CN221168742U - Steel strand laying device of pretensioned beam - Google Patents
Steel strand laying device of pretensioned beam Download PDFInfo
- Publication number
- CN221168742U CN221168742U CN202323190076.9U CN202323190076U CN221168742U CN 221168742 U CN221168742 U CN 221168742U CN 202323190076 U CN202323190076 U CN 202323190076U CN 221168742 U CN221168742 U CN 221168742U
- Authority
- CN
- China
- Prior art keywords
- steel strand
- plate
- guiding device
- clamping
- steel
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 141
- 239000010959 steel Substances 0.000 title claims abstract description 141
- 238000003825 pressing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The utility model relates to a steel strand laying device of a pretensioned beam, which comprises a support frame, wherein a steel strand threading machine is arranged on the support frame, a first steel strand guiding device is arranged on one side of the steel strand threading machine, a guide rail is arranged on one side of the first steel strand guiding device, a first guide rod is arranged at one end of the guide rail, a first slide pipe is arranged on the first guide rod, a second steel strand guiding device is arranged on the first slide pipe, a tractor is arranged on the guide rail, a second guide rod is arranged on the tractor, a second slide pipe is arranged on the second guide rod, a single Kong Mao is arranged on the second slide pipe, a tool clamping piece group is arranged in the single Kong Mao, and the first steel strand guiding device and the second steel strand guiding device comprise a first fixing plate, a second fixing plate, a first roller and a second roller arranged on the first guide rod. The utility model can repeatedly put steel strands with preset lengths, is convenient to adjust and use, and has wide market prospect.
Description
Technical Field
The utility model relates to the field of steel strand placement equipment of pretensioned beams, in particular to a steel strand laying device of a pretensioned beam.
Background
The pretensioning method and the post-tensioning method are only different in construction means, and the mechanical properties are not obviously different. The middle and small pre-stressing members are usually pretensioned, and the large pre-stressing members are usually post-tensioned. The pre-tensioning method is characterized in that the tensioned prestressed reinforcement is directly poured into concrete, and the prestress is transferred by means of the binding force between the prestressed reinforcement and surrounding concrete. The prestressed reinforcement of the unbonded prestressed concrete is completely dependent on the end anchor to transfer the prestress. When the concrete of the prestressed concrete hollow slab beam reaches the tensile strength required by design, the steel strands are cut and expanded from the two sides of the slab beam symmetrically to the middle according to the failure length of the steel strands at the center of the prefabricated slab beam pedestal or the two ends of the middle prefabricated slab beam, and then the failure pipe is cut and expanded. When 25% of the total steel strands are cut off, the total sectional area of the steel strands which are tightly stressed is reduced by 25%, and then the rest steel strands can generate stress redistribution at the position of the cut-off section of the steel strands, namely the stress of the rest steel strands is increased by 25%, the standard strength of the steel strands is not exceeded, the rest steel strands cannot be broken off, and the total stress of the rest steel strands is increased by 25%, and the steel strands stretch a little, so that a beam slab only generates small displacement, and a triangular wedge at the bottom of a slab beam end cannot be damaged. And then, the steel strands at the corresponding positions of other plate beams are respectively and symmetrically cut off, and when all the plate beams are cut off, the tension of the part of steel strands is released, and the part of steel strands is released to be announced to end. And then circularly operating according to the method, gradually cutting off the rest steel strands, and gradually releasing the steel strands until all the steel strands are cut off and releasing the steel strands is finished.
In a preset beam manufacturing area, at least a plurality of mutually parallel precast beams can be simultaneously started to be constructed, and the first step of precast beam construction by using a pretensioning method is to place steel strands, wherein the lengths of the placed steel strands are at least approximate before being tensioned. Each precast beam for precast beam construction by using the pretensioning method needs to be repeatedly placed and cut off the steel strand with the designed length, the work is relatively complicated, and the replacement of manual placement can be completely realized by using mechanical equipment, so that the working efficiency is improved, the labor intensity of field personnel is reduced, and the precast beam has certain market value and popularization and application value.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a steel strand laying device for a pretensioned beam, which can repeatedly put steel strands with preset lengths and manufacture a prefabricated beam by using pretensioning, and is used for overcoming the defects in the prior art.
The utility model adopts the technical scheme that: the utility model provides a steel strand wires laying device of pretensioned beam, which comprises a supporting rack, be provided with the steel strand wires threading machine on the support frame, steel strand wires threading machine one side is provided with first steel strand wires guider, first steel strand wires guider be provided with two guide rails that are parallel to each other in one side of keeping away from the steel strand wires threading machine, the guide rail is provided with first guide bar on being close to the one end of steel strand wires threading machine, be provided with first slide on the first guide bar, be provided with second steel strand wires guider on the first slide, be provided with the tractor on the tractor, be provided with the second guide bar that parallels with first guide bar, be provided with the second slide on the second slide, be provided with singly Kong Mao on the second slide, be provided with tool clamping piece group in singly Kong Mao, first steel strand wires guider with second steel strand wires guider all include first fixed plate, with first fixed plate parallel arrangement's second fixed plate, first fixed plate be close to first gyro wheel that second fixed plate one side set up, first gyro wheel that runs through on the second fixed plate and first gyro wheel that first is close to first one end that sets up.
Preferably, the first guide rod is provided with a first scale layer, the second guide rod is provided with a second scale layer, and the first scale layer and the second scale layer extend along one end of the second guide rod towards the other end of the second guide rod.
Preferably, the first slide tube and the second slide tube are respectively provided with a fixing bolt in a penetrating way.
Preferably, the second steel strand guiding device is provided with a steel strand clamping device near one end of the tractor, the steel strand clamping device comprises a first clamping plate, a second screw and a second clamping plate, wherein the first clamping plate is arranged on the first fixing plate, the second screw is arranged on the second fixing plate, the second clamping plate is arranged on one end of the second screw, the second clamping plate is arranged on the other end of the second screw, and the clamping grooves are respectively arranged on the second clamping plate and the first clamping plate.
Preferably, the first lead screws on two sides of each second fixing plate and the second lead screws on two sides of each second fixing plate are respectively provided with a fastening nut.
Preferably, the first roller of the second steel strand guiding device is in transmission connection with a rotary encoder.
Preferably, the single-hole anchor is located between the second steel strand guiding device and the second sliding tube, a connecting plate is arranged on the second sliding tube, a connecting sleeve is arranged on the connecting plate, connecting pipes are arranged on the connecting plate and the connecting sleeve, a pressure bearing is arranged between the connecting pipe and the connecting sleeve, the single-hole anchor is installed on one side, close to the second steel strand guiding device, of the connecting pipe, a sleeve pressing pipe is arranged in the connecting pipe, the sleeve pressing pipe is in threaded connection with the connecting pipe, and a spring is arranged between the sleeve pressing pipe and the tool clamping piece group.
The utility model has the beneficial effects that: firstly, the utility model realizes the repeated placement of the steel strand with the preset length, and by using the product, the repeated labor of on-site staff is greatly reduced, the working intensity of the corresponding staff is reduced, and the utility model is worth popularizing.
Secondly, the diameter of the first roller is gradually reduced and then gradually increased along the direction from one end of the first roller to the other end of the first roller; the structure of the second roller corresponds to that of the first roller; the second roller and the first roller are convenient to clamp the placed steel strand, and the placed steel strand is convenient to convey.
Finally, a second clamping plate is arranged at one end, close to the first clamping plate, of the second screw rod, and clamping grooves are respectively arranged on the second clamping plate and the first clamping plate; the section of the inner cavity of the clamping groove adopts an arch structure, and the placed steel stranded wires are clamped by the clamping groove on the second clamping plate and the clamping groove on the first clamping plate.
The utility model has the advantages of simple structure, convenient operation, ingenious design, great improvement of working efficiency, good social and economic benefits and easy popularization and use.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged partial schematic view of detail a of fig. 1.
Fig. 3 is an enlarged partial schematic view of detail B of fig. 1.
Fig. 4 is an enlarged partial schematic view of detail C of fig. 1.
Fig. 5 is a schematic structural view of a first roller according to the present utility model.
Detailed Description
As shown in fig. 1 to 5, a steel strand laying device of a pretensioned beam comprises a support frame 1, wherein a steel strand threading machine 2 is arranged on the support frame 1, a first steel strand guiding device is arranged on one side of the steel strand threading machine 2, two mutually parallel guide rails 3 are arranged on one side of the first steel strand guiding device far away from the steel strand threading machine 2, a first guide rod 4 is arranged at one end, close to the steel strand threading machine 2, of the guide rails 3, a first slide tube 5 is arranged on the first guide rod 4, a second steel strand guiding device is arranged on the first slide tube 5, a tractor 6 is arranged on the guide rails 3, the tractor 6 comprises a plurality of wheel groups, each wheel group comprises two wheels, two wheels in each wheel group are correspondingly arranged on the guide rails 3 one by one, the top structure of the guide rails 3 is matched with the structure of the wheels, and the section of each wheel adopts an I shape; the tractor 6 is provided with a second guide rod 7 parallel to the first guide rod 4, the second guide rod 7 is provided with a second slide tube 8, the second slide tube 8 is provided with a single Kong Mao, and a tool clamping piece group is arranged in the single Kong Mao and comprises at least two tool clamping pieces 10; the first steel strand guiding device and the second steel strand guiding device comprise a first fixing plate 11, a second fixing plate 12 which is parallel to the first fixing plate 11, a first roller 13 which is arranged on one side of the first fixing plate 11 close to the second fixing plate 12, a first lead screw 14 which is arranged on the second fixing plate 12 in a penetrating way, and a second roller 15 which is arranged on one end of the first lead screw 14 close to the first roller 13. The support frame 1 and the first slide tube 5 are respectively provided with a second fixing plate 12 and a first fixing plate 11 correspondingly, and the second fixing plate 12 and the first fixing plate 11 are preferably parallel. The diameter of the first roller 13 gradually decreases and then gradually increases along the direction from one end of the first roller 13 to the other end of the first roller 13; the structure of the second roller 15 corresponds to the structure of the first roller 13.
The first guide rod 4 is provided with a first scale layer 16, the second guide rod 7 is provided with a second scale layer 17, and the first scale layer 16 and the second scale layer 17 extend along one end of the second guide rod 7 towards the other end of the second guide rod 7. The placement direction of the placed steel strand is determined by the relative position of the first slide tube 5 on the first scale layer 16 and the relative position of the second slide tube 8 on the second scale layer 17. Further, the first slide tube 5 and the second slide tube 8 are respectively provided with a fixing bolt 18 in a penetrating manner. The first slide 5 is screwed with the corresponding fixing bolt 18, and the second slide 8 is screwed with the corresponding fixing bolt 18, so that the relative position of the first slide 5 or the second slide 8 is fixed by the corresponding fixing bolt 18.
The steel strand clamping device is arranged at one end of the second steel strand guiding device, which is close to the tractor 6, and comprises a first clamping plate 19, a second lead screw 20, a second clamping plate 21 and clamping grooves 22, wherein the first clamping plate 19 is arranged on the first fixing plate 11, the second lead screw 20 is arranged on the second fixing plate 12, the second clamping plate 21 is arranged at one end of the second lead screw 20, which is close to the first clamping plate 19, and the clamping grooves 22 are respectively arranged on the second clamping plate 21 and the first clamping plate 19; the cross section of the inner cavity of the clamping groove 22 adopts an arch structure. Further, the first lead screw 14 on both sides of each of the second fixing plates 12 and the second lead screw 20 on both sides of each of the second fixing plates 12 are respectively provided with a fastening nut 23. The relative position of the first screw 14 or the second screw 20 is thereby easily fixed by tightening the corresponding fastening nut 23. Still further, a rotary encoder 24 is drivingly connected to the first roller 13 of the second strand guiding device. After the steel strand is clamped by the first roller 13 of the second steel strand guiding device and the second roller 15 of the second steel strand guiding device, the number of turns of the first roller 13 of the second steel strand guiding device is combined with the inherent radius of the first roller 13 of the second steel strand guiding device, so that the length of the placed steel strand passing through the first roller 13 of the second steel strand guiding device can be fed back.
Because the steel strand is mechanically stranded on the winch by utilizing a plurality of steel wires made of stainless steel or carbon steel in a specific direction, angle and strength; while the tension of each steel wire needs to be kept consistent during the twisting process, the twisting speed is gradually increased until the required twisting length and strength are reached. According to the product, in the gradual placement process of placed steel strands, the tool clamping piece group in the single Kong Mao clamps the free ends of the placed steel strands, as the characteristics of the steel strands are increased along with the placed length of the placed steel strands, the placed steel strands can rotate correspondingly when being clamped by the tool clamping piece group in the single Kong Mao in the placement process of being clamped by the second steel strand guiding device, in order to meet the working condition, the single-hole anchor 9 is located between the second steel strand guiding device and the second sliding tube 8, a connecting plate 25 is arranged on the second sliding tube 8, a connecting sleeve 26 is arranged on the connecting plate 25, a connecting tube 27 is arranged on the connecting plate 25 and the connecting sleeve 26, a pressure bearing 28 is arranged between the connecting tube 27 and the connecting tube 26, a pressure sleeve 29 is arranged in the connecting tube 27 and is arranged on one side, which is close to the second steel strand guiding device, of the single Kong Mao 9 is arranged on the connecting tube 27, the pressure sleeve 29 is in threaded connection with the connecting tube 27, and a spring 30 is arranged between the pressure sleeve 29 and the connecting tube 29 and the second steel strand guiding device. A first connecting rod 31 is respectively arranged between the first fixing plate 11 and the first clamping plate 19 and between the connecting plate 25 and the second slide tube 8, a second connecting rod 32 is arranged between the first fixing plate 11 and the first roller 13, and roller brackets 33 are respectively arranged between the first lead screw 14 and the second roller 15 and between the second connecting rod 32 and the first roller 13.
The application method of the product is as follows: as shown in fig. 1 to 5, S1, adjusting the position of the first slide tube 5 to a first preset position according to the position of the first slide tube 5 on the first guide rod 4 fed back by the first scale layer 16; the second slide tube 8 is adjusted to a second preset position on the second guide rod 7 through the second scale layer 17 according to the position of the first slide tube 5.
S2, a worker passes the steel strand through the steel strand threading machine 2, the first steel strand guiding device, the second steel strand guiding device and the steel strand clamping device, the free end of the steel strand is mounted on the single-hole anchor 9 to screw the sleeve 29, the sleeve 29 is pressed to enable the spring 30 to be compressed, and therefore the tool clamping piece group clamps the free end of the steel strand; and then adjusting the position of the first screw 14 of the first steel strand guiding device and the position of the first screw 14 of the second steel strand guiding device until the first roller 13 and the second roller 15 in the first steel strand guiding device clamp the steel strand and the first roller 13 and the second roller 15 in the second steel strand guiding device clamp the steel strand.
S3, driving the tractor 6 to move from a first preset position to a second preset position along the direction of the guide rail 3, at this time, because the first roller 13 and the second roller 15 in the second steel strand guiding device are in a state of clamping steel strands, adjusting the moving speed of the tractor 6 according to the speed of conveying the steel strands by the steel strand threading machine 2 until the speed of conveying the steel strands by the steel strand threading machine 2 is not greater than the moving speed of the tractor 6, finally calculating the length of the steel strands between the second steel strand guiding device and the single-hole anchor 9 to a preset length by combining the data fed back by the rotary encoder 24, and then closing the steel strand threading machine 2 and stopping the tractor 6, wherein the tractor 6 is positioned at the second preset position.
S4, adjusting the relative position of the second screw rod 20 on the second fixing plate 12 until the second clamping plate 21 and the first clamping plate 19 clamp the steel strand, and cutting off the steel strand between the second steel strand guiding device and the steel strand clamping device; resetting the second screw rod 20 to the second clamping plate 21 and the first clamping plate 19 to loosen the steel strand; finally, the relative position of the sleeve pressing 29 in the connecting pipe 27 is adjusted again until the spring 30 is reset, at this time, the tool clamping piece group loosens the steel strand, thereby completing one-time placement of the steel strand, and resetting the tractor 6 to the first preset position.
S5, repeatedly and sequentially operating the steps S1 to S4 until all the required steel strands are placed.
Through this embodiment, realized placing the steel strand wires of preset length repeatedly, utilized this product greatly reduced the repetitive work of on-the-spot staff, reduced corresponding personnel's working strength, be worth promoting.
The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present utility model.
Claims (7)
1. The utility model provides a steel strand wires laying device of pretensioned beam which characterized in that: including support frame (1), be provided with steel strand wires threading machine (2) on support frame (1), steel strand wires threading machine (2) one side is provided with first steel strand wires guider, first steel strand wires guider be provided with two guide rails (3) that are parallel to each other in one side of keeping away from steel strand wires threading machine (2), be provided with first guide bar (4) on the one end that guide rail (3) is close to steel strand wires threading machine (2), be provided with first slide pipe (5) on first guide bar (4), be provided with second steel strand wires guider on first slide pipe (5), be provided with tractor (6) on guide rail (3), be provided with second guide bar (7) that are parallel to first guide bar (4) on tractor (6), be provided with second slide pipe (8) on second guide bar (7), be provided with single hole anchor (9) on second slide pipe (8), be provided with the instrument clamping piece group in single Kong Mao (9), first steel strand wires guider with second steel strand wires guider all include first fixed plate (11), second stranded conductor (12) and first fixed plate (12) are close to first fixed plate (12) fixed plate (13) one side of being provided with first fixed plate A first lead screw (14) penetrating through the second fixing plate (12) and a second roller (15) arranged at one end of the first lead screw (14) close to the first roller (13).
2. The steel strand laying apparatus of a pretensioned beam according to claim 1, wherein: the first guide rod (4) is provided with a first scale layer (16), the second guide rod (7) is provided with a second scale layer (17), and the first scale layer (16) and the second scale layer (17) extend along one end of the second guide rod (7) towards the other end of the second guide rod (7).
3. The steel strand laying apparatus of a pretensioned beam according to claim 1, wherein: the first slide tube (5) and the second slide tube (8) are respectively provided with a fixing bolt (18) in a penetrating way.
4. The steel strand laying apparatus of a pretensioned beam according to claim 1, wherein: the second steel strand guiding device is provided with a steel strand clamping device on one end close to the tractor (6), the steel strand clamping device comprises a first fixing plate (11), a first clamping plate (19) arranged on the second fixing plate (12), a second lead screw (20) arranged on the second fixing plate (12), a second clamping plate (21) arranged on one end, close to the first clamping plate (19), of the second lead screw (20) and clamping grooves (22) respectively arranged on the second clamping plate (21) and the first clamping plate (19).
5. The steel strand laying apparatus of a pretensioned beam according to claim 4, wherein: the first lead screws (14) on two sides of each second fixing plate (12) and the second lead screws (20) on two sides of each second fixing plate (12) are respectively provided with a fastening nut (23).
6. The steel strand laying apparatus of a pretensioned beam according to claim 1, wherein: the first roller (13) of the second steel strand guiding device is connected with a rotary encoder (24) in a transmission way.
7. The steel strand laying apparatus of a pretensioned beam according to claim 1, wherein: the single-hole anchor (9) is located between the second steel strand guiding device and the second sliding tube (8), a connecting plate (25) is arranged on the second sliding tube (8), connecting sleeves (26) are arranged on the connecting plate (25), connecting pipes (27) are arranged on the connecting plate (25) and the connecting sleeves (26), pressure-bearing bearings (28) are arranged between the connecting pipes (27) and the connecting sleeves (26), the single-hole anchor (9) is installed on one side, close to the second steel strand guiding device, of the connecting pipes (27), a sleeve pressing tube (29) is arranged in the connecting pipes (27), the sleeve pressing tube (29) is in threaded connection with the connecting pipes (27), and springs (30) are arranged between the sleeve pressing tube (29) and the tool clamping piece groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323190076.9U CN221168742U (en) | 2023-11-27 | 2023-11-27 | Steel strand laying device of pretensioned beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323190076.9U CN221168742U (en) | 2023-11-27 | 2023-11-27 | Steel strand laying device of pretensioned beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221168742U true CN221168742U (en) | 2024-06-18 |
Family
ID=91438235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323190076.9U Active CN221168742U (en) | 2023-11-27 | 2023-11-27 | Steel strand laying device of pretensioned beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221168742U (en) |
-
2023
- 2023-11-27 CN CN202323190076.9U patent/CN221168742U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8904721B2 (en) | Anchoring, splicing and tensioning elongated reinforcement members | |
| CN106522574A (en) | Decomposition-type prestressed carbon fiber tensioning device and construction method thereof | |
| CN207524882U (en) | Inner blocking type stretch-draw jack | |
| CN221168742U (en) | Steel strand laying device of pretensioned beam | |
| US3942238A (en) | Method for reinforcing structures | |
| CN113459274A (en) | Manufacturing method of fiber woven mesh reinforced concrete composite board | |
| CN111663447A (en) | Prestressed bending and anchoring device for pre-tensioning precast beam plate and construction method | |
| CN104372956A (en) | Prestressed tension device and method for fiber sheet | |
| CN101265750A (en) | Backstay cable lever stretching device | |
| CN211647381U (en) | Steel wire rope fastening device for building construction | |
| CN106012834B (en) | A kind of spatial warping curve abnormal shape antisymmetry steel king-tower inner support and tensioning system | |
| CN112376916A (en) | Prestressed steel cable tensioning and tightening device and construction method | |
| CN110524675B (en) | Pre-tensioning prefabricated I-beam and construction method thereof | |
| KR102245187B1 (en) | Steel wire pre-tensioning apparatus for manufacturing prestressed concrete products having steel wire collecting transporting part | |
| CN215918756U (en) | V-shaped round steel jumper wire processing tool | |
| CN206458118U (en) | A kind of pre-stress fibre sheet combination assembled tensioning equipment | |
| CN115538697A (en) | Large-span slow-bonding prestressed reinforced concrete structural beam | |
| CN111779285A (en) | Pre-tensioning method prestressed tendon quick-pulling-releasing cutting-free construction method and device | |
| CN101608426A (en) | The preforming traction mechanism of unit strand imitating main cable linearity of suspension bridge | |
| CN113927728A (en) | Novel prestressed concrete mixed reinforcement pipe pile manufacturing device and method | |
| CN202611254U (en) | Prestressed rib threading device | |
| CN109339457A (en) | It is a kind of to be displaced from constraint formula pre-stress FRP sheet material tensioning equipment and its implementation method | |
| CN103147412A (en) | Carbon-fiber-reinforcement external pre-stressing tension anchor device and anchoring method | |
| CN106436587A (en) | Chain link type automatic synchronous tensioning system and method for prestressed wire ropes | |
| CN1737312A (en) | Multi-roof synchronous stretching construction method for prestressed beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |