CN111119233B - Concrete side wall embedded iron part fixing mechanism and using method thereof - Google Patents
Concrete side wall embedded iron part fixing mechanism and using method thereof Download PDFInfo
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- CN111119233B CN111119233B CN201911287416.5A CN201911287416A CN111119233B CN 111119233 B CN111119233 B CN 111119233B CN 201911287416 A CN201911287416 A CN 201911287416A CN 111119233 B CN111119233 B CN 111119233B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 239000004567 concrete Substances 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 59
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims 3
- 230000037431 insertion Effects 0.000 claims 3
- 208000004350 Strabismus Diseases 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/04—Cores for anchor holes or the like around anchors embedded in the concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to the technical field of embedded iron pieces, and discloses a fixing mechanism for an embedded iron piece of a concrete side wall. This concrete side wall pre-buried ironware fixed establishment and application method thereof, be connected fixed plate and iron plate through fixing bolt, hexagon nut's right-hand member inserts the inside of mounting hole, then run through-hole and jack on the backing plate and be connected with hexagon nut with the screw rod, can fix fixed rib and iron plate, make fixed rib be in the position that corresponds with the pre-buried position of wall body, and then fix iron plate and fixed rib, can guarantee the stability of fixed rib, when pouring, fixed rib can not squint, except that iron plate, the thread bush, reuse after other parts except fixed rib and reinforcement all can be demolishd, environmental protection more.
Description
Technical Field
The invention relates to the technical field of embedded iron pieces, in particular to a fixing mechanism for an embedded iron piece of a concrete side wall and a using method of the fixing mechanism.
Background
In recent years, more and more urban underground pipe networks are laid by underground galleries, a plurality of iron parts are often required to be embedded in the side walls of the galleries to meet the functional requirements of installation, hoisting and the like of pipeline bridges, but the embedded positions of the iron parts of the side walls are not easy to fix in the prior construction, the iron parts are disturbed in the process of pouring concrete after a formwork is erected, the positions of the iron parts deviate and are even embedded into the concrete, and the construction requirements cannot be met. In order to solve the phenomenon, the invention provides a fixing method of an embedded iron piece, which effectively prevents the embedded iron piece from moving and ensures the accuracy of the position of the embedded iron piece.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a fixing mechanism for an embedded iron part of a concrete side wall and a using method thereof, which have the advantages of effectively preventing the embedded iron part from moving, ensuring the accuracy of the position of the embedded iron part and the like, and solve the problems that the embedded iron part of the side wall is not easy to fix in construction, the iron part is disturbed in the process of pouring concrete after a formwork is erected, the position of the iron part is deviated and even embedded into the concrete, and the construction requirements cannot be met.
(II) technical scheme
In order to achieve the purposes of effectively preventing the embedded part from moving and ensuring the position accuracy of the embedded part, the invention provides the following technical scheme: a concrete side wall pre-buried iron member fixing mechanism comprises a screw, a base plate, a template, a fixing plate, a hexagon nut, an iron plate, a threaded sleeve, a fixing rib and a wall body, wherein the fixing rib is embedded in the wall body, the threaded sleeve is in threaded connection with the outer portion of the left end of the fixing rib, and the threaded sleeve is welded on the right side wall of the iron plate;
the fixed plate is fixedly connected with the left side wall of the iron plate through a fixing bolt, the hexagonal nut is welded in the middle of the fixed plate and is matched with the screw rod, the hexagonal nut is inserted in the middle of the template, the backing plate is located on the left side of the template, and the right end of the screw rod sequentially penetrates through the backing plate and the template from left to right and is in threaded connection with the hexagonal nut.
Preferably, the middle part of backing plate is seted up the through-hole that corresponds with the screw rod, the middle part of template is seted up the jack with the through-hole intercommunication, hexagon nut's left end extends to the inside of jack, the right-hand member of screw rod runs through-hole and jack and with hexagon nut threaded connection.
Preferably, the middle part of the iron plate is provided with a mounting hole, and the right end of the hexagonal nut is inserted into the mounting hole.
Preferably, the top and the bottom of the fixing plate are both provided with positioning holes, the left side wall of the iron plate is provided with positioning grooves corresponding to the positioning holes, the fixing bolt is in threaded connection with the inside of the positioning holes, and the right end of the fixing bolt is in threaded connection with the positioning grooves.
Preferably, the right side wall of the template is provided with a clamping groove corresponding to the fixing plate, and the fixing plate is clamped in the clamping groove.
Preferably, the number of the thread bushings is set to be not less than four, and the thread bushings are uniformly arranged on the right side wall of the iron plate.
Preferably, the right end of the fixing rib is fixedly connected with a reinforcing piece, and the reinforcing piece is triangular.
The invention provides a use method of a fixing mechanism for an embedded iron part of a concrete side wall, which comprises the following steps:
preparation work A: firstly, forming an opening corresponding to the hexagon nut in the middle of the fixing plate by using punching equipment, welding the hexagon nut in the opening to enable the left end and the right end of the hexagon nut to extend to the outside of the opening, then respectively excavating jacks and through holes corresponding to the hexagon nut on the template and the base plate by using the punching equipment, and welding a plurality of thread sleeves on the right side surface of the iron plate;
b, construction preparation: screwing in the fixing ribs with corresponding number according to the requirement, connecting the fixing plate with the iron plate through the fixing bolts, inserting the right end of the hexagon nut into the mounting hole, penetrating the screw rod through the through hole and the inserting hole in the base plate and connecting the screw rod with the hexagon nut, and fixing the fixing ribs and the iron plate to enable the fixing ribs to be located at the positions corresponding to the wall pre-embedding positions;
c, pouring: pouring work is carried out on the right side of the template, and after the pouring work is finished and the template is dried, the wall body with the embedded fixing ribs and the embedded reinforcing parts can be obtained;
d, dismantling: after the wall body is formed, the screw rod can be screwed out, the base plate and the template can be detached, then the fixing bolt can be detached from the fixing plate and the hexagon nut after being selected, and then the mounting hole is plugged.
(III) advantageous effects
Compared with the prior art, the invention provides a fixing mechanism for a pre-buried iron part of a concrete side wall and a using method thereof, and the fixing mechanism has the following beneficial effects:
1. this pre-buried iron part fixed establishment of concrete side wall and application method thereof, be connected fixed plate and iron plate through fixing bolt, hexagon nut's right-hand member inserts the inside of mounting hole, then run through-hole and jack on the backing plate and be connected with hexagon nut with the screw rod, can fix fixed rib and iron plate for fixed rib is in the position that corresponds with the pre-buried position of wall body, and then fixes iron plate and fixed rib, can guarantee the stability of fixed rib, when pouring, fixed rib can not squint.
2. According to the fixing mechanism for the pre-buried iron part of the concrete side wall and the using method of the fixing mechanism, other parts except the iron plate, the threaded sleeve, the fixing rib and the reinforcing part can be detached and then recycled, and the fixing mechanism is more environment-friendly.
Drawings
Fig. 1 is a schematic structural view of a fixing mechanism for a pre-buried iron member of a concrete side wall according to the present invention;
fig. 2 is a schematic view of a connection structure of a fixing plate and an iron plate in the fixing mechanism for the pre-buried iron members of the concrete side wall according to the invention;
FIG. 3 is an enlarged view of A of FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of B of FIG. 1 according to the present invention.
In the figure: 1. a screw; 2. a base plate; 3. a template; 4. a fixing plate; 5. a hexagonal nut; 6. an iron plate; 7. a threaded sleeve; 8. fixing ribs; 9. a wall body; 10. a through hole; 11. a jack; 12. mounting holes; 13. positioning holes; 14. fixing the bolt; 15. positioning a groove; 16. a card slot; 17. a reinforcement.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a concrete side wall pre-embedded iron member fixing mechanism comprises a screw 1, a base plate 2, a template 3, a fixing plate 4, a hexagon nut 5, an iron plate 6, a thread bush 7, a fixing rib 8 and a wall body 9, wherein the fixing rib 8 is embedded in the wall body 9, the thread bush 7 is in threaded connection with the outer portion of the left end of the fixing rib 8, the thread bush 7 is welded on the right side wall of the iron plate 6, the number of the thread bushes 7 is not less than four, and a plurality of thread bushes 7 are uniformly arranged on the right side wall of the iron plate 6, the number of the fixing ribs 8 to be installed can be adjusted according to needs, so that the whole device is stronger in controllability and stronger in adaptability during use;
the fixing plate 4 is fixedly connected with the left side wall of the iron plate 6 through a fixing bolt 14, a hexagon nut 5 is welded in the middle of the fixing plate 4, the hexagon nut 5 is matched with the screw rod 1, the hexagon nut 5 is inserted in the middle of the template 3, the backing plate 2 is positioned on the left side of the template 3, the right end of the screw rod 1 sequentially penetrates through the backing plate 2 and the template 3 from left to right and is in threaded connection with the hexagon nut 5, the fixing plate 4 is connected with the iron plate 6 through the fixing bolt 14, the right end of the hexagon nut 5 is inserted into the mounting hole 12, then the screw rod 1 penetrates through a through hole 10 and a jack 11 on the backing plate 2 and is connected with the hexagon nut 5, the fixing ribs 8 and the iron plate 6 can be fixed, the fixing ribs 8 are positioned at positions corresponding to the pre-embedded positions of the wall body 9, the pre-embedded parts can be effectively fixed, the positions of the pre-embedded parts can be conveniently adjusted, and the stability of the fixing ribs 8 can also be ensured, the device does not shift during pouring.
Backing plate 2 pads between screw rod 1 and template 3, can increase the stability that screw rod 1 and template 3 are connected, the through-hole 10 that corresponds with screw rod 1 is seted up at the middle part of backing plate 2, jack 11 with through-hole 10 intercommunication is seted up at the middle part of template 3, hexagon nut 5's left end extends to the inside of jack 11, screw rod 1's right-hand member run through-hole 10 and jack 11 and with hexagon nut 5 threaded connection, make hexagon nut 5 firmly together with template 3 fixing, and then fix iron plate 6 and fixed rib 8, can guarantee fixed rib 8's stability, when pouring, fixed rib 8 can not squint.
Fixed rib 8 is the built-in fitting promptly, can bury underground in the inside of wall body 9, and the right-hand member fixedly connected with reinforcement 17 of fixed rib 8, reinforcement 17 are three horn shapes, and the setting up of reinforcement 17 can increase the stability that fixed rib 8 and wall body 9 are connected on the one hand, can also conveniently rotate fixed rib 8 for fixed rib 8 is more convenient with being connected of thread bush 7.
The invention provides a use method of a fixing mechanism for an embedded iron part of a concrete side wall, which comprises the following steps:
preparation work A: firstly, forming an opening corresponding to the hexagon nut 5 in the middle of the fixing plate 4 by using punching equipment, then welding the hexagon nut 5 in the opening, so that the left end and the right end of the hexagon nut 5 extend to the outside of the opening, then respectively excavating a jack 11 and a through hole 10 corresponding to the hexagon nut 5 on the template 3 and the base plate 2 by using the punching equipment, and welding a plurality of thread sleeves 7 on the right side surface of the iron plate 6;
b, construction preparation: screwing in a corresponding number of fixing ribs 8 as required, connecting the fixing plate 4 with the iron plate 6 through fixing bolts 14, inserting the right end of the hexagon nut 5 into the mounting hole 12, penetrating the screw 1 through the through hole 10 and the inserting hole 11 on the backing plate 2 and connecting the screw with the hexagon nut 5, and fixing the fixing ribs 8 and the iron plate 6 to enable the fixing ribs 8 to be located at positions corresponding to the embedded positions of the wall 9;
c, pouring: pouring work is carried out on the right side of the template 3, and after the pouring work is finished and the template is dried, a wall body 9 with the fixing ribs 8 and the reinforcing parts 17 embedded in the wall body can be obtained;
d, dismantling: after the wall body 9 is formed, the screw rod 1 can be screwed out, the backing plate 2 and the template 3 can be detached, then the fixing bolt 14 can be selected, the fixing plate 4 and the hexagon nut 5 can be detached, and then the mounting hole 12 is plugged.
The invention has the beneficial effects that: fixing ribs 8 with corresponding number are screwed in according to needs, then the fixing plate 4 is connected with the iron plate 6 through fixing bolts 14, the right end of the hexagon nut 5 is inserted into the mounting hole 12, then the screw 1 penetrates through the through hole 10 and the jack 11 on the base plate 2 and is connected with the hexagon nut 5, the fixing ribs 8 and the iron plate 6 can be fixed, the fixing ribs 8 are located at positions corresponding to the pre-embedded positions of the wall body 9, and then the iron plate 6 and the fixing ribs 8 are fixed, the stability of the fixing ribs 8 can be guaranteed, and the fixing ribs 8 cannot deviate when pouring is carried out;
except for the iron plates 6, the thread sleeves 7, the fixing ribs 8 and the reinforcing parts 17, other parts can be detached and recycled, and the novel iron-core-shell-type steel-bar reinforced concrete structure is more environment-friendly.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a pre-buried ironware fixed establishment of concrete side wall, includes screw rod (1), backing plate (2), template (3), fixed plate (4), hexagon nut (5), iron plate (6), thread bush (7), fixed rib (8) and wall body (9), its characterized in that: the fixing ribs (8) are embedded in the wall body (9), the threaded sleeve (7) is in threaded connection with the outer portion of the left end of the fixing ribs (8), and the threaded sleeve (7) is welded on the right side wall of the iron plate (6);
the fixing plate (4) is fixedly connected with the left side wall of the iron plate (6) through a fixing bolt (14), the hexagonal nut (5) is welded in the middle of the fixing plate (4), the hexagonal nut (5) is matched with the screw rod (1), the hexagonal nut (5) is inserted in the middle of the template (3), the backing plate (2) is located on the left side of the template (3), and the right end of the screw rod (1) sequentially penetrates through the backing plate (2) and the template (3) from left to right and is in threaded connection with the hexagonal nut (5);
the middle part of the backing plate (2) is provided with a through hole (10) corresponding to the screw rod (1), the middle part of the template (3) is provided with an insertion hole (11) communicated with the through hole (10), the left end of the hexagonal nut (5) extends to the inside of the insertion hole (11), and the right end of the screw rod (1) penetrates through the through hole (10) and the insertion hole (11) and is in threaded connection with the hexagonal nut (5);
the middle part of the iron plate (6) is provided with a mounting hole (12), and the right end of the hexagonal nut (5) is inserted into the mounting hole (12);
positioning holes (13) are formed in the top and the bottom of the fixing plate (4), positioning grooves (15) corresponding to the positioning holes (13) are formed in the left side wall of the iron plate (6), the fixing bolts (14) are connected inside the positioning holes (13) in a threaded mode, and the right ends of the fixing bolts (14) are connected with the positioning grooves (15) in a threaded mode;
a clamping groove (16) corresponding to the fixing plate (4) is formed in the right side wall of the template (3), and the fixing plate (4) is clamped in the clamping groove (16);
a use method of a fixing mechanism for pre-buried iron parts of a concrete side wall comprises the following steps:
preparation work A: firstly, an opening corresponding to the hexagonal nut (5) is formed in the middle of the fixing plate (4) through punching equipment, then the hexagonal nut (5) is welded inside the opening, the left end and the right end of the hexagonal nut (5) extend to the outside of the opening, then jacks (11) and through holes (10) corresponding to the hexagonal nut (5) are respectively excavated in the template (3) and the base plate (2) through the punching equipment, and a plurality of thread sleeves (7) are welded on the right side face of the iron plate (6);
b, construction preparation: the fixing ribs (8) with corresponding number are screwed in as required, then the fixing plate (4) is connected with the iron plate (6) through the fixing bolts (14), the right end of the hexagonal nut (5) is inserted into the mounting hole (12), then the screw (1) penetrates through the through hole (10) and the jack (11) in the base plate (2) and is connected with the hexagonal nut (5), and the fixing ribs (8) and the iron plate (6) can be fixed, so that the fixing ribs (8) are located at positions corresponding to the embedded positions of the wall body (9);
c, pouring: pouring work is carried out on the right side of the template (3), and after pouring is finished and air-dried, the wall body (9) with the fixing ribs (8) and the reinforcing parts (17) embedded in the wall body can be obtained;
d, dismantling: after the wall body (9) is formed, the screw rod (1) is screwed out, the base plate (2) and the template (3) can be detached, then the fixing bolt (14) is screwed out, the fixing plate (4) and the hexagon nut (5) can be detached, and then the mounting hole (12) is plugged.
2. The fixing mechanism for the embedded iron pieces of the concrete side wall as claimed in claim 1, is characterized in that: the number of the thread sleeves (7) is set to be not less than four, and the thread sleeves (7) are uniformly arranged on the right side wall of the iron plate (6).
3. The fixing mechanism for the embedded iron pieces of the concrete side wall as claimed in claim 1, is characterized in that: the right-hand member fixedly connected with reinforcement (17) of fixed rib (8), reinforcement (17) are the triangle-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911287416.5A CN111119233B (en) | 2019-12-14 | 2019-12-14 | Concrete side wall embedded iron part fixing mechanism and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911287416.5A CN111119233B (en) | 2019-12-14 | 2019-12-14 | Concrete side wall embedded iron part fixing mechanism and using method thereof |
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| Publication Number | Publication Date |
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| CN111119233A CN111119233A (en) | 2020-05-08 |
| CN111119233B true CN111119233B (en) | 2022-02-11 |
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| CN201911287416.5A Active CN111119233B (en) | 2019-12-14 | 2019-12-14 | Concrete side wall embedded iron part fixing mechanism and using method thereof |
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| CN113733309A (en) * | 2021-07-27 | 2021-12-03 | 新城控股集团实业发展有限公司 | Laminated slab reinforcing steel bar hole plugging structure and construction method thereof |
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| CN106968270A (en) * | 2017-02-28 | 2017-07-21 | 中国十七冶集团有限公司 | A kind of reinforcement means that embedded iron parts are lengthened for underground pipe gallery side wall |
| CN108571011A (en) * | 2018-05-31 | 2018-09-25 | 山东建筑大学 | A kind of casting system and casting method of fit drawing die plate minitype underground pipe gallery |
| CN209760459U (en) * | 2018-12-28 | 2019-12-10 | 中国二冶集团有限公司 | Wall embedded part |
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2019
- 2019-12-14 CN CN201911287416.5A patent/CN111119233B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010007280A (en) * | 2008-06-25 | 2010-01-14 | Yakumo Kk | Vibration-proof separator |
| CN103132494A (en) * | 2011-11-25 | 2013-06-05 | 中国葛洲坝集团股份有限公司 | Embedded anchor cone accurate positioning method |
| KR20140021288A (en) * | 2012-08-09 | 2014-02-20 | 동아이엔지(주) | Sleeve lib joint usable with precast concrete, manufacturing method for precast concrete having the same, and installing method for precast concreat structure having the same |
| CN103255840A (en) * | 2013-04-28 | 2013-08-21 | 江苏省华建建设股份有限公司 | Combined built-in fitting for concrete walls and column tie bars and installation construction method thereof |
| CN106968270A (en) * | 2017-02-28 | 2017-07-21 | 中国十七冶集团有限公司 | A kind of reinforcement means that embedded iron parts are lengthened for underground pipe gallery side wall |
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| CN111119233A (en) | 2020-05-08 |
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