CN115787639A - Be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope - Google Patents
Be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope Download PDFInfo
- Publication number
- CN115787639A CN115787639A CN202211641146.5A CN202211641146A CN115787639A CN 115787639 A CN115787639 A CN 115787639A CN 202211641146 A CN202211641146 A CN 202211641146A CN 115787639 A CN115787639 A CN 115787639A
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- China
- Prior art keywords
- anchor rod
- willow leaf
- wall
- dispersion type
- stock
- 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
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- 239000006185 dispersion Substances 0.000 title claims abstract description 15
- 239000011435 rock Substances 0.000 title claims description 9
- 241000124033 Salix Species 0.000 claims abstract description 56
- 238000004873 anchoring Methods 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 241000646858 Salix arbusculoides Species 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 description 10
- 239000011440 grout Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 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
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Images
Classifications
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- 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
Abstract
The invention discloses a multistage pressure dispersion type uplift anchor rod suitable for a rocky slope, which comprises an anchor rod, wherein a plurality of self-anchoring mechanisms are arranged on the anchor rod along the length direction of the anchor rod; the self-anchoring mechanism comprises a plurality of willow leaf support assemblies, the plurality of willow leaf support assemblies are circumferentially arranged on the outer wall of the anchor rod and are positioned on the same plane, one ends of the plurality of willow leaf support assemblies are movably connected with the outer wall of the anchor rod, and the movable states of the plurality of willow leaf support assemblies are in an umbrella-shaped form.
Description
Technical Field
The invention relates to the field of rock slope prevention and control, in particular to a multistage pressure dispersion type uplift anchor rod suitable for a rock slope.
Background
The anchor rod is used as a tension member penetrating into the stratum, one end of the anchor rod is connected with an engineering structure, the other end of the anchor rod penetrates into the rock stratum, the whole anchor rod is divided into a free section and an anchoring section, the free section is an area for transmitting the tension at the head of the anchor rod to an anchoring body, and the function of the free section is to apply prestress on the anchor rod; the anchoring section is an area where the prestressed tendons and the rock are bonded by cement paste, and has the functions of increasing the bonding friction effect of the anchoring body and the soil layer, increasing the bearing effect of the anchoring body and transmitting the tensile force of the free section to the deep part of the soil body.
In mountain areas of China, rock cutting slopes often appear when road projects are built. When the slope rate of the cutting slope is large, a certain slope reinforcement measure needs to be taken to keep the overall stability of the slope, and the prestressed anchor rod supporting mode is widely applied to engineering in recent years as a common slope supporting means.
The stock must provide sufficient anchor bearing capacity to geotechnical engineering, just can ensure that construction safety goes on, because the stock slip casting receives stock design and technology influence itself, hardly accomplishes the slip casting full to it is inhomogeneous to transmit power to the anchor section, even can not reach grout and stock anchor power, the stock is pulled out engineering problem usually appears.
Disclosure of Invention
The invention aims to provide a multistage pressure dispersion type uplift anchor rod suitable for a rock slope, and aims to solve or improve at least one of the technical problems.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a multistage pressure dispersion type uplift anchor rod suitable for a rocky slope, which comprises an anchor rod, wherein a plurality of self-anchoring mechanisms are arranged on the anchor rod along the length direction of the anchor rod;
the self-anchoring mechanism comprises a plurality of willow leaf support assemblies, the plurality of willow leaf support assemblies are circumferentially arranged on the outer wall of the anchor rod and are positioned on the same plane, one ends of the plurality of willow leaf support assemblies are movably connected with the outer wall of the anchor rod, and the plurality of willow leaf support assemblies are in an umbrella-shaped movable state.
Preferably, the self-anchoring mechanism further comprises a vertical frame lantern ring, the vertical frame lantern ring is fixedly sleeved on the outer wall of the anchor rod, and the plurality of willow leaf support assemblies are arranged on the outer wall of the vertical frame lantern ring.
Preferably, the willow leaf support component comprises two support side plates which are symmetrically arranged in parallel, the support side plates are fixedly connected to the outer wall of the lantern ring of the vertical frame, and the support side plates are connected with the willow leaf arms through rotating shafts in a rotating mode.
Preferably, a spring is fixedly connected between the willow leaf arm and any one of the support side plates.
Preferably, the top ends of the two bracket side plates are fixedly connected with limiting plates, and the limiting plates are detachably connected with the willow leaf arms.
Preferably, the two sides of the vertical frame lantern ring are respectively abutted with a plurality of limiting reinforcing steel bars, and the limiting reinforcing steel bars are fixedly connected to the outer wall of the anchor rod.
The invention discloses the following technical effects: through set up a plurality of self-anchoring mechanisms on the stock, in inserting the stock anchor hole, a plurality of willow leaf bracket subassemblies in the self-anchoring mechanism are umbelliform expand spill and the contact of anchor hole inner wall, improve the withdrawal resistance, and can make the stock be in the anchor hole central point and put, in order to improve the slip casting speed, the thick liquid body thickness is wrapped up in to the peripheral nest of stock, ensure that the downthehole slip casting of stock is full, and simultaneously, a plurality of self-anchoring mechanisms can improve the adhesion stress between stock and the grout, and utilize willow leaf bracket subassembly to transmit the slip casting body of stock anchoring section with the dispersion pressure form with the load, make stock anchoring section slip casting body pressurized take place to expand and be in three-dimensional compressive stress state, the withdrawal resistance of stock is improved, thereby improve the anchoring force of stock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a bolt layout view of the present invention;
FIG. 2 is a vertical layout of the self trade organization of the present invention;
FIG. 3 is a floor plan of the self trade organization of the present invention;
in the figure: 1. a standing lantern ring; 2. a rotating shaft; 3. a bracket side plate; 4. a limiting plate; 5. willow leaf arms; 6. a spring; 7. an anchor rod; 8. grouting; 9. and limiting the reinforcing steel bars.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1 to 3, the present embodiment provides a multistage pressure dispersion type uplift anchor rod suitable for a rocky slope, including an anchor rod 7, where a plurality of self-anchoring mechanisms are arranged on the anchor rod 7 along a length direction thereof;
the self-anchoring mechanism comprises a plurality of willow leaf support assemblies, the plurality of willow leaf support assemblies are circumferentially arranged on the outer wall of the anchor rod 7 and are located on the same plane, one ends of the plurality of willow leaf support assemblies are movably connected with the outer wall of the anchor rod 7, and the plurality of willow leaf support assemblies are in an umbrella-shaped moving state.
Through set up a plurality of self anchor mechanisms on stock 7, in inserting stock 7 in the anchor hole, a plurality of willow leaf bracket components in the self anchor mechanism are umbelliform diffusion and anchor hole inner wall contact, improve the withdrawal resistance, and can make stock 7 be in anchor hole central point, with improve grouting speed, the thick liquid thickness is evenly wrapped up in to the peripheral nest of stock 7, it is plump to ensure the downthehole slip casting of stock, and simultaneously, a plurality of self anchor mechanisms can improve the adhesion force between stock and the grout, and utilize willow leaf bracket component to transmit the slip casting body 8 of stock 7 anchor section with the dispersion pressure form with the load, make 8 pressurized emergence inflation of stock 7 anchor section slip casting body and be in the three-dimensional compressive stress state, improve the withdrawal resistance of stock 7, thereby improve the anchoring force of stock 7.
Further optimize the scheme, still wrap the grudging post lantern ring 1 from anchor mechanism, the grudging post lantern ring 1 is fixed to be cup jointed at 7 outer walls of stock, and a plurality of willow leaf bracket components set up at the grudging post lantern ring 1 outer wall.
Through the outer wall with the 1 rigid coupling of grudging post lantern ring at stock 7 to confirm the position between the 1 of a plurality of grudging post lantern ring, then set up a plurality of willow leaf bracket components on the grudging post lantern ring 1, be convenient for realize forming the multistage resistance to plucking effect on stock 7, be convenient for simultaneously make stock 7 be in the downthehole central point of anchor put, the grudging post lantern ring 1 is convenient for carry out the rigidity to a plurality of willow leaf bracket components simultaneously, makes a plurality of willow leaf bracket components be unified plane, improves the balance of resistance to plucking dynamics.
Furthermore, the space between the plurality of stand lantern rings 1 is 2-3m.
Concrete interval between a plurality of grudging post lantern rings 1 can be according to the actual length setting of stock 7, and can reach through the interval that reduces between a plurality of grudging post lantern rings 1, guarantees the resistance to plucking dynamics of stock 7 under the prerequisite that reduces stock 7 length, realizes reducing drilling length and stock 7 material, saves the cost, improves economic benefits.
Furthermore, the diameter of the stand lantern ring 1 is slightly larger than that of the anchor rod 7 by 1-2mm.
The stand lantern ring 1 and the anchor rod 7 are welded, so that a welding space is conveniently reserved at the stand lantern ring 1, and the welding operation during production is convenient.
Further optimize the scheme, the willow leaf support component includes two parallel symmetry's support curb plate 3, and 3 rigid couplings of support curb plate are on the outer wall of grudging post lantern ring 1, rotate through pivot 2 between two support curb plates 3 and are connected with willow leaf arm 5.
Through setting up two support curb plates 3, be convenient for install pivot 2, can improve the stability of pivot 2 simultaneously to improve the stability of rotating of willow leaf arm 5, improve willow leaf arm 5's resistance to plucking intensity.
Furthermore, the preferred setting of willow leaf arm 5 on every grudging post lantern ring 1 is three, under the prerequisite of guaranteeing to have enough resistance to plucking dynamics, can reduce the cross section of the anchor eye that occupies, and the grout of being convenient for flows through in the anchor eye, realizes after pouring into the grout into, and grout can be full fills in stock 7 and anchor eye, improves the area is wrapped up in to the mortar nest, makes grout parcel each willow leaf arm 5 simultaneously, ensures that willow leaf arm 5 and stock 7 participate in atress in coordination.
Furthermore, the included angle of the three willow leaf arms 5 is preferably 120 degrees.
Therefore, the flowing space of cement paste can be reserved to the maximum extent on the premise of improving the pulling resistance of the anchor rod 7.
Further, the outer end of the arm 5 is preferably horseshoe-shaped.
Therefore, the contact area between the willow leaf arm 5 and the wall of the anchor hole is increased.
In a further optimized scheme, a spring 6 is fixedly connected between the willow leaf arm 5 and any one support side plate 3.
Be convenient for open willow leaf arm 5 is automatic through setting up spring 6, thereby realize that a plurality of willow leaf arm 5 is umbelliform form diffusion, a plurality of willow leaf arm 5 can disperse the pressure form and act on 7 anchor section slip casting bodies 8 of stock, the reinforcing resistance to plucking effect, specifically speaking, thereby when inserting stock 7 in the anchor eye, the pulling force through spring 6 makes the back of willow leaf arm 5 laminate the anchor eye pore wall all the time, the extrusion that receives the anchor eye pore wall is along with stock 7 gliding in the anchor eye, and then realize when upwards spurring stock 7, the automation that can realize willow leaf arm 5 through spring 6 opens.
According to the further optimized scheme, the limiting plates 4 are fixedly connected to the top ends of the two support side plates 3, and the limiting plates 4 are detachably connected with the willow leaf arms 5.
The opening amplitude of the willow leaf arm 5 is limited conveniently by arranging the limiting plate 4, so that the anchor rod 7 is supported better.
Further optimization scheme, the both sides of grudging post lantern ring 1 are the butt respectively and are had a plurality of spacing reinforcing bars 9, and spacing reinforcing bar 9 rigid coupling is on stock 7 outer wall.
All set up a plurality of spacing reinforcing bars 9 through the both sides at the grudging post lantern ring 1, realize that the centre gripping of the grudging post lantern ring 1 is fixed to improved the stability of the grudging post lantern ring 1 on stock 7, avoided when the stock 7 removes and the anchor eye between effort make the grudging post lantern ring 1 not hard up, thereby prevent that the grudging post lantern ring 1 from sliding.
Furthermore, the number of the limiting steel bars 9 on the two sides of the stand lantern ring 1 is preferably three, the length of each limiting steel bar 9 is smaller than 3-5cm of the diameter of each anchor rod 7, and the three limiting steel bars 9 on the two sides of the stand lantern ring 1 are uniformly spaced around the anchor rods 7.
The installation step: the willow leaf arm 5, the rotating shaft 2 and the support side plate 3 are assembled and then welded on the vertical frame lantern ring 1, the limiting plate 4 is welded on the top of the support side plate 3, then the spring 6 is assembled, finally 3 limiting reinforcing steel bars 9 which are smaller than the diameter of the anchor rod and are 3-5cm long are welded on the two sides of the vertical frame lantern ring 1, and the self-anchoring mechanisms of the assemblies are fixedly installed on the anchor rod 7 according to the steps.
The using method comprises the following steps: the grouting guide pipe is directly extended into the bottom of an anchor hole, an anchor rod 7 is inserted into the anchor hole, in the process that the anchor rod 7 penetrates into the anchor hole, the willow leaf arms 5 are slightly closed under the action of the anchor hole wall, the anchor rod 7 enters the anchor hole to reach a designated position, the willow leaf arms 5 are pulled outwards for 5-10cm and are opened under the action of the springs 6, the opening range of the willow leaf arms 5 is controlled through the limiting plates 4, the size of the hole diameter of the anchor hole is just equal to the size of the anchor hole, the multi-stage anti-pulling anchor rod 7 is located in position, the plurality of willow leaf arms 5 form an umbrella shape to disperse pressure acting on an anchoring section, the anti-pulling effect is enhanced, the anchor rod 7 is automatically fixed at the middle position of the anchor hole, the grouting guide pipe is inserted into the anchor rod 7 to inject cement mortar, so that the thickness around the anchor rod 7 is consistent, grouting is ensured to be full, a grouting body 8 is formed, after the grouting body 8 is solidified, the anchor rod 7 and the anchor rod 5 are bonded by the grouting body 8, when an external force is applied, the anchor rod 7 is applied, the anti-pulling force of the anchor rod 7 is reduced, the cost of the anchor rod 7 is reduced, and the anchor rod 7 is reduced.
The invention is mainly suitable for rocky stratum anchor rod anchoring, a plurality of self-anchoring mechanisms are added on the basis of the traditional anchor rod 7, and a multi-stage anti-pulling anchor rod is formed after the self-anchoring mechanisms are bonded with a grouting body 8, so that the anti-pulling force of the anchor rod 7 is improved and full grouting in an anchor hole is ensured.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. The utility model provides a be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope, includes stock (7) its characterized in that: a plurality of self-anchoring mechanisms are arranged on the anchor rod (7) along the length direction of the anchor rod;
the self-anchoring mechanism comprises a plurality of willow leaf support assemblies, the plurality of willow leaf support assemblies are circumferentially arranged on the outer wall of the anchor rod (7) and are positioned on the same plane, one ends of the plurality of willow leaf support assemblies are movably connected with the outer wall of the anchor rod (7), and the plurality of willow leaf support assemblies are in an umbrella-shaped movable state.
2. The multistage pressure dispersion type uplift anchor rod suitable for the rocky slope according to claim 1, wherein: the self-anchoring mechanism is further provided with a vertical frame lantern ring (1), the vertical frame lantern ring (1) is fixedly sleeved on the outer wall of the anchor rod (7), and the willow leaf support components are arranged on the outer wall of the vertical frame lantern ring (1).
3. The multistage pressure dispersion type uplift anchor rod suitable for the rocky slope according to claim 2, wherein: the willow leaf support component comprises two support side plates (3) which are symmetrically arranged in parallel, the support side plates (3) are fixedly connected to the outer wall of the vertical frame lantern ring (1), and a willow leaf arm (5) is rotatably connected between the support side plates (3) through a rotating shaft (2).
4. The multistage pressure dispersion type uplift anchor rod suitable for the rocky slope according to claim 3, wherein: a spring (6) is fixedly connected between the willow leaf arm (5) and any one of the support side plates (3).
5. The multistage pressure dispersion type uplift anchor rod suitable for the rocky slope according to claim 4, wherein: and the top ends of the two bracket side plates (3) are fixedly connected with limiting plates (4), and the limiting plates (4) are detachably connected with the willow leaf arms (5).
6. The multistage pressure dispersion type uplift anchor rod suitable for the rocky slope according to claim 2, wherein: the two sides of the stand lantern ring (1) are respectively connected with a plurality of limiting reinforcing steel bars (9) in a butt mode, and the limiting reinforcing steel bars (9) are fixedly connected to the outer wall of the anchor rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211641146.5A CN115787639A (en) | 2022-12-20 | 2022-12-20 | Be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211641146.5A CN115787639A (en) | 2022-12-20 | 2022-12-20 | Be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope |
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| Publication Number | Publication Date |
|---|---|
| CN115787639A true CN115787639A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211641146.5A Pending CN115787639A (en) | 2022-12-20 | 2022-12-20 | Be applicable to multistage pressure dispersion type resistance to plucking stock of rock matter side slope |
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| CN (1) | CN115787639A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120031433A (en) * | 2010-09-24 | 2012-04-03 | 김민우 | Method of constructing thread bar anchor in bedrock having high uplift resistance force and thread bar anchor used therein |
| CN104179178A (en) * | 2014-08-28 | 2014-12-03 | 南昌工程学院 | Flexible umbrella supporting anchor bolt and method for supporting soil slope thereby |
| CN205444188U (en) * | 2016-01-27 | 2016-08-10 | 中铁第四勘察设计院集团有限公司 | Stock and anchor system |
| WO2018205702A1 (en) * | 2017-05-08 | 2018-11-15 | 江苏景源万河环境科技有限公司 | Variable-diameter reinforcing cage for anchor rod or pile foundation |
| CN113089661A (en) * | 2021-04-21 | 2021-07-09 | 江苏科技大学 | Self-expanding anchor rod and construction method thereof |
-
2022
- 2022-12-20 CN CN202211641146.5A patent/CN115787639A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120031433A (en) * | 2010-09-24 | 2012-04-03 | 김민우 | Method of constructing thread bar anchor in bedrock having high uplift resistance force and thread bar anchor used therein |
| CN104179178A (en) * | 2014-08-28 | 2014-12-03 | 南昌工程学院 | Flexible umbrella supporting anchor bolt and method for supporting soil slope thereby |
| CN205444188U (en) * | 2016-01-27 | 2016-08-10 | 中铁第四勘察设计院集团有限公司 | Stock and anchor system |
| WO2018205702A1 (en) * | 2017-05-08 | 2018-11-15 | 江苏景源万河环境科技有限公司 | Variable-diameter reinforcing cage for anchor rod or pile foundation |
| CN113089661A (en) * | 2021-04-21 | 2021-07-09 | 江苏科技大学 | Self-expanding anchor rod and construction method thereof |
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Effective date of registration: 20230519 Address after: 050021 No. 70 Jianshe South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Applicant after: CSCEC ROAD AND BRIDGE GROUP Co.,Ltd. Applicant after: Gansu Institute of engineering geology Applicant after: Lanzhou Jiaotong University Address before: 730070 No. 88, West Road, Anning District, Lanzhou City, Gansu Province Applicant before: Lanzhou Jiaotong University |
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