CN102359386A - Shearing sleeve type yielding bolt - Google Patents
Shearing sleeve type yielding bolt Download PDFInfo
- Publication number
- CN102359386A CN102359386A CN2011103324846A CN201110332484A CN102359386A CN 102359386 A CN102359386 A CN 102359386A CN 2011103324846 A CN2011103324846 A CN 2011103324846A CN 201110332484 A CN201110332484 A CN 201110332484A CN 102359386 A CN102359386 A CN 102359386A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- shearing
- sleeve
- nuclear
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a shearing sleeve type yielding bolt which is designed into circular long pipes with a large internal diameter and a small internal diameter, wherein a certain quantity of shearing cores among which spacing exists are welded on the surface of a bolt body, the deformation yielding capacity is realized through a mutual shearing function of the shearing core and the small internal diameter section of the sleeve. The bolt body is made of a high-strength material, and a bearing capacity of the bolt can be ensured. The invention can adapt the characteristic of deformation damage of soft rock or a dynamic pressurized roadway, has dual functions of large deformation and constant resistance and higher bearing capacity, and has the advantages of strong pertinence, simplenesss in manufacturing and processing, convenience for operation and favorability in popularization.
Description
Technical field
The present invention relates to the support apparatus of a kind of soft-rock tunnel or workings subject to dy namic pressure, particularly relate to a kind of bushing type pressure-relieving achor bar, belong to geotechnical engineering anchoring field.
Background technology
Pressure-relieving achor bar is the important development direction of supporting under soft-rock tunnel, workings subject to dy namic pressure and other complex conditions.The characteristics of soft rock or workings subject to dy namic pressure distortion require anchor pole that constant anchored force can be provided, and moderate finite deformation that can also suitable for surrounding rock and the equivalent length that is stretched, and make anchor pole can safeguard country rock and unlikely collapsing falls, and good yielding property is arranged again, reach the purpose of supporting.The extending operating principle of pressure-relieving achor bar reduces that the body of rod is extending to slide extending two big types with structural member.Sleeve pipe is the structural member of using always that the elongation ability is provided, and relevant extending anchor pole is more.Sleeve pipe can be arranged at anchor hole and also can be arranged in the anchor hole outward.The pressure-relieving achor bar that people such as Lian Chuanjie proposed in literary composition " high prestressing force pressure-relieving achor bar Numerical Method Study " (2008 the 10th phases of geotechnical engineering journal) is that sleeve pipe is arranged outside anchor hole, promptly between nut and pallet, has increased by one and has let the gland pipe.The outer sleeve pipe of arranging of anchor hole, though simple in structure, it is bigger to receive pallet to install the influence of quality and wall surrounding rock failure, influences effective utilization of drift section simultaneously.Correspondingly, arrange that the stretched anchor pole of sleeve pipe is more in the anchor hole, the 87207128 disclosed tubular type frictions anchor pole that can stretch like the patent No., the body of rod needs be pressed in the sleeve pipe complex structure through mechanical force; The patent No. 89205179.5 disclosed pipe seam formulas anchor pole that can stretch, its body of rod is the steel pipe that cracks, bearing strength is not high, if the steel pipe lateral deformation, then stretch capability reduces; The patent No. 201010196197.2 disclosed constant resistance and large deformation anchor rods are provided with tubular constant-resistance device, but its sleeve is that perfect thread is connected with the body of rod, is unfavorable for realizing the dual-use function of constant-resistance and large deformation, and the manufacture craft of the sleeve and the body of rod is all complicated; The disclosed friction sleeve cartridge type of patent No. 201120066745.X large deformation anchor rod, but its friction teeth is arranged in internal surface of sleeve pipe, and the sleeve complex manufacturing technology is unfavorable for promoting.
Summary of the invention
The object of the present invention is to provide a kind of shear sleeve tubular type pressure-relieving achor bar, the existing extending anchor pole supporting capacity of bushing type is low to solve, constant-resistance and the large deformation function is unbalanced, the problem of the unfavorable popularization of complex structure.
In order to solve the problems of the technologies described above; The present invention provides a kind of shear sleeve tubular type pressure-relieving achor bar that advantages of high bearing capacity possesses constant-resistance and large deformation dual-use function simultaneously that has; The solution that said pressure-relieving achor bar proposes does; A kind of shear sleeve tubular type pressure-relieving achor bar mainly is made up of the body of rod, sleeve pipe, pallet and nut, and said sleeve pipe comprises large diameter section and little internal diameter section; The said body of rod can not pass the little internal diameter section of said sleeve pipe, the large diameter section that can pass said sleeve pipe.
Further, the said body of rod is retained in the said sleeve pipe, and its surface is provided with the shearing nuclear of some, adopts spacing round bolt will be provided with the shank portion of shearing nuclear and is limited in the large diameter section of said sleeve pipe.
The body of rod in the said sleeve pipe is provided with cylindrical stopper; The external diameter of said cylindrical stopper and the large diameter of said sleeve pipe are complementary, and cylindrical stopper can slide in the large diameter section of said sleeve pipe;
The shear strength of said shearing nuclear material is less than the shear strength of said cylindrical stopper and said shell material;
Said shearing nuclear is pressed the axial cross section symmetric arrangement, and every cross section is provided with quantity more than or equal to 2.
Further, can be set to circular arc by said shearing nuclear.
Further, said shearing nuclear is welded on the body of rod.
Adopt the shear sleeve tubular type pressure-relieving achor bar of technique scheme; The sleeve pipe processing and fabricating is simple; Abandoned the labyrinth that adds friction teeth in the sleeve pipe (tube), the welding operation of anchor pole surface shear nuclear is convenient, and anchor pole is regulated and control by pressure energy power easily; Anchor rod body also can adopt high-strength material, can conveniently improve anchor pole integrated carrying ability.
In sum, the present invention is a kind of adaptation soft rock or workings subject to dy namic pressure deformation failure characteristics, possesses large deformation and constant-resistance dual-use function and has with strong points, shear sleeve tubular type pressure-relieving achor bar that fabrication and processing is simple, easy and simple to handle than high bearing capacity simultaneously.
Description of drawings
Fig. 1 is the shear sleeve tubular type pressure-relieving achor bar structural representation that the casing pipe sleeve of the embodiment of the invention 1 is connected to the anchor pole head.
Fig. 2 is the shear sleeve tubular type pressure-relieving achor bar structural representation that the casing pipe sleeve of the embodiment of the invention 2 is connected to the anchor pole tail.
Fig. 3 is the a-a sectional drawing of embodiment anchor pole.
Fig. 4 is the space sketch map of anchor rod body and the mutual socket of sleeve pipe.
The specific embodiment
Below will combine accompanying drawing and specific embodiment that the present invention is explained further details.
Shear sleeve tubular type pressure-relieving achor bar provided by the invention; Anchor bar body 1 can adopt the high-strength deformed steel bar material to process; Anchor pole lets presses the deformation of members ability to come from the mutual shear action of the body of rod 1 surface shear nuclear 5 and sleeve pipe 2 little internal diameter sections; Adopt the end anchorage mode, and form certain prestressing force through installing pallet 3 clamp nuts 4.
Embodiment 1: referring to shown in Figure 1; When sleeve pipe 2 is socketed on the anchor pole head, at first, be generally circular cross-section by the required anchor rod body 1 of anchor Design normative choice screw-thread steel processing roadway support; Process the circular casing 2 of one little one big two kinds of internal diameters then; The little internal diameter of sleeve pipe 2 and the external diameter of anchor rod body 1 are complementary, and the external diameter of the large diameter of sleeve pipe 2 and cylindrical stopper 6 is complementary, and sleeve pipe 2 axial lengths are pressed the suitable deflection of country rock and confirmed; Shearing nuclear 5 through some and spacing are arranged in anchor bar body 1 surface soldered and at rod end welding stopper 6; Make the anchor bar body 1 of suitable length be limited in the large diameter section of sleeve pipe 2; And anchor bar body 1 can only be slided to the path section of sleeve pipe 2 through spacing round bolt 7; So far, accomplish anchor bar body 1 and sleeve pipe 2 sockets; Select the resin anchoring agent of suitable diameter and length to be used for the anchoring of sleeve pipe 2 according to the external diameter of anchor hole aperture and sleeve pipe 2; Should avoid anchor rod body 1 by anchoring bond this moment; When sleeve pipe 2 firm be anchored in the anchor pole head after, begin fastening pallet 3 and carry out pretension with 4 pairs of anchor rod bodies of nut 1.Make anchor pole be in as-drawn during surrouding rock deformation, anchor rod body 1 has the trend that is drawn out sleeve pipe 2, when the shearing resistance of sleeve pipe 2 path sections formation is examined 5 shear strength greater than shearing; Shearing nuclear 5 is cut off; Anchor pole is drawn out and shears the corresponding length of nuclear 5 spacings, and direction is slided outside the hole, shows the pressure energy power that lets; After all shearing nuclears 5 are cut off; Cylindrical stopper 6 will stop the body of rod 1 outside sleeve pipe 2, to slide, and anchor pole just loses and lets compression functions, so far will show and the corresponding high bearing capacity of regular screw threads steel anchor rod.
Embodiment 2: referring to shown in Figure 3; When sleeve pipe 2 is socketed on the anchor pole tail; The processing and the mutual socket of anchor bar body 1 and sleeve pipe 2; Identical with embodiment 1, should select the resin anchoring agent of suitable diameter and length to be used for the end anchorage of the body of rod 1 this moment according to the external diameter of anchor hole aperture and the body of rod 1, and the external surface of sleeve pipe 2 will process screw thread and is used to install pallet 3 and nut 4 at this moment.Anchor pole makes pressure also identical with bearing mechanism and embodiment 1.
Fig. 3 is the a-a sectional drawing of anchor pole among the embodiment 1,2; Sleeve pipe 2 and the size relationship of shearing nuclear 5 have been reflected; The section quantity of shearing nuclear 5 is four situation; This can let the supporting capacity that institute will keep when pressing confirm that the layout of shearing nuclear 5 should be symmetrical in body of rod cross sectional shape according to it, guarantees that all nuclears are stressed even.
Fig. 4 is the space sketch map of anchor rod body and the mutual socket of sleeve pipe, reflected the body of rod 1, sleeve pipe 2, sheared the suit situation of nuclear 5, cylindrical stopper 6.
The present invention is a kind of shear sleeve tubular type pressure-relieving achor bar; The sleeve pipe processing and fabricating of this anchor pole is simple, and the welding operation of anchor pole surface shear nuclear is convenient, and anchor pole is regulated and control by pressure energy power easily; Sleeve pipe is cut to let press also still keeps certain drag, can realize the effective support to soft rock or workings subject to dy namic pressure.
Above embodiment is not a full content of the present invention, is two kinds of different better popularization examples of the present invention, and being equal to that all are done in spirit of the present invention replaced or variation, all will be in protection domain of the present invention.
Claims (4)
1. a shear sleeve tubular type pressure-relieving achor bar mainly is made up of the body of rod (1), sleeve pipe (2), pallet (3) and nut (4), it is characterized in that:
Said sleeve pipe (2) comprises large diameter section (21) and little internal diameter section (22);
The said body of rod (1) can not pass the little internal diameter section (21) of said sleeve pipe (2), can pass the large diameter section (22) of said sleeve pipe (2).
2. a kind of shear sleeve tubular type pressure-relieving achor bar according to claim 1; It is characterized in that: the said body of rod (1) is retained in the said sleeve pipe (2); Its surface is provided with the shearing nuclear (5) of some, adopts spacing round bolt (7) will be provided with the shank portion of shearing nuclear (5) and is limited in the large diameter section (21) of said sleeve pipe (2).
The body of rod in the said sleeve pipe (2) is provided with cylindrical stopper (6); The large diameter of the external diameter of said cylindrical stopper (6) and said sleeve pipe (2) is complementary, and cylindrical stopper (6) can slide in the large diameter section (22) of said sleeve pipe (2);
The shear strength of said shearing nuclear (5) material is less than the shear strength of said cylindrical stopper (6) and said sleeve pipe (2) material;
Said shearing nuclear (5) is pressed the axial cross section symmetric arrangement, and every cross section is provided with quantity more than or equal to 2.
3. shear sleeve tubular type pressure-relieving achor bar according to claim 2 is characterized in that: said shearing nuclear (5) is circular arc.
4. according to claim 2 or 3 described shear sleeve tubular type pressure-relieving achor bars, it is characterized in that: said shearing nuclear (5) is welded on the body of rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103324846A CN102359386A (en) | 2011-10-28 | 2011-10-28 | Shearing sleeve type yielding bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103324846A CN102359386A (en) | 2011-10-28 | 2011-10-28 | Shearing sleeve type yielding bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102359386A true CN102359386A (en) | 2012-02-22 |
Family
ID=45584758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103324846A Pending CN102359386A (en) | 2011-10-28 | 2011-10-28 | Shearing sleeve type yielding bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102359386A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777195A (en) * | 2012-07-06 | 2012-11-14 | 浙江科技学院 | Single steel strand anchor cable unit and orifice yielding device thereof |
| CN102877870A (en) * | 2012-10-18 | 2013-01-16 | 湖南科技大学 | Static and dynamic combined intelligent pre-warning anchor rod |
| CN102953744A (en) * | 2012-11-12 | 2013-03-06 | 杭州图强工程材料有限公司 | Hollow grouting yielding anchor rod |
| CN103541750A (en) * | 2013-10-21 | 2014-01-29 | 辽宁工程技术大学 | Alternately-distributed energy-absorbing overlength combined anchor rod for mining and application method |
| CN103899341A (en) * | 2014-03-28 | 2014-07-02 | 中国矿业大学 | Pressure-bearing type end-anchoring high-pretightening-force anchor rod support method |
| CN103967509A (en) * | 2014-05-15 | 2014-08-06 | 中国矿业大学(北京) | Anchor pipe cable supporting structure capable of bearing lateral shear force |
| CN104453961A (en) * | 2014-11-17 | 2015-03-25 | 成都理工大学 | Pressing seam type friction type constant-resistance anchor rod |
| CN104831724A (en) * | 2015-05-07 | 2015-08-12 | 重庆交通大学 | Large-deformation anchoring device |
| CN105041355A (en) * | 2015-07-29 | 2015-11-11 | 中国科学院武汉岩土力学研究所 | Broaching type rock-burst-resistant anchor rod |
| CN105422152A (en) * | 2015-12-28 | 2016-03-23 | 山东科技大学 | Large-deformation shear-resistant anchor rod and mounting method thereof |
| CN105840223A (en) * | 2016-05-18 | 2016-08-10 | 华侨大学 | Large-deformation self-repairing anti-rockburst anchor rod |
| CN107083772A (en) * | 2017-05-25 | 2017-08-22 | 陕西煤业化工技术研究院有限责任公司 | A kind of internal resistance type metal shearing resistance pressure-release anchor cable device |
| CN107237646A (en) * | 2017-06-28 | 2017-10-10 | 山东科技大学 | The quantitative method for protecting support in large deformation constant resistance supporting grouted anchor bar, anchor cable and tunnel |
| CN108590721A (en) * | 2018-05-14 | 2018-09-28 | 重庆大学 | A kind of adaptively release can anchor pole |
| CN108678788A (en) * | 2018-04-18 | 2018-10-19 | 山东大学 | A kind of body of rod piston increases resistance pressure-relieving achor bar and construction method |
| CN109707425A (en) * | 2019-03-12 | 2019-05-03 | 中铁隆昌铁路器材有限公司 | The frictional pressure-relieving achor bar of the hollow slip casting of prestressing force and method for protecting support |
| CN110629752A (en) * | 2019-08-29 | 2019-12-31 | 江苏科技大学 | Deformation compensation anchor rod and using method thereof |
| CN113739983A (en) * | 2021-07-21 | 2021-12-03 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN114542142A (en) * | 2022-01-11 | 2022-05-27 | 武汉大学 | Self-locking large-deformation energy-absorbing anchor rod and anchor rod device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984937A (en) * | 1987-11-16 | 1991-01-15 | Ingenieure Mayreder, Kraus & Co. Baugesellschaft M.B.H. | Rock bolt |
| SU1620640A1 (en) * | 1989-02-23 | 1991-01-15 | Восточный научно-исследовательский горнорудный институт | Yielding bar support |
| CN102086770A (en) * | 2011-03-15 | 2011-06-08 | 北京科技大学 | Cone resistive friction sleeve large-deformation anchor rod |
| CN102094662A (en) * | 2011-03-15 | 2011-06-15 | 北京科技大学 | Friction sleeve type large deformation anchor rod |
-
2011
- 2011-10-28 CN CN2011103324846A patent/CN102359386A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984937A (en) * | 1987-11-16 | 1991-01-15 | Ingenieure Mayreder, Kraus & Co. Baugesellschaft M.B.H. | Rock bolt |
| SU1620640A1 (en) * | 1989-02-23 | 1991-01-15 | Восточный научно-исследовательский горнорудный институт | Yielding bar support |
| CN102086770A (en) * | 2011-03-15 | 2011-06-08 | 北京科技大学 | Cone resistive friction sleeve large-deformation anchor rod |
| CN102094662A (en) * | 2011-03-15 | 2011-06-15 | 北京科技大学 | Friction sleeve type large deformation anchor rod |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777195A (en) * | 2012-07-06 | 2012-11-14 | 浙江科技学院 | Single steel strand anchor cable unit and orifice yielding device thereof |
| CN102877870A (en) * | 2012-10-18 | 2013-01-16 | 湖南科技大学 | Static and dynamic combined intelligent pre-warning anchor rod |
| CN102953744A (en) * | 2012-11-12 | 2013-03-06 | 杭州图强工程材料有限公司 | Hollow grouting yielding anchor rod |
| CN103541750A (en) * | 2013-10-21 | 2014-01-29 | 辽宁工程技术大学 | Alternately-distributed energy-absorbing overlength combined anchor rod for mining and application method |
| CN103541750B (en) * | 2013-10-21 | 2016-04-20 | 辽宁工程技术大学 | A kind of mining energy-absorption type superlong array anchor pole spaced apart |
| CN103899341B (en) * | 2014-03-28 | 2016-04-20 | 中国矿业大学 | Pressure-bearing type end anchor high pretightening force anchor rod support method |
| CN103899341A (en) * | 2014-03-28 | 2014-07-02 | 中国矿业大学 | Pressure-bearing type end-anchoring high-pretightening-force anchor rod support method |
| CN103967509A (en) * | 2014-05-15 | 2014-08-06 | 中国矿业大学(北京) | Anchor pipe cable supporting structure capable of bearing lateral shear force |
| CN103967509B (en) * | 2014-05-15 | 2016-03-02 | 中国矿业大学(北京) | The anchor tube rope supporting and protection structure of cross shear can be born |
| CN104453961A (en) * | 2014-11-17 | 2015-03-25 | 成都理工大学 | Pressing seam type friction type constant-resistance anchor rod |
| CN104453961B (en) * | 2014-11-17 | 2016-07-27 | 成都理工大学 | A kind of overlapping seam type friction-type constant-resistance anchor pole |
| CN104831724A (en) * | 2015-05-07 | 2015-08-12 | 重庆交通大学 | Large-deformation anchoring device |
| CN104831724B (en) * | 2015-05-07 | 2016-06-29 | 重庆交通大学 | Large deformation anchor |
| CN105041355A (en) * | 2015-07-29 | 2015-11-11 | 中国科学院武汉岩土力学研究所 | Broaching type rock-burst-resistant anchor rod |
| CN105041355B (en) * | 2015-07-29 | 2017-07-28 | 中国科学院武汉岩土力学研究所 | The anti-rock burst anchor pole of broaching formula |
| CN105422152A (en) * | 2015-12-28 | 2016-03-23 | 山东科技大学 | Large-deformation shear-resistant anchor rod and mounting method thereof |
| CN105840223B (en) * | 2016-05-18 | 2018-07-20 | 华侨大学 | A kind of anti-rock burst anchor pole of large deformation selfreparing |
| CN105840223A (en) * | 2016-05-18 | 2016-08-10 | 华侨大学 | Large-deformation self-repairing anti-rockburst anchor rod |
| CN107083772A (en) * | 2017-05-25 | 2017-08-22 | 陕西煤业化工技术研究院有限责任公司 | A kind of internal resistance type metal shearing resistance pressure-release anchor cable device |
| US10975696B2 (en) | 2017-06-28 | 2021-04-13 | Shandong University Of Science And Technology | Grouting anchor bolt and grouting anchor cable for supporting of large deformation and constant resistance and quantitative roadway supporting method |
| CN107237646A (en) * | 2017-06-28 | 2017-10-10 | 山东科技大学 | The quantitative method for protecting support in large deformation constant resistance supporting grouted anchor bar, anchor cable and tunnel |
| CN108678788A (en) * | 2018-04-18 | 2018-10-19 | 山东大学 | A kind of body of rod piston increases resistance pressure-relieving achor bar and construction method |
| CN108590721A (en) * | 2018-05-14 | 2018-09-28 | 重庆大学 | A kind of adaptively release can anchor pole |
| CN109707425A (en) * | 2019-03-12 | 2019-05-03 | 中铁隆昌铁路器材有限公司 | The frictional pressure-relieving achor bar of the hollow slip casting of prestressing force and method for protecting support |
| CN110629752A (en) * | 2019-08-29 | 2019-12-31 | 江苏科技大学 | Deformation compensation anchor rod and using method thereof |
| CN113739983A (en) * | 2021-07-21 | 2021-12-03 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN113739983B (en) * | 2021-07-21 | 2024-01-12 | 安徽理工大学 | Pressure relief threshold detection device of self-discharging pressure formula stock |
| CN114542142A (en) * | 2022-01-11 | 2022-05-27 | 武汉大学 | Self-locking large-deformation energy-absorbing anchor rod and anchor rod device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102359386A (en) | Shearing sleeve type yielding bolt | |
| CN102286975B (en) | Constant-resistance energy-absorbing anchor rod for strengthening large-deformation rock body | |
| CN204001449U (en) | Steel bar connecting structure | |
| CN202360120U (en) | Continuous resistance-increasing deformation anchor rod and continuous resistance-increasing deformation anchor cable | |
| CN202338350U (en) | Novel continuous resistance increasing deformation anchor rod | |
| CN107747500A (en) | A kind of pressure-relieving achor bar | |
| CN200989036Y (en) | Anchoring device | |
| CN104088375B (en) | Buckling restriction steel bar structure | |
| CN202520346U (en) | Novel high-intensity constant-resistance large-deformation anchor rod | |
| CN102434180A (en) | Continuous resistance-increasing deformation anchor rod | |
| CN102678147A (en) | High-strength, constant-resistance extender for anchorage cables and usage thereof | |
| CN102536280A (en) | Resistance-increasing yielding anchor rod | |
| CN202705897U (en) | High strength low retracting anchorage device | |
| CN202338347U (en) | Novel anchor cable | |
| CN102425270A (en) | Major diameter steel strand extruding type ground tackle | |
| CN206987200U (en) | A kind of short grout sleeve of bar connecting | |
| CN106088383B (en) | A kind of longitudinal weakening buckling-restrained energy-consuming device of circular rod type | |
| CN211714375U (en) | Steel bar connecting joint of prefabricated concrete structure | |
| CN204419218U (en) | A kind of novel combination type steel strand anchor rod | |
| CN202299135U (en) | Low-retraction anchor device | |
| CN203034804U (en) | Three-section type water-sealing screw for basement exterior wall | |
| CN102852144B (en) | A kind of novel anchor rod | |
| CN201635185U (en) | Oblique steel support device between beam and column | |
| CN203887081U (en) | End locking structure of expanding mill pull rod | |
| CN204186715U (en) | A kind of metal rod connector for building of improvement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120222 |