CN115351884B - Synchronous positioning device and method for inner and outer templates of U-shaped aqueduct - Google Patents
Synchronous positioning device and method for inner and outer templates of U-shaped aqueduct Download PDFInfo
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- CN115351884B CN115351884B CN202210950354.7A CN202210950354A CN115351884B CN 115351884 B CN115351884 B CN 115351884B CN 202210950354 A CN202210950354 A CN 202210950354A CN 115351884 B CN115351884 B CN 115351884B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 15
- 230000007306 turnover Effects 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 44
- 238000007789 sealing Methods 0.000 claims description 38
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005266 casting Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
- B28B7/168—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes for holders or similar hollow articles, e.g. vaults, sewer pits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/08—Moulds provided with means for tilting or inverting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a synchronous positioning device and method for inner and outer templates of a U-shaped aqueduct, wherein the device comprises a portal frame, a bottom die, an inner die and an outer die, wherein the inner die is of a block structure in which adjacent modules are mutually hinged or in closed connection; the device also comprises an opening and closing mechanism for controlling the outer mold and the inner mold to transversely move and the inner mold to turn over each block; the portal frame is provided with travelling wheels which are convenient to move back and forth; the bottom die is positioned in the middle of the bottom of the portal and is used for connecting outer dies symmetrically arranged on two sides; the inner die is arranged on the inner side of the outer die, and is combined with the outer die and the bottom die to form a U-shaped aqueduct pouring cavity; the inner die and the outer die are respectively connected with the upper cross beam in a sliding manner and can transversely slide along the upper cross beam. The method is carried out by adopting the synchronous positioning device for the inner and outer templates of the U-shaped aqueduct. The template system can be transported across piers in a sectional way, so that the inner and outer dies are positioned simultaneously, the structure is simple, the operation is convenient, the construction cost is greatly reduced, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic aqueduct templates, in particular to a device and a method for synchronously positioning inner and outer templates of a U-shaped aqueduct.
Background
The aqueduct is an overhead water delivery building for delivering channel water flow to cross channels, roads, mountains, and the like, and is one of the most widely applied cross buildings in the hydraulic building of the irrigation area. The U-shaped aqueduct structure is usually a non-closed section, the structure line type is complex, the groove wall is thinner, the dead weight stress is concentrated at the groove bottom in the construction stage, the root of the midspan section is obviously bent, and the risk of cracking of the root of the section exists when the drop mould is implemented according to the conventional beam body structure. The existing construction method is to cast the whole aqueduct by stages by adopting a wooden template. The technology ensures that the whole aqueduct has stage pouring joints in the horizontal direction, and the concrete joint surfaces of the pouring joints in different stages are frequently permeated due to construction defects.
In order to solve the problems, for example, chinese patent publication No. CN213086719U discloses a U-shaped aqueduct truss type full steel template, which comprises a steel bottom plate, a supporting frame, an outer side die, a bottom die and an inner die; a U-shaped aqueduct pouring cavity is formed between the inner die and the outer die, a reinforcement cage is arranged between the inner die and the outer die, and a plurality of pouring hole construction holes are formed in the inner die. The template provided by the patent can enable the aqueduct reinforced concrete to be formed and constructed at one time. However, the U-shaped aqueduct template is relatively fixed in structure, the template disassembling and assembling process is complex, the template system is difficult to move across piers, the development of the next procedure is affected, and the U-shaped aqueduct template has the defects of relatively high material consumption and unsatisfactory construction efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a construction device and a construction method for a U-shaped aqueduct structure, which enable a template system to be transported across piers once to be in place, realize simultaneous positioning of an inner mold and an outer mold, reduce material consumption and improve construction efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a synchronous device of taking one's place of U type aqueduct inner and outer template, comprises a plurality of section unit, and every basic section unit all includes: the device comprises a portal frame, a bottom die, an inner die and an outer die, wherein the inner die is of a block structure in which adjacent modules are mutually hinged or in closed connection; the device also comprises an opening and closing mechanism for controlling the outer mold and the inner mold to transversely move and the inner mold to turn over each block; the portal comprises an upper cross beam for suspending the outer die and the inner die and a stand column for supporting the upper cross beam, and the bottom of the stand column is provided with a travelling wheel which is convenient for the portal to move back and forth; the bottom die is positioned in the middle of the bottom of the portal and is used for connecting outer dies symmetrically arranged on two sides; the inner die is arranged on the inner side of the outer die, and is combined with the outer die and the bottom die to form a U-shaped aqueduct pouring cavity; the inner die and the outer die are respectively connected with the upper cross beam in a sliding manner and can transversely slide along the upper cross beam.
As a further improvement of the above technical scheme:
the upper end of the upper beam is provided with a pulley which is fixedly connected with the outer die through a suspender and can transversely move along the upper beam; the lower end of the upper cross beam is provided with a lower flange plate for connecting an inner die; the bottom die comprises two mutually symmetrical bottom die supports and also comprises a bottom die pull rod which transversely connects the two bottom die supports together.
The internal mold comprises an upper internal mold, a middle internal mold, a lower internal mold, a bottom mold and a supporting frame, wherein the upper internal mold, the middle internal mold and the lower internal mold are symmetrically arranged in two groups, the bottom mold is positioned at the middle position of the bottom of the internal mold, and the supporting frame is used for connecting the internal mold and the door frame; wherein one end of the upper inner die is hinged to the top of the supporting frame, and the other end of the upper inner die is in closed connection with the middle inner die; the lower internal mold is fixedly connected to the bottom of the support frame, and the adjacent modules of the middle internal mold, the lower internal mold and the bottom sealing mold are mutually hinged; and stiffening plates are arranged on the inner sides of all the modules of the inner die.
The support frame consists of two symmetrically arranged F-shaped frames, wherein each F-shaped frame comprises an upper arm extending beam, a lower arm extending beam and a support frame upright post; the upper arm extending beam is attached to the bottom of the upper cross beam of the portal frame; the upper surface of the upper arm-extending beam is fixedly connected with a hook wheel which enables the support frame to be connected with the upper cross beam in a sliding way and is buckled on the lower flange plate of the upper cross beam; the outer part of the hook wheel is provided with a stiffening plate, and the inner part of the hook wheel is provided with a roller which is convenient for the hook wheel to transversely move along the upper cross beam; the upper inner die is hinged with the upper arm-stretching beam, and the middle inner die is fixedly connected with the bottom of the lower arm-stretching beam of the support frame and the upright post of the support frame; and a plurality of construction holes for installing a cross brace screw rod before concrete pouring are also formed in the inner die and the support frame.
The opening and closing mechanism comprises a first traversing device for controlling the outer die to transversely move, a second traversing device and a third traversing device for jointly controlling the support frame to transversely move, and a lower inner die lifting device for enabling the lower inner die to be connected with the support frame and controlling the lower inner die to lift.
The opening and closing mechanism further comprises an opening and closing connecting rod for controlling the opening and closing of each module of the inner die, wherein the opening and closing connecting rod comprises an L-shaped connecting rod formed by hinging two groups of first supporting rods with second supporting rods, and the opening and closing mechanism further comprises an oil cylinder for driving the L-shaped connecting rod mechanism to draw the template to open and close and is positioned at the inner side of the L-shaped connecting rod; the oil cylinder comprises a telescopic end provided with a telescopic rod and a cylindrical end for accommodating the telescopic rod, the telescopic end of the oil cylinder is hinged with the two first supporting rods at the same time, and the cylindrical end of the oil cylinder and the second supporting rod are positioned on the same side.
The first traversing device comprises a traversing oil cylinder which is fixed at the upper end of the upper cross beam and provides transverse driving force for the pulley, the cylindrical end of the oil cylinder is fixedly connected with the upper cross beam, and the telescopic end is fixedly connected with the pulley;
the second traversing device comprises a traversing oil cylinder which is fixed at the bottom of the upper cross beam and provides transverse traction for the support frame; the cylindrical end of the oil cylinder is fixedly connected with the upper cross beam, and the telescopic end of the oil cylinder is fixedly connected with an upper transverse support leg arranged in the middle of an upper extending arm of the support frame;
the third traversing device comprises an X-shaped mechanism consisting of 4 inclined stay bars and an oil cylinder, wherein one end of each inclined stay bar is hinged with a stay column of the F-shaped frame, and the other end of each inclined stay bar is hinged with a telescopic end or a cylindrical end of the oil cylinder;
the lower internal mold lifting device comprises a lifting oil cylinder fixedly connected to the stand column of the support frame and the lower end of the lower cantilever beam, the cylindrical end of the oil cylinder is fixedly connected with the support frame, and the telescopic end of the oil cylinder is fixedly connected with the stiffening plate of the lower internal mold.
The upper internal mold is connected with a first opening and closing connecting rod for controlling the opening and closing of the upper internal mold; a first supporting rod of the first opening and closing connecting rod is hinged with a stiffening plate of the upper inner die, and a second supporting rod is hinged with a cylindrical end of the oil cylinder and is hinged with an upper transverse supporting leg;
the middle inner die is connected with a second opening and closing connecting rod for controlling the opening and closing of the middle inner die, a first supporting rod of the second opening and closing connecting rod is hinged with a stiffening plate of the middle inner die, and a second supporting rod is hinged with a cylindrical end of the oil cylinder and the stiffening plate of the lower inner die;
the lower internal mold is connected with a third opening and closing connecting rod for controlling the opening and closing of the lower internal mold, a first supporting rod of the third opening and closing connecting rod is hinged with a stiffening plate of the bottom sealing mold, and a second supporting rod is hinged with a cylindrical end of the oil cylinder and the stiffening plate of the lower internal mold.
The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct is carried out by applying the device for synchronously positioning the inner and outer templates of the U-shaped aqueduct, and specifically comprises the following steps:
s1: setting up an nth cross-support platform;
s2: setting up an n+1th cross support platform, and synchronously installing a bottom die of the n th cross and outer layer reinforcing steel bars within the range of installing the bottom die;
s3: setting up an n+2-th cross support platform, synchronously mounting an n+1-th cross bottom die, and mounting outer layer reinforcing steel bars within the range of the bottom die; the portal frame of the basic section unit is transported to the nth cross-support platform with the inner mold and the outer mold by sections until the whole cross-support basic unit is transported to the position, and outer layer reinforcing steel bars in the range of the inner mold and the outer mold are installed;
s4, pouring nth span concrete, after the strength of the concrete is met, demoulding the inner and outer moulds, carrying the nth span inner mould and the outer mould by a door frame, and carrying out one-time positioning to n+1 spans, and installing reinforcing steel bars;
s5: transferring the nth span bottom die to an n+2 span bracket platform through hoisting, installing, and pouring concrete of the nth+1 span;
s6: and (5) continuing the circulation process according to the steps S1 to S5 until the process is finished.
As a further improvement of the above technical scheme:
and a rail which is matched with the portal travelling wheels and is convenient for the portal to move is paved on the bracket platform erected in the steps S1-S3.
In step S3, during the process of installing the inner mold and the outer mold, the specific operation steps of the device are as follows:
s31: the second traversing device and the third traversing device act together to transversely open the support frame; vertically moving the lower internal mold and the middle internal mold into position through a lower internal mold lifting device, and installing an inner layer steel bar within the height range of the bottom mold;
s32: the outer die is pulled to move inwards and be in position by the outer die traversing oil cylinder;
s33: the middle internal mold is turned over to be in place through a second opening and closing connecting rod, and inner and outer layer steel bars within the height range of the middle internal mold are installed;
s34: the upper inner die is turned over to be in place through a first opening and closing connecting rod, and inner and outer layer steel bars within the height range of the upper inner die are installed;
s35: and installing and locking a cross brace screw rod between the support frame and the inner die.
In step S4, when concrete is poured, the bottom sealing die is firstly kept in an opened state, concrete is poured from the opening of the bottom sealing die, when the pouring height reaches the lowest point position of the bottom sealing die, the bottom sealing die is turned over to be in place through the bottom sealing die opening and closing mechanism, and is locked with the adjacent lower internal die through the bolt, and then concrete is poured from two sides of the structure until the pouring is completed.
In the step S4, the inner mold and the outer mold are demolded, and the device comprises the following specific operation steps:
s41: dismantling a cross bracing screw rod between the support frames and the inner mold;
s42: the upper internal mold is turned over and retracted through the first opening and closing connecting rod, and the upper internal mold is separated from the concrete;
s43: the middle internal mold is turned over and retracted through the second opening and closing connecting rod, and the middle internal mold is separated from the concrete;
s44: the bottom sealing mould is turned over and retracted through a third opening and closing connecting rod, and the bottom sealing mould is separated from the concrete;
s45: the lower internal mold and the middle internal mold bottom sealing mold are vertically lifted by a lower internal mold lifting device, and the lower internal mold is separated from concrete;
s46: the second traversing device and the third traversing device transversely shrink the support frame, so that the gap between the inner mould and the concrete is further enlarged;
s47: and the outer mold is translated outwards through the first traversing device, and the outer mold is separated from the concrete.
Compared with the prior art, the invention has the advantages that:
according to the synchronous positioning device for the inner and outer templates of the U-shaped aqueduct, disclosed by the invention, aiming at the complex diversity of structural changes of the U-shaped aqueduct body, the template system can be transported across piers in a sectional manner through displacement or retraction of different parts of the inner and outer templates, so that the inner and outer templates are positioned simultaneously.
Drawings
Fig. 1 is a schematic front view of a casting structure of an embodiment of the device of the present invention.
Fig. 2 is a schematic front view of the running state structure of an embodiment of the device of the present invention.
Fig. 3 is a schematic perspective view of the structure of the bracket of the present invention.
Fig. 4 is a schematic perspective view of the internal mold structure of the present invention.
FIG. 5 is a schematic perspective view of the connection relationship structure between the upper inner mold and the F-shaped frame.
Fig. 6 is a schematic exploded view of the open-close link structure.
Fig. 7 is a schematic perspective view of the connection relation structure of the lower inner mold and the bracket.
Fig. 8 is a schematic perspective view of the connection relationship between the upper arm beam and the upper cross beam of the bracket.
Fig. 9 is a schematic front view of a casting structure of a device of the method embodiment.
Fig. 10 is a schematic perspective view of a part of the structure of the portal unit of the present embodiment.
The reference numerals in the drawings denote:
1. a door frame; 11. an upper cross beam; 12. a column; 13. a side sill; 14. a pulley; 15. a lower flange plate; 16. a walking wheel; 17. a boom; 2. a bottom die; 21. a bottom die support; 22. a bottom die pull rod; 3. an inner mold; 31. an upper internal mold; 32. a middle internal mold; 33. a lower internal mold; 34. sealing the bottom die; 4. an outer mold; 41. a first traversing device; 42. a second traversing device; 43. a third traversing device; 5. a supporting frame; 51. f-shaped frames; 52. an upper arm beam; 53. a lower arm beam; 54. a strut upright; 55. hook wheel; 56. an upper traversing leg; 57. a bracing frame longitudinal beam; 58. a lower internal mold lifting device; 6. opening and closing the connecting rod; 61. a first opening and closing connecting rod; 62. a second opening and closing connecting rod; 63. a third opening and closing connecting rod; 64. a first stay; 65. a second stay bar; 7. an oil cylinder; 71. a telescoping end; 72. a cylindrical end; 8. a support platform; 9. and a cross-bracing screw rod.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
Fig. 1 to 9 show an embodiment of the synchronous positioning device of the inner and outer templates of the U-shaped aqueduct of the present invention, which is composed of several segment units, each basic segment unit comprising: the utility model provides a synchronous device of taking one's place of interior and exterior template of U type aqueduct, includes: the device comprises a portal 1, a bottom die 2, an inner die 3 and an outer die 4, wherein the inner die 3 is of a block structure in which adjacent modules are hinged or closed; the device also comprises an opening and closing mechanism for controlling the outer mold 4 and the inner mold 3 to transversely move and the inner mold 3 to turn over each block; the portal 1 comprises an upper cross beam 11 for suspending the outer die 4 and the inner die 3 and a stand column 12 for supporting the upper cross beam 11, wherein the bottom of the stand column 12 is provided with a travelling wheel 16 for facilitating the front and back movement of the portal 1; the bottom die 2 is positioned in the middle of the bottom of the portal 1 and is used for connecting outer dies 4 symmetrically arranged on two sides; the inner die 3 is arranged on the inner side of the outer die 4 and is combined with the outer die 4 and the bottom die 2 to form a U-shaped aqueduct pouring cavity; the inner die 3 and the outer die 4 are respectively connected with the upper cross beam 11 in a sliding manner and can slide transversely along the upper cross beam 11.
Referring to fig. 1 and 2 specifically, the synchronous positioning device for the inner and outer templates of the U-shaped aqueduct of the present invention has two working modes, namely a pouring mode and a traveling mode. When the casting state is in, the outer mold 4 is in closed connection with the bottom mold 2 and is combined with the inner mold 3 to form a U-shaped aqueduct casting cavity; when the internal mold 3 and the external mold 4 are in a walking state, the internal mold 3 and the external mold 4 are suspended on the door frame 1 at the same time, the external mold 4 is separated from the bottom mold 2 and transversely moved to the two ends of the door frame 1, the internal mold 3 is decomposed into a plurality of modules, and the internal mold is contracted inwards, so that the door frame 1 can conveniently drive the external mold 4 and the internal mold 3 to move downwards in a crossing way at the same time, and the aim of synchronously positioning the internal mold and the external mold is fulfilled.
In this embodiment, a pulley 14 which is fixedly connected with the outer mold 4 through a boom 17 and can transversely move along the upper beam 11 is arranged at the upper end of the upper beam 11; the lower end of the upper cross beam 11 is provided with a lower flange plate 15 for connecting the inner die 3; the bottom die 2 comprises two mutually symmetrical bottom die supports 21 and a bottom die pull rod 22 for transversely connecting the two bottom die supports 21 together.
In this embodiment, the inner mold 3 includes an upper inner mold 31, a middle inner mold 32, a lower inner mold 33 symmetrically provided with two groups, and a bottom mold 34 located at a middle position of the bottom of the inner mold 3, and further includes a bracket 5 for connecting the inner mold 3 and the gantry 1; one end of the upper inner die 31 is hinged to the top of the supporting frame 5, and the other end of the upper inner die is in closed connection with the middle inner die 32; the lower internal mold 33 is fixedly connected with the bracket 5; the adjacent modules of the middle inner die 32, the lower inner die 33 and the bottom sealing die 34 are hinged with each other; stiffening plates are arranged on the inner sides of the modules of the inner mold 3.
In this embodiment, the inner mold 3 is connected to the upper beam 11 through a bracket 5; the support frame 5 is composed of two symmetrically arranged F-shaped frames 51, wherein the F-shaped frames 51 comprise an upper arm extending beam 52, a lower arm extending beam 53 and a support frame upright post 54; the upper arm-extending beam 52 is attached to the bottom of the upper cross beam 11 of the portal 1; the upper surface of the upper arm-extending beam 52 is fixedly connected with a hook wheel 55 which enables the bracket 5 to be connected with the upper cross beam 11 in a sliding way and is buckled on the lower flange plate 15 of the upper cross beam 11; the outer part of the hook wheel 55 is provided with a stiffening plate, and the inner part of the hook wheel 55 is provided with a roller which is convenient for the hook wheel 55 to transversely move along the upper cross beam 11; the upper inner die 31 is hinged with an upper arm extending beam 52, and the lower inner die 33 is fixedly connected with a lower arm extending beam 53 and a support stand column 54 of the support 5; and a plurality of construction holes for further fixing the transverse strut screw rod 9 are further formed in the inner mold 3 and the support frame 5 before concrete pouring.
Referring to fig. 3 specifically, the F-shaped frame 51 is formed by fixedly connecting two sets of upper arm beams 52, lower arm beams 53, and strut columns 54 through two strut stringers 57, so as to simplify the structure of the F-shaped frame 51 and reduce the overall weight.
The dead weight of the inner mould 3 and the supporting frame 5 is transmitted to the upper cross beam 11 of the portal 1 through the hook wheel 55 at the top of the supporting frame 5; the buoyancy of the internal mold 32 is transmitted to the bottom of the upper cross beam 11 through the top of the supporting frame 5 in the concrete pouring process, and is balanced through the self weight of the formwork system.
Referring to fig. 9, when the device is in a casting state, a plurality of cross-bracing screw rods 9 are arranged between the inner mold and the support frame to strengthen the support of the support frame to the inner mold.
Referring to fig. 4 specifically, adjacent modules of the inner mold 3 are locked by pins in a closed state, and when the inner mold 3 needs to be telescopically displaced, the pins need to be detached. After the bracket 5 transversely moves to be in place, the bracket is further fixed by arranging a transverse supporting screw rod 9 before concrete pouring.
In this embodiment, the opening and closing mechanism includes a first traversing device 41 for controlling the outer mold 4 to move laterally, a second traversing device 42 and a third traversing device 43 for controlling the strut 5 to move laterally together; the opening and closing mechanism further comprises a lower inner die lifting device 58 which is used for connecting the lower inner die 33 with the supporting frame 5 and controlling the lower inner die 33 to lift.
In this embodiment, the opening and closing mechanism further includes an opening and closing connecting rod 6 for controlling opening and closing of each part of the inner mold 3, where the opening and closing connecting rod 6 includes two groups of L-shaped connecting rods formed by hinging a first stay rod 64 and a second stay rod 65, and further includes an oil cylinder 7 for driving the L-shaped connecting rod mechanism to draw the mold to open and close and located inside the L-shaped connecting rods; the oil cylinder 7 comprises a telescopic end 71 provided with a telescopic rod and a cylindrical end 72 for accommodating the telescopic rod, the telescopic end 71 of the oil cylinder 7 is hinged with the two first supporting rods 64 at the same time, and the cylindrical end 72 of the oil cylinder 7 and the second supporting rod 65 are positioned on the same side.
In this embodiment, the first traversing device 41 includes a traversing cylinder 7 that provides a transverse driving force for the pulley 14 and is fixed at the upper end of the upper beam 11, a cylindrical end 72 of the cylinder 7 is fixedly connected with the upper beam 11, and a telescopic end 71 is fixedly connected with the pulley 14;
the second traversing device 42 comprises a traversing cylinder 7 which is fixed at the bottom of the upper cross beam 11 and provides transverse traction for the bracket 5; the cylindrical end 72 of the oil cylinder 7 is fixedly connected with the upper cross beam 11, and the telescopic end 71 is fixedly connected with the upper transverse support leg 56 arranged in the middle of the upper arm of the support frame 5;
the third traversing device 43 comprises an X-shaped connecting rod consisting of 4 inclined supporting rods and an oil cylinder 7, one end of each inclined supporting rod is hinged with a supporting frame upright post 54 of the F-shaped frame 51, and the other end of each inclined supporting rod is hinged with a telescopic end 71 or a cylindrical end 72 of the oil cylinder 7;
the lower inner mold lifting device 58 comprises a lifting cylinder 7 fixedly connected to the lower ends of the support frame upright post 54 and the lower cantilever beam 53, a cylindrical end 72 of the cylinder 7 is fixedly connected with the support frame 5, and a telescopic end 71 is fixedly connected with a stiffening plate of the lower inner mold 33.
Referring to fig. 5 and 8, an upper cross leg 56 is disposed between the upper arms of the two brackets 5 and is positioned in the middle of the upper longitudinal beam of the fixed bracket 5.
Referring to fig. 3 specifically, two sets of X-shaped links of the third traversing device 43 are disposed between the two F-shaped frames 51 and hinged to the strut posts 54 of the two F-shaped frames 51.
Referring to fig. 7 specifically, the lifting cylinder 7 of the lower inner mold lifting device 58 not only plays a role of connecting the lower inner mold 33 with the supporting frame 5, but also controls the lifting of the lower inner mold 33, and since the lower inner mold 33 is hinged with the adjacent middle inner mold 32 and the bottom sealing mold 34, the lower inner mold lifting device 58 synchronously controls the lifting of the middle inner mold 32 and the bottom sealing mold 34.
In this embodiment, the upper inner mold 31 is connected with a first opening and closing connecting rod 61 for controlling the opening and closing of the upper inner mold; a first stay bar 64 of the first opening and closing connecting rod 61 is hinged with a stiffening plate of the upper inner die 31, and a second stay bar 65 is hinged with a cylindrical end 72 of the oil cylinder 7 and is hinged with the upper transverse moving supporting leg 56;
the middle inner die 32 is connected with a second opening and closing connecting rod 62 for controlling the opening and closing of the middle inner die 32, a first supporting rod 64 of the second opening and closing connecting rod 62 is hinged with a stiffening plate of the middle inner die 32, and a second supporting rod 65 is hinged with a cylindrical end 72 of the oil cylinder 7 and a stiffening plate of the lower inner die 33;
the bottom sealing die 34 is connected with a third opening and closing connecting rod 63 for controlling the opening and closing of the bottom sealing die 34, a first supporting rod 64 of the third opening and closing connecting rod 63 is hinged with a stiffening plate of the bottom sealing die 34, and a second supporting rod 65 is hinged with a cylindrical end 72 of the oil cylinder 7 and the stiffening plate of the lower inner die 33.
Under the action of the opening and closing connecting rods, the upper inner die 31, the middle inner die 32 and the bottom sealing die 34 can be opened and closed through overturning, wherein the first opening and closing connecting rod 61 and the second opening and closing connecting rod 62 are symmetrically provided with 2 groups, the third opening and closing connecting rod 63 is provided with one group, and when the bottom sealing die 34 needs to be overturned inwards, a pin shaft which is not provided with one end of the third opening and closing connecting rod 63 and connected with the lower inner die 3 can be dismounted. Under the combined action of all components of the opening and closing mechanism, the retraction or the positioning of different parts of the inner die 3 and the outer die 4 are realized.
Taking the process of changing the pouring state into the moving state as an example, the operation principle of each part of the opening and closing mechanism is as follows:
the telescopic end 71 of the cylinder 7 of the first traversing device 41 is pushed out from the cylindrical end 72 to push the outer die 4 to traverse outwards. The telescopic end 71 of the transverse moving cylinder 7 of the second transverse moving device 42 is pushed out of the cylindrical cavity, and meanwhile, the telescopic end 71 of the cylinder 7 of the third transverse moving device 43 is retracted into the cylindrical cavity, and the two F-shaped frames 51 synchronously move inwards and transversely under the combined action of the two transverse moving devices, so that each module of the internal mold 3 is driven to move inwards and transversely;
the oil cylinder 7 of the first opening and closing connecting rod 61 is retracted, so that the upper internal molds 31 on the two sides are inwards measured to turn over and shrink; the telescopic end 71 of the oil cylinder 7 of the second opening and closing mechanism is retracted, so that the middle internal molds 32 at the two sides are turned inwards; the lower bottom sealing die 34 is turned upwards by retracting the telescopic end 71 of the oil cylinder 7 of the third opening and closing connecting rod 63 without a locating pin hinged with the lower internal die 33 on one side of the third opening and closing connecting rod 63 arranged on the bottom sealing die 34.
The telescopic end 71 of the oil cylinder 7 of the lower internal mold lifting device 58 contracts, so that the lower internal mold 33 is lifted upwards, and simultaneously the middle internal mold 32 and the sealing bottom mold 34 are driven to be lifted, and the internal mold 3 completes contraction.
After the portal 1 drives the inner mold 3 and the outer mold 4 in a running state to transversely move and position, the device is converted back to a pouring state through the opposite operation of the opening and closing mechanism.
Referring to fig. 10, in this embodiment, two groups of the door frames 1 may be connected and combined into a door frame unit through a bottom longitudinal beam 13, the bottom longitudinal beam 13 is fixedly connected to the lower surfaces of the same side columns 12 of the two groups of door frames 1, and the travelling wheels 16 are fixedly connected to the bottoms of the bottom longitudinal beams 13; one portal unit is simultaneously connected with two sets of basic segment units. The stability of the portal 1 is enhanced by the arrangement of the side sill 13, so that a group of portal units can simultaneously move two groups of inner and outer mold plates, and the working efficiency is improved.
The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct is carried out by applying the device for synchronously positioning the inner and outer templates of the U-shaped aqueduct, and specifically comprises the following steps:
s1: setting up an nth cross-support platform 8;
s2: setting up an n+1th cross support platform 8, and synchronously installing a bottom die 2 of an n-th cross and installing outer layer steel bars within the range of the bottom die 2;
s3: setting up an n+2-th cross support platform 8, synchronously mounting an n+1-th cross bottom die 2, and mounting outer layer reinforcing steel bars within the range of the bottom die 2; the portal frame 1 of the basic section unit is transported to the nth cross support platform 8 with the inner mold 3 and the outer mold 4 in place by sections until the whole cross basic unit is transported to the place, and outer layer reinforcing steel bars within the range of the inner mold 3 and the outer mold 4 are installed;
s4, pouring nth span concrete, after the strength of the concrete is met, demoulding the inner die and the outer die 4, carrying the nth span inner die 3 and the outer die 4 by the portal 1, and once positioning to n+1 spans, and installing reinforcing steel bars;
s5: and transferring the nth span bottom die 2 to the n+2 span support platform 8 through hoisting and installing, and pouring concrete of the nth+1 span.
S6: and (5) continuing the circulation process according to the steps S1 to S5 until the process is finished.
In this embodiment, the support platform 8 set up in steps S1-S3 is laid with rails adapted to the travelling wheels 16 of the gantry 1, which facilitate movement of the gantry 1.
In step S3, during the installation process of the inner mold 3 and the outer mold 4, the specific operation steps of the device are as follows:
s31: the second traversing device 42 and the third traversing device 43 cooperate to transversely open the supporting frame 5; the lower internal mold 33 and the middle internal mold 32 are vertically moved into position by a lower internal mold lifting device 58, and an inner layer reinforcing steel bar within the height range of the bottom mold 2 is installed;
s32: the outer die 4 is pulled to move inwards and be in place by the transverse moving oil cylinder 7 of the outer die 4;
s33: the middle inner die 32 is turned over to be in place through a second opening and closing connecting rod 62, and inner and outer layer steel bars within the height range of the middle inner die 32 are installed;
s34: the upper inner die 31 is turned over to be in place through a first opening and closing connecting rod 61, and inner and outer layer steel bars within the height range of the upper inner die 31 are installed;
s35: and a cross bracing screw rod 9 between the supporting frame 5 and the inner die 3 is installed and locked.
In this embodiment, in step S4, when concrete is poured, the bottom sealing mold 34 is first kept in an open state, concrete is poured from the openings of the bottom sealing mold 34, when the pouring height reaches the lowest point position of the bottom sealing mold 34, the bottom sealing mold 34 is turned over to be in place by the third opening and closing connecting rod 63, and is locked with the adjacent lower internal mold 33 by the bolt, and then concrete is poured from the openings of the two sides of the U-shaped cavity until the pouring is completed.
The problems that the height of the groove body is high, the thickness is thin, and the casting quality is difficult to control are solved, the casting is carried out while the mould is assembled on the basis of the research and development of a tool by adopting a scheme that the internal mould 3 is in place and the construction is carried out synchronously with the concrete casting, and the concrete construction quality is ensured.
In this embodiment, in step S4, the demolding process of the inner mold 3 and the outer mold 4, the specific operation steps of the apparatus are as follows:
s41: dismantling a cross brace screw rod 9 between the support frame 5 and the inner mold 3;
s42: the upper inner mould 31 is turned over and retracted through the first opening and closing connecting rod 61, and the upper inner mould 31 is separated from the concrete;
s43: the middle internal mold 32 is turned over and retracted through the second opening and closing connecting rod 62, and the middle internal mold 32 is separated from the concrete;
s44: the bottom sealing mould 34 is turned over and retracted through a third opening and closing connecting rod 63, and the bottom sealing mould 34 is separated from the concrete;
s45: the lower internal mold 33 and the middle internal mold 32 are vertically lifted by the lower internal mold lifting device 58, and the lower internal mold 33 is separated from the concrete;
s46: the second traversing device 42 and the third traversing device 43 transversely shrink the support frame 5, so that the gap between the inner mould 3 and the concrete is further enlarged;
s47: the outer mould 4 is translated outwards by the first traversing means 41 and the outer mould 4 is released from the concrete.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (11)
1. The utility model provides a synchronous device of taking one's place of U type aqueduct inner and outer template, comprises a plurality of section unit, and every basic section unit all includes: portal (1), die block (2), centre form (3), external mold (4), its characterized in that: the internal mold (3) is of a block structure in which adjacent modules are hinged or closed; the device also comprises an opening and closing mechanism for controlling the outer mold (4) and the inner mold (3) to transversely move and the inner mold (3) to turn over each block; the portal frame (1) comprises an upper cross beam (11) for suspending the outer die (4) and the inner die (3) and a stand column (12) for supporting the upper cross beam (11), wherein the bottom of the stand column (12) is provided with a travelling wheel (16) which is convenient for the portal frame (1) to move forwards and backwards; the bottom die (2) is positioned in the middle of the bottom of the portal (1) and is used for connecting outer dies (4) symmetrically arranged on two sides; the inner die (3) is arranged at the inner side of the outer die (4), and is combined with the outer die (4) and the bottom die (2) to form a U-shaped aqueduct pouring cavity; the inner die (3) and the outer die (4) are respectively connected with the upper cross beam (11) in a sliding manner and can transversely slide along the upper cross beam (11), and a pulley (14) which is fixedly connected with the outer die (4) through a suspender (17) and can transversely move along the upper cross beam (11) is arranged at the upper end of the upper cross beam (11); the lower end of the upper cross beam (11) is provided with a lower flange plate (15) for connecting the inner die (3); the bottom die (2) comprises two mutually symmetrical bottom die supports (21), a bottom die pull rod (22) for transversely connecting the two bottom die supports (21) together, the inner die (3) comprises an upper inner die (31), a middle inner die (32), a lower inner die (33) and a sealing bottom die (34) positioned at the middle position of the bottom of the inner die (3) which are symmetrically arranged, and a supporting frame (5) for connecting the inner die (3) with the door frame (1); one end of the upper inner die (31) is hinged to the top of the supporting frame (5), and the other end of the upper inner die is in closed connection with the middle inner die (32); the lower internal mold (33) is fixedly connected with the supporting frame (5), and adjacent modules of the middle internal mold (32), the lower internal mold (33) and the bottom sealing mold (34) are mutually hinged; stiffening plates are arranged on the inner sides of the modules of the inner mold (3).
2. The synchronous positioning device for the inner and outer templates of the U-shaped aqueduct according to claim 1, wherein: the support frame (5) consists of two symmetrically arranged F-shaped frames (51), wherein the F-shaped frames (51) comprise an upper arm extending beam (52), a lower arm extending beam (53) and a support frame upright post (54); the upper arm extending beam (52) is attached to the bottom of the upper cross beam (11) of the door frame (1); the upper surface of the upper arm extending beam (52) is fixedly connected with a hook wheel (55) which enables the supporting frame (5) to be connected with the upper cross beam (11) in a sliding manner and is buckled on the lower flange plate (15) of the upper cross beam (11); the outer part of the hook wheel (55) is provided with a stiffening plate, and the inner part of the hook wheel (55) is provided with a roller which is convenient for the hook wheel (55) to transversely move along the upper cross beam (11); the upper inner die (31) is hinged with the upper arm extending beam (52), and the lower inner die (33) is fixedly connected with the lower arm extending beam (53) of the support frame (5) and the bottom of the support frame upright post (54); and a plurality of construction holes for installing a cross brace screw rod (9) before concrete pouring are also formed in the inner die (3) and the support frame (5).
3. The synchronous positioning device for the inner and outer templates of the U-shaped aqueduct according to claim 2, wherein: the opening and closing mechanism comprises a first traversing device (41) for controlling the outer die (4) to transversely move, a second traversing device (42) and a third traversing device (43) for jointly controlling the support frame (5) to transversely move, and a lower inner die lifting device (58) for enabling the lower inner die (33) to be connected with the support frame (5) and controlling the lower inner die (33) to lift.
4. A synchronous positioning device for inner and outer templates of a U-shaped aqueduct according to claim 3, wherein: the opening and closing mechanism further comprises opening and closing connecting rods (6) for controlling the opening and closing of each module of the inner die (3), wherein each opening and closing connecting rod (6) comprises an L-shaped connecting rod formed by hinging two groups of first supporting rods (64) and second supporting rods (65), and further comprises an oil cylinder (7) for driving the traction template of the L-shaped connecting rod mechanism to open and close and positioned at the inner side of the L-shaped connecting rod; the oil cylinder (7) comprises a telescopic end (71) provided with a telescopic rod and a cylindrical end (72) for accommodating the telescopic rod, the telescopic end (71) of the oil cylinder (7) is hinged with the two first supporting rods (64) at the same time, and the cylindrical end (72) of the oil cylinder (7) and the second supporting rod (65) are positioned on the same side.
5. The synchronous positioning device for the inner and outer templates of the U-shaped aqueduct according to claim 4, wherein: the first traversing device (41) comprises a traversing oil cylinder (7) which is fixed at the upper end of the upper cross beam (11) and provides transverse driving force for the pulley (14), a cylindrical end (72) of the oil cylinder (7) is fixedly connected with the upper cross beam (11), and a telescopic end (71) is fixedly connected with the pulley (14);
the second traversing device (42) comprises a traversing oil cylinder (7) which is fixed at the bottom of the upper cross beam (11) and provides transverse traction for the support frame (5); the cylindrical end (72) of the oil cylinder (7) is fixedly connected with the upper cross beam (11), and the telescopic end (71) is fixedly connected with an upper transverse support leg (56) arranged in the middle of an upper arm of the support frame (5);
the third traversing device (43) comprises an X-shaped mechanism consisting of 4 inclined stay bars and an oil cylinder (7), one end of each inclined stay bar is hinged with a stay post (54) of the F-shaped frame (51), and the other end of each inclined stay bar is hinged with a telescopic end (71) or a cylindrical end (72) of the oil cylinder (7);
the lower internal mold lifting device (58) comprises a lifting oil cylinder (7) fixedly connected to the lower ends of the support frame upright post (54) and the lower cantilever beam (53), a cylindrical end (72) of the oil cylinder (7) is fixedly connected with the support frame (5), and a telescopic end (71) is fixedly connected with a stiffening plate of the lower internal mold (33).
6. The synchronous positioning device for the inner and outer templates of the U-shaped aqueduct according to claim 5, wherein: the upper inner die (31) is connected with a first opening and closing connecting rod (61) for controlling the opening and closing of the upper inner die; a first stay bar (64) of the first opening and closing connecting rod (61) is hinged with a stiffening plate of the upper inner die (31), and a second stay bar (65) is hinged with a cylindrical end (72) of the oil cylinder (7) and an upper transverse support leg (56);
the middle inner die (32) is connected with a second opening and closing connecting rod (62) for controlling the opening and closing of the middle inner die, a first supporting rod (64) of the second opening and closing connecting rod (62) is hinged with a stiffening plate of the middle inner die (32), and a second supporting rod (65) is hinged with a cylindrical end (72) of the oil cylinder (7) and the stiffening plate of the lower inner die (33);
the lower internal mold (33) is connected with a third opening and closing connecting rod (63) for controlling the opening and closing of the lower internal mold, a first supporting rod (64) of the third opening and closing connecting rod (63) is hinged with a stiffening plate of the bottom sealing mold (34), and a second supporting rod (65) is hinged with a cylindrical end (72) of the oil cylinder (7) and the stiffening plate of the lower internal mold (33).
7. The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct is characterized by comprising the following steps of:
s1: setting up an nth cross-support platform (8);
s2: setting up an n+1th cross support platform (8), and synchronously installing a bottom die (2) of an n-th cross and installing outer layer steel bars within the range of the bottom die (2);
s3: setting up an n+2-th cross support platform (8), synchronously mounting an n+1-th cross bottom die (2), and mounting outer layer reinforcing steel bars within the range of the bottom die (2); the portal frame (1) of the basic section unit is transported to the nth cross support platform (8) section by section with the inner mold (3) and the outer mold (4) until the whole cross basic unit is transported to the position, and outer layer reinforcing steel bars within the range of the inner mold (3) and the outer mold (4) are installed;
s4, pouring nth span concrete, after the strength of the concrete is met, demoulding the inner and outer moulds (4), carrying the nth span inner mould (3) and the outer mould (4) by the door frame (1) to be positioned to an n+1 span at one time, and installing reinforcing steel bars;
s5: transferring the nth span bottom die (2) to an n+2 span bracket platform (8) through hoisting and installing, and pouring concrete of the nth+1 span;
s6: and (5) continuing the circulation process according to the steps S1 to S5 until the process is finished.
8. The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct according to claim 7, which is characterized in that: the support platform (8) erected in the steps S1-S3 is paved with a track which is matched with the travelling wheels (16) of the portal (1) and is convenient for the portal (1) to move.
9. The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct according to claim 7, which is characterized in that: in the step S3, the inner die (3) and the outer die (4) are installed, and the device comprises the following specific operation steps:
s31: the second traversing device (42) and the third traversing device (43) are combined to transversely open the support frame (5); the lower internal mold (33) and the middle internal mold (32) are vertically moved into position by a lower internal mold lifting device (58), and an inner layer reinforcing steel bar within the height range of the bottom mold (2) is installed;
s32: the outer die (4) is pulled to move inwards and be in position by a transverse moving oil cylinder (7) of the outer die (4);
s33: the middle inner die (32) is turned over to be in place through a second opening and closing connecting rod (62), and inner and outer layer steel bars within the height range of the middle inner die (32) are installed;
s34: the upper inner die (31) is turned over to be in place through a first opening and closing connecting rod (61), and inner and outer layer steel bars within the height range of the upper inner die (31) are installed;
s35: and a cross bracing screw rod (9) between the supporting frame (5) and the inner die (3) is installed and locked.
10. The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct according to claim 7, which is characterized in that: in step S4, when concrete is poured, the bottom sealing die (34) is kept in an open state, concrete is poured from the opening of the bottom sealing die (34), when the pouring height reaches the lowest point position of the bottom sealing die (34), the bottom sealing die (34) is turned into position through an opening and closing mechanism of the bottom sealing die (34), and is locked with the adjacent lower internal die (33) through a bolt, and then concrete is poured from two sides of the structure until the pouring is completed.
11. The method for synchronously positioning the inner and outer templates of the U-shaped aqueduct according to claim 7, which is characterized in that: in the step S4, the inner mold and the outer mold (4) are demolded, and the device comprises the following specific operation steps:
s41: dismantling a cross brace screw rod (9) between the support frame (5) and the inner die (3);
s42: the upper inner mould (31) is turned back through the first opening and closing connecting rod (61), and the upper inner mould (31) is separated from the concrete;
s43: the middle internal mold (32) is turned back through a second opening and closing connecting rod (62), and the middle internal mold (32) is separated from the concrete;
s44: the sealing bottom die (34) is turned over and retracted through a third opening and closing connecting rod (63), and the sealing bottom die (34) is separated from the concrete;
s45: the lower internal mold (33) and the middle internal mold (32) are vertically lifted by a lower internal mold lifting device (58), and the lower internal mold (33) is separated from the concrete;
s46: the support frame (5) is transversely contracted through the second transverse moving device (42) and the third transverse moving device (43), and the gap between the inner mould (3) and the concrete is further enlarged;
s47: the outer mould (4) is translated outwards by the first traversing device (41), and the outer mould (4) is separated from the concrete.
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| CN202210950354.7A CN115351884B (en) | 2022-08-09 | 2022-08-09 | Synchronous positioning device and method for inner and outer templates of U-shaped aqueduct |
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| CN202210950354.7A CN115351884B (en) | 2022-08-09 | 2022-08-09 | Synchronous positioning device and method for inner and outer templates of U-shaped aqueduct |
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| CN115351884A (en) | 2022-11-18 |
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