CN112942842A - Tensioning method for prestressed reinforcement of corner beam - Google Patents
Tensioning method for prestressed reinforcement of corner beam Download PDFInfo
- Publication number
- CN112942842A CN112942842A CN202110153708.0A CN202110153708A CN112942842A CN 112942842 A CN112942842 A CN 112942842A CN 202110153708 A CN202110153708 A CN 202110153708A CN 112942842 A CN112942842 A CN 112942842A
- Authority
- CN
- China
- Prior art keywords
- steel
- jacks
- prestressed
- box girder
- prestressed reinforcement
- 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
Classifications
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Abstract
The utility model relates to a method for tensioning angle beam prestressed reinforcement, erect the prefabricated steel case roof beam on the vertical reinforcing bar of scaffold frame and second mount pad, the weight of steel case roof beam is shared for the common scaffold frame with vertical reinforcing bar, and install two stretch-draw muscle respectively on the first mount pad and the second mount pad of steel case roof beam, when two jacks are drawn prestressed reinforcement, the steel case roof beam can provide the effort of horizontal direction for two jacks, and the effort that two jacks were applyed respectively on the steel case roof beam offsets each other, provide the holding power for two jacks simultaneously through regarding the steel case roof beam as support piece, thereby provide the fulcrum for the jack, and then replace the mode of fixing with the scaffold frame, be favorable to reducing the probability that bracing member such as scaffold frame takes place to warp the loss ring when stretch-draw prestressed reinforcement.
Description
Technical Field
The application relates to the technical field of archaize building construction, in particular to a method for tensioning prestressed reinforcements of an angle beam.
Background
With the emphasis on the traditional culture of people, the number of archaized buildings with the traditional national culture characteristics built by adopting modern construction methods and processes is gradually increased; in addition, in order to improve the aesthetic property and the quality of the building and reduce the construction cost of the building, a large number of retro style buildings also appear; these archaize buildings have played more and more important effect in contemporary people's production and life, these archaize buildings's eave has very unique characteristics, archaize buildings's aesthetic property has been improved greatly, wing angle structure in the archaize buildings eave is the outstanding embodiment of this kind of traditional architectural style, wing angle structure mainly comprises the angle beam, the eave quantity that has multilayer structure's archaize buildings is unanimous with the building number of piles, the shape is like ancient palace, the general extension area of the lower floor eave of building is wideer, the eave area top-down of each layer diminishes gradually.
In the mutual technology, in the archaizing building construction, the corner beam and the roof are poured together, but in the structure of common reinforced concrete, because the concrete ultimate tensile strain is low, the strain of the steel bar in the member greatly exceeds the ultimate tensile strain of the concrete under the action of use load. The strength of the reinforcing steel bars in the reinforced concrete member is not fully utilized. In order to fully utilize high-strength materials and make up the difference between the tensile strain of concrete and reinforcing steel bars, before the corner beam is poured, a plurality of prestressed reinforcing steel bars are usually arranged in a bundle in a reinforcing cage of the corner beam, anchorage devices are respectively used for fixing two ends of each prestressed reinforcing steel bar, two jacks are respectively used for stretching two ends of each prestressed reinforcing steel bar, then concrete is poured, when the strength of the concrete meets the requirement, the reinforcing steel bars are loosened, the reinforcing steel bars are retracted, and the retraction force of the reinforcing steel bars is utilized to pre-stress the tension area of the concrete. The stored prestressing force firstly counteracts the prestressing force in the concrete in the tension area when the member is subjected to a tensile force generated by an external load, and then the concrete is tensioned as the load increases, so that the elongation of the concrete is limited, and cracks are delayed or not caused to appear.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: because archaize building's corner beam position is higher, need take scaffold diagonal beam to pour the construction usually, when needs use jack to stretch prestressing steel, fix two jacks on the scaffold usually then stretch-draw, the scaffold need provide the effort of horizontal direction for the jack to balanced prestressing steel applies the pulling force in the jack, has bracing member such as scaffold and takes place the risk of bending or damaging, consequently still has the improvement space.
Disclosure of Invention
In order to reduce the probability of deformation and damage of the support member during the stretching of the prestressed reinforcement, the application provides a method for stretching the prestressed reinforcement of the corner beam.
The application provides a method for tensioning prestressed reinforcement of an angle beam, which adopts the following technical scheme:
a tensioning method for prestressed reinforcements of corner beams comprises the following steps:
s1, prefabricating the steel box girder and the mounting seat: the method comprises the following steps that a steel box girder is manufactured in advance, the lower end faces of two ends of the steel box girder are respectively provided with a first mounting seat and a second mounting seat, and a plurality of vertical steel bars embedded in the second mounting seats protrude out of the lower end face of the mounting seats;
s2: preparing operation: a scaffold is built on the lower eave, the scaffold is built upwards to be higher than the angle beam steel reinforcement cage, vertical steel bars protruding out of the lower end face of the second mounting seat are bound and fixed at one end, far away from the scaffold, of the angle beam steel reinforcement cage, and the steel box girder, far away from the vertical steel bars, is fixed on the scaffold, so that the steel box girder is located above the angle beam steel reinforcement cage and is parallel to the angle beam steel reinforcement cage;
s3: embedding prestressed steel bars: inserting a plurality of prestressed reinforcements into the angle beam reinforcement cage in a bundled mode;
s4: installing a jack: respectively installing two jacks on the first installation base and the second installation base, and respectively inserting two ends of the prestressed reinforcement into the jacks;
s5: tensioning prestressed reinforcement: simultaneously starting the two jacks, and stretching the prestressed reinforcement by the two jacks;
s6: pouring concrete;
s7, releasing the prestressed steel bars: and when the concrete is cured to reach the strength not lower than 75% of the designed strength of the concrete, the two jacks withdraw and release the prestressed reinforcement.
By adopting the technical scheme, the prefabricated steel box beam is erected on the vertical steel bars of the scaffold and the second mounting seat, the scaffold and the vertical steel bars share the weight of the steel box beam together, the two tensioning bars are respectively mounted on the first mounting seat and the second mounting seat of the steel box beam, when the two jacks stretch the prestressed steel bars, the steel box beam can provide horizontal acting force for the two jacks, the acting forces respectively applied on the steel box beam by the two jacks are mutually offset, and the steel box beam is used as a support to simultaneously provide supporting force for the two jacks, so that a fulcrum is provided for the jacks, a mode of fixing the scaffold is replaced, and the probability of deformation and damage of support members such as the scaffold during tensioning the prestressed steel bars is favorably reduced; the vertical steel bars can be directly sheared after the concrete of the corner beam reaches a certain strength, and the vertical steel bars left in the corner beam can enhance the structural strength of the corner beam.
Preferably, one side that the second mount pad deviates from first mount pad is provided with the mounting panel, the mounting panel downward sloping sets up, the one end that the scaffold was kept away from to the prestressing steel is towards the crooked setting of mounting panel direction, the through-hole that supplies a plurality of prestressing steel to pass is all seted up to first mount pad and mounting panel.
Through adopting above-mentioned technical scheme, because the mutual ligature of angle beam steel reinforcement cage and the reinforcing bar of eave, the one end that is located the angle beam steel reinforcement cage of eave internal periphery does not have the ground around can supply the second mount pad to stretch into to with prestressing steel kickup, make prestressing steel tip avoid the reinforcing bar net of eave, the prestressing steel of being convenient for is connected with the jack on the mounting panel.
Preferably, the upper end of the steel box girder is provided with two hoisting devices, the two hoisting devices correspond to the two jacks one by one, and the hoisting devices are used for driving the corresponding jacks to move up and down.
By adopting the technical scheme, the lifting device is arranged on the steel box girder in advance and is connected with the jack through the lifting device, so that the jack can be in place by driving the jack to move up and down, and an installer can conveniently perform tensioning operation.
Preferably, the hoisting device comprises a motor, a rotating shaft coaxially connected with the output shaft of the motor, a winding drum coaxially connected with the rotating shaft, and a connecting rope connected with the peripheral surface of the winding drum, wherein the connecting rope is connected with the corresponding counter-pulling machine.
Through adopting above-mentioned technical scheme to order about the pivot through the motor and rotate, thereby drive the reel and carry out the rolling or release to connecting the rope, be convenient for realize the function that reciprocates of jack.
Preferably, a connecting ring is arranged on the peripheral surface of the jack, and a hook connected with the connecting ring is arranged at one end, far away from the winding drum, of the connecting rope.
Through adopting above-mentioned technical scheme, be connected through couple and go-between jack and the hoisting accessory, be favorable to improving jack and hoisting accessory's steadiness.
Preferably, a through hole for the connecting rope to pass through is vertically penetrated through the steel box girder.
Through adopting above-mentioned technical scheme, the perforation has played spacing effect to connecting the rope, is favorable to reducing when steel box girder handling or installation, and the condition that the jack amplitude of rocking is big is favorable to reducing the probability that jack and steel box girder take place fiercely to collide.
Preferably, reinforcing ribs are arranged between the first mounting seat and the steel box girder, between the second mounting seat and the steel box girder and between the second mounting seat and the mounting plate.
Through adopting above-mentioned technical scheme to improve first mount pad and mounting panel stability, be favorable to reducing the cracked probability of mounting panel pressurized.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is an exploded schematic view of an embodiment of the present application.
Description of reference numerals: 1. a steel box girder; 11. perforating; 2. a scaffold; 21. a first mounting seat; 22. a second mounting seat; 221. erecting steel bars; 23. mounting a plate; 3. a jack; 31. a connecting ring; 32. an anchor backing plate; 33. a working anchor; 34. a working clamping piece; 35. a limiting plate; 4. a corner beam reinforcement cage; 5. pre-stressing the steel bars; 6. a hoisting device; 61. a motor; 62. connecting ropes; 621. hooking; 63. a reel; 64. a rotating shaft; 7. reinforcing ribs; 8. and a through hole.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
Referring to fig. 1 and 2, an embodiment of the application discloses a method for tensioning prestressed reinforcements of an angle beam. The method comprises the following steps:
s1, prefabricating the steel box girder and the mounting seat: the steel box girder is manufactured in advance, the lower end faces of two ends of the steel box girder 1 are respectively provided with a first mounting seat 21 and a second mounting seat 22, a plurality of vertical steel bars 221 embedded in the second mounting seats 22 protrude out of the lower end faces of the mounting seats, two hoisting devices 6 are respectively installed and fixed on the upper end face of the steel box girder 1, and two jacks 3 are respectively connected with the two hoisting devices 6.
Referring to fig. 1 and 2, the hoisting device 6 includes a motor 61 fixed on the upper end surface of the steel box girder 1, a rotating shaft 64 coaxially connected with an output shaft of the motor 61, a winding drum 63 coaxially connected with the rotating shaft 64, and a connecting rope 62 connected with the outer peripheral surface of the winding drum 63, the connecting ring 31 is fixed on the outer peripheral surface of the jack 3, a hook 621 is fixed on one end of the connecting rope 62 far away from the winding drum 63, and the hoisting device 6 and the corresponding jack 3 are fixed by hooking the hook 621 with the connecting ring 31. The two jacks 3 are respectively located on the sides of the first mounting base 21 and the second mounting base 22 which face away from each other. The steel box girder 1 has a through hole 11 through which the connection rope 62 passes in a vertical direction.
Referring to fig. 1 and 2, a mounting plate 23 is fixed on one side of the second mounting seat 22 away from the first mounting seat 21, the mounting plate 23 is arranged obliquely downwards, and an included angle of 45 degrees is formed between the mounting plate 23 and the second mounting seat 22. The mounting plate 23 and the first mounting base 21 both have through holes 8 along the thickness direction thereof, and anchor pads 32 for the plurality of prestressed reinforcements 5 to pass through are installed in the two through holes 8.
Referring to fig. 1 and 2, reinforcing ribs 7 are embedded in advance at the corners between the lower end surface of the steel box girder 1 and the side of the first mounting seat 21 facing the second mounting seat 22, between the lower end surface of the steel box girder 1 and the side of the second mounting seat 22 facing the first mounting seat 21, and between the second mounting seat 22 and the mounting plate 23.
S2: preparing operation: put up scaffold frame 2 at the eave of lower floor, scaffold frame 2 upwards puts up to being higher than angle beam steel reinforcement cage 4, fixes the ligature of a plurality of perpendicular reinforcing bars 221 that protrude under the second mount pad 22 terminal surface in the one end that scaffold frame 2 was kept away from to angle beam steel reinforcement cage 4, and steel box girder 1 is kept away from perpendicular reinforcing bar 221 and is fixed in on scaffold frame 2, makes steel box girder 1 be located angle beam steel reinforcement cage 4 top and parallel with angle beam steel reinforcement cage 4.
S3: embedding prestressed reinforcement 5: binding two end parts of a plurality of prestressed reinforcements 5 into bundles by using steel wires by workers, and sequentially penetrating the prestressed reinforcements 5 through the anchor backing plate 32 of the first mounting seat 21 and the angle beam reinforcement cage 4;
s4: installing a jack 3: before the jack 3 is installed, one end of each prestressed reinforcement 5, which is far away from the scaffold 2, is bent upwards and penetrates through an anchor backing plate 32 on the installation plate 23, then the steel wire rope is untied, the end part of each prestressed reinforcement 5 is released, then each conical hole of the working anchorage device 33 is aligned to each prestressed reinforcement 5 and is mutually spliced, and then the working anchorage device 33 slides along the length direction of the prestressed reinforcement 5 and is aligned with a limiting ring of the anchor backing plate 32; then, the working clamping pieces 34 are arranged in the working taper holes one by one, and after the working clamping pieces 34 are installed, a worker uses a matched steel pipe to tap and jack tightly, so that the end faces are flush; then installing a limiting plate 35 to be aligned with the working anchorage device 33 at the front end, starting the motor 61, driving the winding drum 63 to release the connecting rope 62, enabling the two jacks 3 to move downwards and be in place, and enabling the end parts of the prestressed reinforcements 5 to be inserted into the jacks 3; then, a group of tool anchorage devices and working clamping pieces 34 are installed at the rear end of the jack 3 again, paraffin is coated on the surfaces of the working clamping pieces 34 when the working clamping pieces 34 are installed, and the working clamping pieces are lightly tapped and tightly jacked by using matched steel pipes.
S5: tensioning prestressed reinforcement 5: and simultaneously starting the two jacks 3, stretching the prestressed reinforcement 5 by the two jacks 3, and closely paying attention to the working condition of the jack 3 equipment in the tensioning process.
S6: pouring concrete: and pouring concrete into the corner beam reinforcement cage 4 until the concrete covers the corner beam reinforcement cage 4.
S7, releasing the prestressed reinforcement 5: and when the concrete is maintained to be not lower than 75% of the designed strength value of the concrete, the two jacks 3 retreat and release the prestressed reinforcement 5, and finally the tensioning work is finished.
S8: dismantling the steel box girder 1: the worker cuts the vertical bar 221 of the second installation base 22 and removes the scaffold 2.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. A tensioning method for prestressed reinforcements of corner beams is characterized by comprising the following steps: the method comprises the following steps:
s1, prefabricating the steel box girder (1) and the mounting seat: the method comprises the following steps that a steel box girder (1) is manufactured in advance, the lower end faces of two ends of the steel box girder (1) are respectively provided with a first mounting seat (21) and a second mounting seat (22), and a plurality of vertical steel bars (221) embedded in the second mounting seats (22) protrude out of the lower end face of each mounting seat;
s2: preparing operation: a scaffold (2) is built on the eave of the lower layer, the scaffold (2) is built upwards to be higher than the angle beam steel reinforcement cage (4), a vertical steel bar (221) protruding out of the lower end face of the second mounting seat (22) is bound and fixed at one end, far away from the scaffold (2), of the angle beam steel reinforcement cage (4), the steel box girder (1), far away from the vertical steel bar (221), is fixed on the scaffold (2), and the steel box girder (1) is located above the angle beam steel reinforcement cage (4) and is parallel to the angle beam steel reinforcement cage (4);
s3: embedding prestressed steel bars: inserting a plurality of prestressed reinforcements (5) into the angle beam reinforcement cage (4) in a bundled mode;
s4: installing a jack: respectively installing two jacks (3) on a first installation seat (21) and a second installation seat (22), and respectively inserting two ends of a prestressed reinforcement (5) into the jacks (3);
s5: tensioning prestressed reinforcement: simultaneously starting the two jacks (3), and stretching the prestressed reinforcement (5) by the two jacks (3);
s6: pouring concrete;
s7, releasing the prestressed steel bars: and when the concrete is cured to reach not less than 75% of the designed strength value of the concrete, the two jacks (3) retreat and release the prestressed reinforcement (5).
2. A method for tensioning prestressed reinforcement of angle beam according to claim 1, characterized in that: one side that second mount pad (22) deviates from first mount pad (21) is provided with mounting panel (23), mounting panel (23) downward sloping setting, the one end of scaffold frame (2) is kept away from in prestressing steel bar (5) is towards mounting panel (23) direction crooked setting, through-hole (8) that supply a plurality of prestressing steel bar (5) to pass are all seted up in first mount pad (21) and mounting panel (23).
3. A method for tensioning prestressed reinforcement of angle beam according to claim 2, characterized in that: two hoisting devices (6) are arranged at the upper end of the steel box girder (1), the two hoisting devices (6) correspond to the two jacks (3) one by one, and the hoisting devices (6) are used for driving the corresponding jacks (3) to move up and down.
4. A method for tensioning prestressed reinforcement of angle beam according to claim 3, characterized in that: the lifting device (6) comprises a motor (61), a rotating shaft (64) coaxially connected with an output shaft of the motor (61), a winding drum (63) coaxially connected with the rotating shaft (64) and a connecting rope (62) connected with the peripheral surface of the winding drum (63), wherein the connecting rope (62) is connected with a corresponding counter-pulling machine.
5. The method for tensioning the prestressed reinforcement of the corner beam as claimed in claim 4, wherein the method comprises the following steps: the outer peripheral surface of the jack (3) is provided with a connecting ring (31), and one end, far away from the winding drum (63), of the connecting rope (62) is provided with a hook (621) connected with the connecting ring (31).
6. The method for tensioning the prestressed reinforcement of the corner beam as claimed in claim 5, wherein the method comprises the following steps: and a through hole (11) for the connecting rope (62) to pass through is vertically penetrated through the steel box girder (1).
7. A method for tensioning prestressed reinforcement bars (5) for corner beams according to claim 6, characterized in that: and reinforcing ribs (7) are arranged between the first mounting seat (21) and the steel box girder (1), between the second mounting seat (22) and the steel box girder (1) and between the second mounting seat (22) and the mounting plate (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153708.0A CN112942842A (en) | 2021-02-04 | 2021-02-04 | Tensioning method for prestressed reinforcement of corner beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153708.0A CN112942842A (en) | 2021-02-04 | 2021-02-04 | Tensioning method for prestressed reinforcement of corner beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112942842A true CN112942842A (en) | 2021-06-11 |
Family
ID=76243740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110153708.0A Pending CN112942842A (en) | 2021-02-04 | 2021-02-04 | Tensioning method for prestressed reinforcement of corner beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112942842A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116677206A (en) * | 2023-07-19 | 2023-09-01 | 安徽省交通建设股份有限公司 | Prestress tensioning device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202969379U (en) * | 2012-12-13 | 2013-06-05 | 青岛业高建设工程有限公司 | Hoisting support for rock bolt tensioning jack |
| CN205153559U (en) * | 2015-11-05 | 2016-04-13 | 中铁六局集团有限公司 | Cast -in -place roof beam prestressing force tensioning equipment |
| CN107630553A (en) * | 2016-07-18 | 2018-01-26 | 上海奇谋能源技术开发有限公司 | It is a kind of first to open rapid construction device and method for large span floor |
| CN109440929A (en) * | 2018-11-13 | 2019-03-08 | 贵州建工集团第六建筑工程有限责任公司 | A kind of prefabricated traction construction method of installation of roof system stressed arch-bar high-altitude tensioning |
| CN209039993U (en) * | 2018-07-27 | 2019-06-28 | 中国建筑第六工程局有限公司 | A kind of device carrying out the tensioning of great cantilever bent cap using movable supporting frame |
| CN110453603A (en) * | 2019-07-16 | 2019-11-15 | 中冶交通建设集团有限公司 | Overpass crossbeam construction method |
| CN209873586U (en) * | 2019-03-28 | 2019-12-31 | 中铁十二局集团第一工程有限公司 | Position adjusting device for prestress tensioning of finish rolling threaded steel bar |
-
2021
- 2021-02-04 CN CN202110153708.0A patent/CN112942842A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202969379U (en) * | 2012-12-13 | 2013-06-05 | 青岛业高建设工程有限公司 | Hoisting support for rock bolt tensioning jack |
| CN205153559U (en) * | 2015-11-05 | 2016-04-13 | 中铁六局集团有限公司 | Cast -in -place roof beam prestressing force tensioning equipment |
| CN107630553A (en) * | 2016-07-18 | 2018-01-26 | 上海奇谋能源技术开发有限公司 | It is a kind of first to open rapid construction device and method for large span floor |
| CN209039993U (en) * | 2018-07-27 | 2019-06-28 | 中国建筑第六工程局有限公司 | A kind of device carrying out the tensioning of great cantilever bent cap using movable supporting frame |
| CN109440929A (en) * | 2018-11-13 | 2019-03-08 | 贵州建工集团第六建筑工程有限责任公司 | A kind of prefabricated traction construction method of installation of roof system stressed arch-bar high-altitude tensioning |
| CN209873586U (en) * | 2019-03-28 | 2019-12-31 | 中铁十二局集团第一工程有限公司 | Position adjusting device for prestress tensioning of finish rolling threaded steel bar |
| CN110453603A (en) * | 2019-07-16 | 2019-11-15 | 中冶交通建设集团有限公司 | Overpass crossbeam construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116677206A (en) * | 2023-07-19 | 2023-09-01 | 安徽省交通建设股份有限公司 | Prestress tensioning device |
| CN116677206B (en) * | 2023-07-19 | 2024-01-23 | 安徽省交通建设股份有限公司 | Prestress tensioning device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110206143B (en) | Construction method of post-tensioning prestressed assembly concrete frame structure | |
| CN110184941B (en) | Bridge main tower construction method | |
| CN105835226B (en) | A kind of pre-tensioning system precast beam pedestal | |
| CN103835422A (en) | Method for fire-proofing composite slab using wire rope | |
| CN105133830A (en) | Formwork reinforcing system replacing wood with steel and construction technology thereof in external wall construction | |
| CN112942842A (en) | Tensioning method for prestressed reinforcement of corner beam | |
| CN113445743B (en) | Construction method for high-altitude overhanging ascending type concrete structure without jacking formwork | |
| CN111236621A (en) | Fixing system for beam-side embedded overhanging scaffold | |
| CN213836318U (en) | Bridge floor wet joint hangs mould structure | |
| CN110777667A (en) | Hoisting method for preventing deformation of steel pipe arch | |
| KR100439685B1 (en) | Method for reinforcing a bottom slab using wire tension unit | |
| JPH10140872A (en) | Roof constructing method for tower structure | |
| CN210947661U (en) | Installation device of socket type overhanging scaffold | |
| CN108867548B (en) | Construction platform and construction platform erection method for on-site watering high pile wharf | |
| CN112627543A (en) | Shaft inner lifting frame for mounting steel beams of core tube elevator shaft and steel beam construction method | |
| CN105971287A (en) | Vertical prestress construction method of reaction wall | |
| CN112814464A (en) | Construction method for lifting large-scale accident water tower reservoir | |
| CN111576439A (en) | Concrete support dismantling prestressed support and construction method thereof | |
| CN114104989B (en) | Cable buckle integrated tower wind cable system of large-span cable crane and construction method | |
| CN216687245U (en) | Steel truss hanging device for pouring large-span tie beam of high pile cap | |
| CN220365282U (en) | Electric translation type hanging basket | |
| CN113334569B (en) | Tension releasing facility and tension releasing method for pre-tensioned prestressed concrete member | |
| CN220395153U (en) | Attaching structure of attaching lifting scaffold | |
| CN220395134U (en) | High-rise building high-altitude cantilever supporting structure | |
| CN220704330U (en) | Cable body lifting device for steel strand inhaul cable construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210611 |
|
| RJ01 | Rejection of invention patent application after publication |