressed anchor cable, the position, the pretightening force, the anchoring length and the interval row support parameters of the steel pipe cement mortar section 3 according to the geomechanical conditions of the reinforced rock stratum 15;
(2) According to the determined support parameters, anchor cable holes 16 are drilled in the required reinforced rock stratum 15, wherein the diameter of each anchor cable hole 16 is 10-16 mm larger than that of the cable body 9, and the diameter of each anchor cable hole 16 is 4-8 mm larger than the outer diameter of the hollow steel pipe 8; the diameter of the anchor cable hole and the outer diameter of the hollow steel pipe can be properly adjusted according to actual production conditions;
(3) The cable body 9 passes through the hollow steel pipe 8 and the tile-type lockset 11 and is assembled at a designed position to form a closed cement mortar grouting space, the front end of the cable body 9 is used for conveying the resin anchoring agent 14 into the bottom of the anchor cable hole 16, the drilling machine is adopted to drive the cable body 9 to rotate so as to fully stir the resin anchoring agent 14, and the anchoring section 1 is formed after the anchoring agent is solidified;
(4) After the resin anchoring agent 14 is solidified, the tray 5 and the anchor tail lock 6 are installed, the anchor cable is tensioned and pre-tightened by adopting a tensioning machine, prestress is formed on the first free section 2, the second free section 4 and the cable body 9 of the steel pipe cement mortar section 3 after the anchor tail lock 6 is locked, and the reinforced rock stratum 15 is actively supported;
(5) Grouting a grouting pipe 13 at the central part of the cable body 9 through a grouting connector 7 by adopting a grouting machine and a pipeline after pre-tightening force is applied to the anchor cable, wherein grouting materials are high-strength cement mortar 10, a cement mortar grouting space in the hollow steel pipe 8 is filled with high-strength cement mortar 10 slurry, in the grouting process, gas in the cement mortar grouting space is discharged through an exhaust hole 2 until the cement mortar 10 is fully filled with the cement mortar grouting space, and the cement mortar 10 is solidified in the hollow steel pipe 8 to form a steel pipe cement mortar section 3;
(6) After the steel pipe cement mortar prestressed anchor cable is installed, the surface displacement, the internal deformation, the separation layer and the stress state of the anchor cable of the reinforced rock stratum 15 are dynamically monitored in real time, the stability of the reinforced rock stratum 15 and the reliability of the anchor cable are evaluated, and the supporting parameters of the anchor cable are dynamically adjusted according to the evaluation result.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (1)
1. The method for supporting the steel pipe cement mortar prestressed anchor cable is characterized by comprising the following steps of: the steel pipe cement mortar prestressed anchor cable comprises an anchoring section, a steel pipe cement mortar section and an anchor cable accessory which are connected in series through a cable body from back to front; the cable body part between the anchoring section and the steel pipe cement mortar section is a first free section, the cable body part between the steel pipe cement mortar section and the anchor cable accessory is a second free section, and the front end of the cable body is provided with a grouting connecting head; the anchor cable accessory comprises a tray and an anchor tail lockset;
the steel pipe cement mortar section comprises a hollow steel pipe, a cable body penetrates through the hollow steel pipe and is coaxially arranged with the hollow steel pipe, tile-type locks for locking the hollow steel pipe and the cable body into a whole are arranged at the front end and the rear end of the hollow steel pipe, exhaust holes are formed in the rear side part of the hollow steel pipe, a closed cement mortar grouting space is formed among the hollow steel pipe, the tile-type locks and the cable body, a grouting pipe is arranged at the central part of the cable body, the rear end of the grouting pipe extends into the cement mortar grouting space, and the front end of the grouting pipe is connected with a grouting connecting head; cement mortar is filled in the cement mortar grouting space;
the steel pipe cement mortar section is positioned at the front 1/3 section of the anchor cable; the anchoring section is anchored by adopting a resin anchoring agent;
the number and the positions of the steel pipe cement mortar sections are determined by the number and the positions of the cable bodies which are easy to be pulled and sheared;
the supporting method comprises the following construction steps:
(1) Determining the strength and the size of the steel pipe cement mortar prestressed anchor cable, the position of the steel pipe cement mortar section, the pretightening force, the anchoring length and the interval row support parameters according to the geomechanical conditions of the required reinforced rock stratum;
(2) According to the determined support parameters, anchor rope holes are drilled in the required reinforced rock layer, wherein the diameters of the anchor rope holes are 10-16 mm larger than the diameters of the cable bodies, and the diameters of the anchor rope holes are 4-8 mm larger than the outer diameters of the hollow steel pipes; the diameter of the anchor cable hole and the outer diameter of the hollow steel pipe are properly adjusted according to actual production conditions;
(3) The cable body passes through the hollow steel pipe and the tile-type lockset and is assembled at the designed position to form a closed cement mortar grouting space, the front end of the cable body is used for conveying the resin anchoring agent to the bottom of the anchor cable hole, the drilling machine is used for driving the cable body to rotate so as to fully stir the resin anchoring agent, and an anchoring section is formed after the anchoring agent is solidified;
(4) After the resin anchoring agent is solidified, a tray and an anchor tail lockset are installed, an anchor rope is tensioned and pre-tensioned by a tensioning machine, and prestress is formed on the rope body of the first free section, the second free section and the steel pipe cement mortar section after the anchor tail lockset is locked, so that the reinforced rock stratum is actively supported;
(5) Grouting the grouting pipe at the central part of the cable body by adopting a grouting machine and a pipeline through a grouting connector after applying pretightening force to the anchor cable, wherein grouting materials are high-strength cement mortar, a cement mortar grouting space in the hollow steel pipe is filled with high-strength cement mortar slurry, and in the grouting process, gas in the cement mortar grouting space is discharged through an exhaust hole until the cement mortar is fully filled with the cement mortar grouting space, and the cement mortar is solidified in the hollow steel pipe to form a steel pipe cement mortar section;
(6) After the steel pipe cement mortar prestressed anchor cable is installed, the surface displacement, the internal deformation, the separation layer and the stress state of the anchor cable of the reinforced rock stratum are dynamically monitored in real time, the stability of the reinforced rock stratum and the reliability of the anchor cable are evaluated, and the supporting parameters of the anchor cable are dynamically adjusted according to the evaluation result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306148.2A CN109252881B (en) | 2018-11-05 | 2018-11-05 | Steel pipe cement mortar prestressed anchor cable and supporting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811306148.2A CN109252881B (en) | 2018-11-05 | 2018-11-05 | Steel pipe cement mortar prestressed anchor cable and supporting method thereof |
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| Publication Number | Publication Date |
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| CN109252881A CN109252881A (en) | 2019-01-22 |
| CN109252881B true CN109252881B (en) | 2023-08-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110295936B (en) * | 2019-06-18 | 2020-11-03 | 山东科技大学 | Shaftless spiral sheet type expansion restraining pipe and using method thereof |
| CN110617080B (en) * | 2019-09-10 | 2020-12-29 | 太原理工大学 | Narrow coal pillar anchor cable wall type reinforcing device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0996198A (en) * | 1995-09-29 | 1997-04-08 | Shimizu Corp | Ps anchor fixing method and anchor fixing member used in the method |
| US5689923A (en) * | 1995-04-11 | 1997-11-25 | Hilti Aktiengeschaft | Device for securing steel reinforcing or prestressing members in an anchorage |
| KR20090013528A (en) * | 2007-08-02 | 2009-02-05 | 주식회사 스마텍엔지니어링 | The prestressed tunnel support structure |
| CN102392443A (en) * | 2011-10-19 | 2012-03-28 | 山东科技大学 | Construction technique for high-slope pressure-dispersed pre-stressed anchor cable |
| CN103321663A (en) * | 2013-02-28 | 2013-09-25 | 新汶矿业集团有限责任公司 | Roadway baseboard anchoring and top pouring type pre-stressed anchor cable strengthening device and construction method |
| CN107905260A (en) * | 2017-12-01 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | A kind of prestressed anchor Cable Structure suitable for crane beam on rock wall for underground power house position |
-
2018
- 2018-11-05 CN CN201811306148.2A patent/CN109252881B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5689923A (en) * | 1995-04-11 | 1997-11-25 | Hilti Aktiengeschaft | Device for securing steel reinforcing or prestressing members in an anchorage |
| JPH0996198A (en) * | 1995-09-29 | 1997-04-08 | Shimizu Corp | Ps anchor fixing method and anchor fixing member used in the method |
| KR20090013528A (en) * | 2007-08-02 | 2009-02-05 | 주식회사 스마텍엔지니어링 | The prestressed tunnel support structure |
| CN102392443A (en) * | 2011-10-19 | 2012-03-28 | 山东科技大学 | Construction technique for high-slope pressure-dispersed pre-stressed anchor cable |
| CN103321663A (en) * | 2013-02-28 | 2013-09-25 | 新汶矿业集团有限责任公司 | Roadway baseboard anchoring and top pouring type pre-stressed anchor cable strengthening device and construction method |
| CN107905260A (en) * | 2017-12-01 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | A kind of prestressed anchor Cable Structure suitable for crane beam on rock wall for underground power house position |
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| CN109252881A (en) | 2019-01-22 |
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