CN114227897A - Device and method for prefabricating UHPC column mold shell - Google Patents

Device and method for prefabricating UHPC column mold shell Download PDF

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Publication number
CN114227897A
CN114227897A CN202111636676.6A CN202111636676A CN114227897A CN 114227897 A CN114227897 A CN 114227897A CN 202111636676 A CN202111636676 A CN 202111636676A CN 114227897 A CN114227897 A CN 114227897A
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China
Prior art keywords
die
wall
mold
face
outer die
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CN202111636676.6A
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Chinese (zh)
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CN114227897B (en
Inventor
陈兆荣
朱敏涛
刘殿生
朱天龙
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Shanghai Construction Building Materials Technology Group Co Ltd
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Shanghai Construction Building Materials Technology Group Co Ltd
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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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/14—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material
    • B28B21/16—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means vibrating, e.g. the surface of the material one or more mould elements
    • 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
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/18—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements
    • B28B21/20—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements using inflatable cores, e.g. having a frame inside the inflatable part of the core
    • B28B21/205—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements using inflatable cores, e.g. having a frame inside the inflatable part of the core having a rigid frame inside the inflatable part of the core
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/76—Moulds
    • B28B21/82—Moulds built-up from several parts; Multiple moulds; Moulds with adjustable parts
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/90—Methods or apparatus for demoulding or discharging after shaping
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

The invention relates to a UHPC column formwork shell prefabricating device which comprises an outer die, an inner die, a bottom die, an operating platform, an escalator, a distributing device and a top cover plate, wherein the lower end face of the bottom die is fixedly arranged on the platform, the inner die is arranged on the upper end face of the bottom die, the outer die is arranged on the outer side of the inner die, the bottom end face of the outer die is connected with the upper end face of the bottom die, the operating platform is arranged on the side face of the upper part of the outer die, the distributing device is arranged on the upper end face of the outer die, the top cover plate is arranged on the upper end face of the distributing device, and constructors can enter and exit the operating platform through the movable escalator. According to the invention, the supporting device is arranged on the inner wall of the inner mold, and after the concrete pouring is finished, the inner mold is separated from the inner wall of the concrete through shrinkage, so that the construction efficiency is improved; the outer die is spliced by the eccentric quick locking device, so that the splicing precision and the use safety of the outer die are improved.

Description

Device and method for prefabricating UHPC column mold shell
Technical Field
The invention relates to the field of constructional engineering, in particular to a device and a method for prefabricating a UHPC column formwork.
Background
With the continuous development of urbanization and the continuous promotion of building industrialization, the application of the assembly type construction technology is more and more extensive, except for civil house buildings and traffic road engineering construction, large public buildings also gradually start to adopt an assembly type construction mode, on one hand, the assembly type construction method is beneficial to accelerating the construction progress, and on the other hand, the assembly type construction method accords with the environment-friendly development concept. However, due to the characteristic of large space of a large public building, the size of the member is large, and a series of problems are brought to transportation and hoisting, so that the whole prefabricated structure is turned to local prefabrication, and the outer shell member of the ultra-high strength concrete prefabricated structure is transported to a site for installation and then internal concrete pouring is carried out.
Patent number CN108612189A discloses an assembled concrete frame structure with locally enhanced prefabricated UHPC shell, which comprises a column base annular prefabricated UHPC shell, a prefabricated concrete column, a beam end U-shaped UHPC shell and a prefabricated concrete superposed beam; the prefabricated concrete column is provided with an annular prefabricated UHPC shell at the column base part; the column base annular prefabricated UHPC shell is prefabricated with the stirrup and the grouting sleeve into a whole; the beam end of the precast concrete superposed beam forms a U-shaped key slot through a U-shaped precast UHPC shell; the U-shaped UHPC shell at the beam end and the stirrups are prefabricated into a whole, and the lower part of the precast concrete composite beam adopts small-specification high-strength steel bars; after the superposed beam is in place, binding longitudinal bars on the upper part of the beam, and then pouring superposed layer concrete in situ to form an integral structure.
The Ultra-High Performance Concrete (UHPC for short) has excellent performances of Ultra-High strength, High toughness, High impermeability, High corrosion resistance and the like, and is expected to become a basic material for the construction of the next generation of infrastructure.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a method for prefabricating a UHPC column formwork.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
a pre-setting device for a UHPC column formwork shell comprises an outer die, an inner die, a bottom die, an operating platform, a movable staircase, a distributing device and a top cover plate, wherein the lower end face of the bottom die is fixedly installed on a construction platform, the inner die is installed on the upper end face of the bottom die, the outer die is installed on the outer side of the inner die, the bottom end face of the outer die is connected with the upper end face of the bottom die, the operating platform is installed on the side face of the upper part of the outer die, constructors can enter and exit the operating platform through the movable staircase, the distributing device is installed on the upper end face of the outer die, and the top cover plate is installed on the upper end face of the distributing device; the outer die is integrally in a hollow cylinder shape, the outer die is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die are fixedly connected through an eccentric quick locking device; the inner die is integrally in a hollow cylinder shape and comprises two semicircular steel plates and two arc-shaped plates, the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates, a plurality of inner die supporting devices are installed on the inner wall of the inner die and comprise inner die movable doors, rotating shaft screws and central lifting devices; the center lifting device is installed in the center of the inner mold, the side face of the center lifting device is connected with one end of the rotating shaft screw rod respectively, the other end of the rotating shaft screw rod is connected with one end of the inner mold adjustable door respectively, the other end of the inner mold adjustable door is connected with the inner wall of the arc-shaped plate respectively, and the side face of the inner mold adjustable door is connected with the inner wall of the inner mold through bolts.
The end faces of the bottoms of the outer mold and the inner mold are all installed on the end face of the upper portion of the bottom mold, the end faces of the outer mold and the inner mold and the end face of the bottom mold are in the same circle center, the distance between the outer mold and the inner mold is not more than 35mm, the heights of the outer mold and the inner mold are larger than or equal to 4500mm, the distance between the outer mold and the inner mold is used for high-strength UHPC concrete pouring, and the strength grade of a poured column mold shell is larger than or equal to 100 Mpa.
The outer die is processed through a high-precision numerical control machine tool, the outer wall of the outer die is sprayed with paint through shot blasting and sand blasting, the annular flange plates are connected with the outer wall of the outer die, a plurality of annular flange plates are connected to the outer wall of the outer die, the annular flange plates are perpendicular to the length direction of the outer die, the annular flange plates are installed in parallel, the vertical rib plates are installed on the outer wall of the outer die and distributed on the outer wall of the outer die at even intervals, and the vertical rib plates are parallel to the length direction of the outer die.
There is the through-hole two semi-circular steel sheet concatenation department terminal surfaces of above-mentioned external mold, the quick locking device of eccentric formula passes through two semi-circular steel sheet concatenation department through-hole fixed connection of external mold two semi-circular steel sheets of external mold, the quick locking device symmetric distribution of eccentric formula is in external mold concatenation department, external mold concatenation department is provided with the rubber strip, the external mold with the die block junction is provided with the rubber strip.
Among the above-mentioned centre form strutting arrangement center pulling device passes through the center hoisting frame and connects, center hoisting frame with centre form terminal surface center connecting line coincidence, the square hollow tube of center hoisting frame outer wall installation, square hollow tube outer wall with the centre form inner wall passes through the bracing piece and connects, center hoisting frame is in reciprocate in the square hollow tube, center hoisting frame is in the loose door shrink of centre form is driven through the pivot screw rod when reciprocating in the square hollow tube, centre form inner wall the superiors are installed center pulling device upper portion end-face mounting platform sling, there is the through-hole on the platform sling, semi-circular steel sheet in the centre form is provided with the rubber strip with the arc concatenation department, the centre form with the die block junction is provided with the rubber strip.
The inner die is processed through a high-precision numerical control machine tool, the circumferential flange plates are connected with the inner wall of the inner die, a plurality of circumferential flange plates are connected on the inner wall of the inner die, the circumferential flange plates are perpendicular to the length direction of the inner die, the circumferential flange plates are installed in parallel, the vertical rib plates are installed on the inner wall of the inner die, the vertical rib plates are distributed on the inner wall of the inner die at even intervals, and the vertical rib plates are parallel to the length direction of the inner die.
The whole bottom die is cylindrical, the bottom die comprises a bottom die circular table and a panel, the upper end face of the bottom die circular table and the bottom end face of the panel are fixedly welded through a rib plate, and the panel is cylindrical.
A method for prefabricating a UHPC column formwork specifically comprises the following steps:
the method comprises the steps that firstly, a special UHPC column formwork prefabricating device is prepared, the device comprises an outer die, an inner die, a bottom die, an operating platform, a movable staircase, a distributing device and a top cover plate, the lower end face of the bottom die is fixedly installed on the operating platform, the inner die is installed on the upper end face of the bottom die, the outer die is installed on the outer side of the inner die, the bottom end face of the outer die is connected with the upper end face of the bottom die, the operating platform is installed on the side face of the upper portion of the outer die, a constructor can enter and exit the operating platform through the movable staircase, the distributing device is installed on the upper end face of the outer die, and the top cover plate is installed on the upper end face of the distributing device; the outer die is integrally in a hollow cylinder shape, the outer die is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die are fixedly connected through an eccentric quick locking device; the inner die is integrally in a hollow cylinder shape and comprises two semicircular steel plates and two arc-shaped plates, the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates, a plurality of inner die supporting devices are installed on the inner wall of the inner die and comprise inner die movable doors, rotating shaft screws and central lifting devices; the center lifting device is installed in the center of the inner mold, the side surface of the center lifting device is respectively connected with one end of the rotating shaft screw rod, the other end of the rotating shaft screw rod is respectively connected with one end of the inner mold flexible door, the other end of the inner mold flexible door is respectively connected with the inner wall of the arc-shaped plate, and the side surface of the inner mold flexible door is connected with the inner wall of the inner mold through a bolt;
fixing the bottom die on a construction platform, and coating a release agent on a panel of the bottom die;
thirdly, after the bottom die is installed, firstly coating a release agent on the outer wall of the inner die, and after coating, hoisting the inner die to the bottom die by a hoisting machine to connect and fix the bottom end surface of the inner die with the upper end surface of the bottom die;
fourthly, after the inner die is installed, coating a release agent on the inner wall of the outer die, installing and fixing attached vibration equipment on the outer wall of the outer die, wherein the attached vibration equipment is symmetrically distributed on the inner wall of the outer die from bottom to top, and finally, respectively hoisting the two semicircular steel plates of the outer die onto a bottom die panel, and connecting the bottom end surfaces of the two semicircular steel plates of the outer die with the upper end surface of the bottom die, so that through holes at the splicing positions of the two semicircular steel plates of the outer die are overlapped and connected and fixed through an eccentric quick locking device;
fifthly, after the outer die is installed, respectively embedding a film shell perforating piece at the upper part and the lower part between the inner die and the outer die, and then carrying out splicing inspection on the outer die and the inner die;
sixthly, after the outer die and the inner die are spliced and inspected to be qualified, an operation platform is installed on the upper portion of the outer die, a constructor moves a staircase to enter and exit the operation platform, a distributing device is installed on the end faces of the upper portions of the outer die and the inner die, and a top cover plate is installed on the end face of the top of the distributing device to enable the top of the inner die to be in a closed state;
seventhly, after the distributing device and the top cover plate are installed, the constructor enters and exits the operation platform through the moving staircase to pour concrete;
eighthly, gradually opening the attached vibrator on the outer wall of the outer die along with the rising of the concrete pouring height in the concrete pouring process, and simultaneously inserting two inserted vibrating rods into the space between the outer die and the inner die to match with the attached vibrator for pouring and vibrating;
ninth, when the concrete pouring is finished and the concrete strength is met, the formwork is disassembled, the operating platform and the distributing device on the upper portion of the outer formwork are removed firstly, then the top cover plate on the end face of the upper portion of the inner formwork is removed, the crane is enabled to lift the lifting platform on the device through the center of the top of the inner formwork, the lifting platform drives the center lifting frame to enable the inner formwork loose door to respectively contract downwards and inwards, the inner formwork loose door drives the arc-shaped plate to move towards the inside of the inner formwork to enable the diameter of the inner formwork to be reduced, the inner formwork is separated from the inner wall of the concrete which is finished to be poured, after the inner formwork is disassembled, the eccentric quick locking device is opened, and then the two semicircular steel plates of the outer formwork are respectively separated from the outer wall of the concrete which is finished to be poured, so that the demoulding work of the column formwork is finished;
and step ten, after the demolding of the column formwork shell is finished, hoisting the column formwork shell at a construction position through a formwork opening on the column formwork shell, and then pouring concrete in the column formwork shell.
When the inner mold in the third step is installed on the upper end face of the bottom mold, the adjusting basket and the inner mold adjustable door in the supporting device on the inner wall of the inner mold are perpendicular to the inner wall of the inner mold, and the diameter of the inner wall of the inner mold is supported to the maximum.
The distributor in the seventh step is integrally in an open funnel shape and comprises two ring-shaped parts, the two ring-shaped parts are respectively installed on the top end face of the inner die and the top end face of the outer die and connected through a triangular plate, the triangular plate is uniformly distributed on the ring-shaped parts, and through holes are formed in the triangular plate.
Based on the scheme, the device and the method of the invention have the following positive and beneficial effects through practical application:
1. according to the invention, the supporting device is arranged on the inner wall of the inner mold, after concrete pouring is finished, the inner mold is contracted to be separated from the inner wall of the concrete by lifting the central lifting device, so that the inner mold is convenient to dismantle, and the construction efficiency is improved.
2. According to the invention, the two semicircular steel plates of the outer die are fixedly connected through the eccentric quick locking device, so that the safety during concrete pouring is improved, the outer die has an explosion-proof function, and meanwhile, the installation efficiency of the outer die is improved through the eccentric quick locking device.
3. The distributing devices are arranged on the end faces of the upper parts of the outer die and the inner die, so that concrete can be poured conveniently, the pouring rate of the concrete is improved, and the attached vibrator and the inserted vibrator are adopted for pouring and vibrating the concrete, so that the quality of a molding surface after the concrete is poured is improved.
Drawings
Fig. 1 is an overall assembly view of a column mold shell prefabricating apparatus for a UHPC column mold shell prefabricating apparatus according to the present invention.
Fig. 2 is a cross-sectional view of a column-mold shell prefabricating apparatus for a UHPC column-mold shell prefabricating apparatus according to the present invention.
Fig. 3 is a top view of an outer mold of the present invention used in a UHPC column mold shell preparation apparatus.
Fig. 4 is a top view of an inner mold of the present invention used in a UHPC column mold shell preparation apparatus.
Fig. 5 is a cross-sectional view of a column-die housing used in a UHPC column-die housing preparation apparatus according to the present invention.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will now be described by way of example only, as illustrated in the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the device for pre-forming the UHPC column formwork shell comprises an outer die 1, an inner die 13, a bottom die 14, an operating platform 2, a movable escalator 4, a distributing device 8 and a top cover plate 3, wherein the lower end surface of the bottom die 14 is fixedly installed on a construction platform, the inner die 13 is installed on the upper end surface of the bottom die 14, the outer die 1 is installed on the outer side of the inner die 13, the bottom end surface of the outer die 1 is connected with the upper end surface of the bottom die 14, the operating platform 2 is installed on the upper side surface of the outer die 1, a constructor can enter and exit the operating platform 2 through the movable escalator 4, the distributing device 8 is installed on the upper end surface of the outer die 1, and the top cover plate 3 is installed on the upper end surface of the distributing device 8; the outer die 1 is integrally in a hollow cylinder shape, the outer die 1 is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die 1 are connected and fixed through an eccentric quick locking device 5; the whole inner mold 13 is in a hollow cylinder shape, the inner mold 13 comprises two semicircular steel plates and two arc-shaped plates 17, the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates 17, a plurality of inner mold supporting devices are installed on the inner wall of the inner mold 13, and each inner mold supporting device comprises an inner mold flexible door 12, a rotating shaft screw rod 11 and a center lifting device 10; the central lifting device 10 is installed in the center of the inner mold 13, the side surface of the central lifting device 10 is respectively connected with one end of the rotating shaft screw rod 11, the other end of the rotating shaft screw rod 11 is respectively connected with one end of the inner mold flexible door 12, the other end of the inner mold flexible door 12 is respectively connected with the inner wall of the arc-shaped plate 17, and the side surface of the inner mold flexible door 12 is connected with the inner wall of the inner mold 13 through bolts.
The end surfaces of the bottoms of the outer die 1 and the inner die 13 are both installed on the end surface of the upper part of the bottom die 14, the end surfaces of the outer die 1 and the inner die 13 and the end surface of the bottom die 14 are in the same circle center, the distance between the outer die 1 and the inner die 13 is not more than 35mm, the heights of the outer die 1 and the inner die 13 are not less than 4500mm, the distance between the outer die 1 and the inner die 13 is used for high-strength UHPC concrete pouring, and the strength grade of a poured column die shell 19 is not less than 100 Mpa; the outer die 1, the inner die 13 and the bottom die 14 have the same circle center, so that the stability of the column die shell 19 in the installation process is improved, and the safety of subsequent concrete pouring is improved.
Above-mentioned external mold 1 is through high accuracy numerical control machine tool machining, 1 outer wall of external mold sprays paint through throwing ball sandblast, hoop flange board 6 with 1 outer wall connection of external mold, connect a plurality of hoop flange boards 6 on 1 outer wall of external mold, hoop flange board 6 with 1 length direction of external mold is perpendicular, hoop flange board 6 parallel mount, erect gusset 7 and install on 1 outer wall of external mold, erect gusset 7 with even interval distribution is in on 1 outer wall of external mold, erect gusset 7 with 1 length direction of external mold is parallel, and external mold 1 is 6mm steel sheet system, hoop flange board 6 adopts thick 12mm steel sheet, wide 120mm steel sheet system, and perpendicular gusset 7 adopts 10mm channel-section steel, and hoop flange board 6 and perpendicular gusset 7 have improved the bulk strength of external mold, have improved the security of follow-up concrete placement.
The end surfaces of the splicing positions of the two semicircular steel plates of the outer mold 1 are provided with through holes, the eccentric type quick locking devices 5 are fixedly connected with the two semicircular steel plates of the outer mold 1 through the through holes of the splicing positions of the two semicircular steel plates of the outer mold 1, the eccentric type quick locking devices 5 are symmetrically distributed at the splicing positions of the outer mold 1, and rubber strips are arranged at the splicing positions of the outer mold 1; the rubber strips arranged at the splicing positions of the outer die 1 improve the sealing performance of the splicing positions of the outer die 1, and prevent slurry leakage during concrete pouring.
The central lifting device 10 in the inner mold 13 supporting device is connected through a central lifting frame 101, the central lifting frame 101 is overlapped with a central connecting line of the end face of the inner mold 13, a square hollow tube 16 is installed on the outer wall of the central lifting frame 101, the outer wall of the square hollow tube 16 is connected with the inner wall of the inner mold 13 through a supporting rod 15, the central lifting frame 101 moves up and down in the square hollow tube 16, the central lifting frame 101 drives the inner mold movable door 12 to contract through a rotating shaft screw rod 11 when moving up and down in the square hollow tube 16, a hanging platform 9 is installed on the end face of the upper part of the central lifting device 10 installed on the uppermost layer of the inner wall of the inner mold 13, a through hole is formed in the hanging platform 9, a rubber strip is arranged at the splicing part of a semicircular steel plate and an arc-shaped plate 17 in the inner mold 13, and a rubber strip is arranged at the connecting part of the inner mold 13 and the bottom mold 14; the rubber strip that centre form 13 concatenation department set up has improved the leakproofness of centre form 13 concatenation department, leaks thick liquid when preventing concrete placement.
The inner mold 13 is processed by a high-precision numerical control machine, the circumferential flange plates are connected with the inner wall of the inner mold 13, a plurality of circumferential flange plates are connected on the inner wall of the inner mold 13, the circumferential flange plates are perpendicular to the length direction of the inner mold 13, the circumferential flange plates are installed in parallel, the vertical rib plates are installed on the inner wall of the inner mold 13, the vertical rib plates are distributed on the inner wall of the inner mold 13 at uniform intervals, and the vertical rib plates are parallel to the length direction of the inner mold 13; the circumferential flange plates and the vertical rib plates improve the overall strength of the inner die 13 and improve the safety of subsequent concrete pouring.
The whole bottom die 14 is cylindrical, the bottom die 14 comprises a circular table of the bottom die and a face plate, the upper end surface of the circular table of the bottom die 14 is welded and fixed with the bottom end surface of the face plate through a rib plate, and the face plate is cylindrical; the diameter of the bottom die 14 is 1800mm, the height of the bottom die is 170mm, the panel is a steel plate with the thickness of 20mm, the rib plate is a steel plate with the thickness of 1200mm, and the steel plate is arranged on the end face of the upper part of the bottom die 14, so that the bearing performance of the bottom die 14 is improved, and the pouring safety of concrete is improved.
The invention also provides a method for prefabricating a UHPC column formwork, which comprises the following steps:
firstly, preparing a special UHPC column formwork prefabricating device, wherein the special UHPC column formwork prefabricating device comprises an outer mold 1, an inner mold 13, a bottom mold 14, an operating platform 2, a movable escalator 4, a distributor 8 and a top cover plate 3, wherein the lower end face of the bottom mold 14 is fixedly arranged on a construction platform, the inner mold 13 is arranged on the upper end face of the bottom mold 14, the outer mold 1 is arranged on the outer side of the inner mold 13, the bottom end face of the outer mold 1 is connected with the upper end face of the bottom mold 14, the operating platform 2 is arranged on the side face of the upper part of the outer mold 1, a constructor enters and exits the operating platform 2 through the movable escalator 4, the distributor 8 is arranged on the upper end face of the outer mold 1, and the top cover plate 3 is arranged on the upper end face of the distributor 8; the outer die 1 is integrally in a hollow cylinder shape, the outer die 1 is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die 1 are connected and fixed through an eccentric quick locking device 5; the whole inner mold 13 is in a hollow cylinder shape, the inner mold 13 comprises two semicircular steel plates and two arc-shaped plates 17, the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates 17, a plurality of inner mold supporting devices are installed on the inner wall of the inner mold 13, and each inner mold supporting device comprises an inner mold flexible door 12, a rotating shaft screw rod 11 and a center lifting device 10; the central lifting device 10 is installed in the center of the inner mold 13, the side surface of the central lifting device 10 is respectively connected with one end of the rotating shaft screw rod 11, the other end of the rotating shaft screw rod 11 is respectively connected with one end of the inner mold flexible door 12, the other end of the inner mold flexible door 12 is respectively connected with the inner wall of the arc-shaped plate 17, and the side surface of the inner mold flexible door 12 is connected with the inner wall of the inner mold 13 through bolts;
secondly, fixing the bottom die 14 on the platform, and coating a release agent on the upper end surface of the bottom die 14; the mold release agent is separated from the bottom mold 14 after the concrete pouring is completed;
thirdly, after the bottom die 14 is installed, firstly coating a release agent on the inner wall of the inner die 13, and after the coating is finished, hoisting the inner die 13 to the bottom die 14 through a hoisting machine to connect and fix the bottom end surface of the inner die 13 and the upper end surface of the bottom die 14; the mold release agent facilitates separation of the column mold shell 19 from the inner 13 mold after the concrete pouring is completed;
fourthly, after the inner die 13 is installed, a release agent is coated on the inner wall of the outer die 1, and attached vibration equipment is installed and fixed on the inner wall of the outer die 1, the attached vibration equipment is symmetrically distributed on the outer wall of the outer die 1 from bottom to top, finally, two semicircular steel plates of the outer die 1 are respectively hoisted on a panel of the bottom die 14, the bottom end surfaces of the two semicircular steel plates of the outer die 1 are connected with the upper end surface of the bottom die 14, so that through holes at the splicing position of the two semicircular steel plates of the outer die 1 are overlapped and connected and fixed through an eccentric quick locking device 5; the mold release agent is separated from the outer mold 1 after the concrete pouring is finished so as to facilitate the column mold shell 19 to be separated from the outer mold 1;
fifthly, after the outer die 1 is installed, respectively embedding a film shell perforating piece at the upper part and the lower part between the inner die 13 and the outer die 1, and then splicing and inspecting the outer die 1 and the inner die 13;
sixthly, after the outer die 1 and the inner die 13 are spliced and inspected to be qualified, an operation platform 2 is installed on the upper portion of the outer die 1, a constructor enters and exits the operation platform 2 by moving the escalator 4, a distributing device 8 is installed on the end faces of the upper portions of the outer die 1 and the inner die 13, and a top cover plate 3 is installed on the end face of the top of the distributing device 8 to enable the top of the inner die 13 to be in a closed state;
seventhly, after the distributing device 8 and the top cover plate 3 are installed, the constructor enters and exits the operating platform 2 through the moving staircase 4 to pour concrete;
eighthly, in the process of pouring the concrete, gradually opening the attached vibrator on the outer wall of the outer die 1 along with the rising of the height of the poured concrete, and simultaneously inserting two inserted vibrating rods into the space between the outer die 1 and the inner die 13 to match with the attached vibrator for pouring and vibrating;
ninth, when the concrete pouring is finished and the concrete strength is met, the formwork is disassembled, the operating platform 2 and the distributing device 8 on the upper portion of the outer formwork 1 are removed, then the top cover plate 3 on the end face of the upper portion of the inner formwork is removed, a crane is enabled to lift a lifting platform 9 on a central lifting device 10 on the top of the inner formwork 13, the lifting platform 9 drives a central lifting frame 101 to enable an inner formwork loose door 12 to respectively contract downwards and inwards the inner formwork 13, the inner formwork loose door 12 drives an arc-shaped plate 17 to move inwards the inner formwork 13, the diameter of the inner formwork 13 is reduced, the inner formwork 13 is separated from the inner wall of the concrete which is poured, after the inner formwork 13 is disassembled, the eccentric quick locking device 5 is opened, then two semicircular steel plates of the outer formwork 1 are respectively separated from the outer wall of the concrete which is poured, and the demoulding work of the column formwork 19 is finished;
tenth, after the demolding of the column formwork 19 is completed, the column formwork 19 is hoisted to the construction position through the formwork opening 18 on the column formwork 19, and then the concrete inside the column formwork 19 is poured.
When the inner mold 13 in the third step is installed on the upper end face of the bottom mold 14, the rotating shaft screw 11 and the inner mold flexible door 12 in the supporting device on the inner wall of the inner mold 13 are vertical to the inner wall of the arc-shaped plate 17, so that the diameter of the inner wall of the inner mold 13 is supported to the maximum; the diameter of the inner mold 13 is in the maximum state, so that the distance between the inner mold 13 and the outer mold 1 meets the pouring requirement, the side surface of the inner mold 13 is in a closed state, slurry leakage during concrete pouring is avoided, and the installation stability of the inner mold 13 is improved; the connecting distance between the inner mold flexible door 12 and the central pulling device 10 can be flexibly adjusted by the rotating shaft screw 11, and the supporting strength of the inner mold flexible door 12 is ensured.
Above-mentioned distributing device 8 in the seventh step wholly is open funnel formula shape, distributing device 8 comprises two ring-forming components, and two ring-forming components are installed respectively 13 top end faces of centre form with on 1 top end face of external mold, two ring-forming components pass through the set-square and connect, set-square evenly distributed is on the ring-forming component, it has the through-hole to open on the set-square, and the set-square round hole on the distributing device 8 makes things convenient for distributing device 8's installation and dismantlement, has improved distributing device 8 bulk strength simultaneously.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (10)

1. The device for pre-preparing the UHPC column formwork shell is characterized by comprising an outer die (1), an inner die (13), a bottom die (14), an operation platform (2), a movable escalator (4), a material distributor (8) and a top cover plate (3), wherein the lower end face of the bottom die (14) is fixedly installed on the construction platform, the inner die (13) is installed on the upper end face of the bottom die (14), the outer die is installed on the outer side of the inner die (13), the bottom end face of the outer die (1) is connected with the upper end face of the bottom die (14), the operation platform (2) is installed on the upper side face of the outer die (1), constructors can enter and exit the operation platform (2) through the movable escalator (4), the material distributor (8) is installed on the upper end face of the outer die (1), and the top cover plate (3) is installed on the upper end face of the material distributor; the outer die (1) is integrally in a hollow cylinder shape, the outer die (1) is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die (1) are fixedly connected through an eccentric quick locking device (5); the whole inner mold (13) is in a hollow cylinder shape, the inner mold (13) comprises two semicircular steel plates and two arc-shaped plates (17), the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates (17), a plurality of inner mold supporting devices are installed on the inner wall of the inner mold (13), and each inner mold supporting device comprises an inner mold flexible door (12), a rotating shaft screw rod (11) and a center lifting device (10); the center lifting device (10) is installed in the center of the inner mold (13), the side face of the center lifting device (10) is connected with one end of the rotating shaft screw rod (11) respectively, the other end of the rotating shaft screw rod (11) is connected with one end of the inner mold flexible door (12) respectively, the other end of the inner mold flexible door (12) is connected with the inner wall of the arc-shaped plate (17) respectively, and the side face of the inner mold flexible door (12) is connected with the inner wall of the inner mold (13) through bolts.
2. The device for prefabricating the UHPC column formwork shell according to claim 1, wherein the end surfaces of the bottoms of the outer die (1) and the inner die (13) are both installed on the end surface of the upper part of the bottom die (14), the end surfaces of the outer die (1) and the inner die (13) are in the same circle center as the end surface of the bottom die (14), the distance between the outer die (1) and the inner die (13) is not more than 35mm, the heights of the outer die (1) and the inner die (13) are more than or equal to 4500mm, the distance between the outer die (1) and the inner die (13) is used for high-strength UHPC concrete pouring, and the strength grade of the poured column formwork shell (19) is more than or equal to 100 Mpa.
3. The device for pre-preparing the UHPC column die shell is characterized in that the outer die (1) is processed by a high-precision numerical control machine tool, the outer wall of the outer die (1) is sprayed with paint by shot blasting, sand blasting and spray painting, the circumferential flange plates (6) are connected with the outer wall of the outer die (1), the outer wall of the outer die (1) is connected with a plurality of circumferential flange plates (6), the circumferential flange plates (6) are perpendicular to the outer die (1) in the length direction, the circumferential flange plates (6) are installed in parallel, the vertical rib plates (7) are installed on the outer wall of the outer die (1), the vertical rib plates (7) are distributed on the outer wall of the outer die (1) at uniform intervals, and the vertical rib plates (7) are parallel to the outer die (1) in the length direction.
4. The UHPC column die shell prefabricating device according to claim 1, wherein through holes are formed in the end faces of the splicing positions of the two semicircular steel plates of the outer die (1), the eccentric type quick locking devices (5) are fixedly connected with the two semicircular steel plates of the outer die (1) through the through holes of the splicing positions of the two semicircular steel plates of the outer die (1), the eccentric type quick locking devices (5) are symmetrically distributed at the splicing positions of the outer die (1), rubber strips are arranged at the splicing positions of the outer die (1), and the rubber strips are arranged at the connecting positions of the outer die (1) and the bottom die (14).
5. The UHPC column formwork shell prefabricating device as claimed in claim 1, wherein the central lifting device (10) in the inner mould supporting device is connected through a central lifting frame (101), the central lifting frame (101) is overlapped with a central connecting line of the end face of the inner mould (13), a square hollow pipe (16) is installed on the outer wall of the central lifting frame (101), the outer wall of the square hollow pipe (16) is connected with the inner wall of the inner mould (13) through a supporting rod (15), the central lifting frame (101) moves up and down in the square hollow pipe (16), the central lifting frame (101) drives the inner mould movable door (12) to be contracted through a rotating shaft screw rod (11) when moving up and down in the square hollow pipe (16), and a hanging platform (9) is installed on the upper end face of the central lifting device (10) installed on the uppermost layer of the inner wall of the inner mould (13), the hanging platform (9) is provided with a through hole, a rubber strip is arranged at the splicing position of the semicircular steel plate and the arc plate (17) in the internal mold (13), and the rubber strip is arranged at the connecting position of the internal mold (13) and the bottom mold (14).
6. The UHPC column die shell prefabricating device according to claim 1, characterized in that the inner die (13) is machined through a high-precision numerical control machine tool, the circumferential flange plates are connected with the inner wall of the inner die (13), a plurality of circumferential flange plates are connected on the inner wall of the inner die (13), the circumferential flange plates are perpendicular to the length direction of the inner die (13), the circumferential flange plates are installed in parallel, the vertical rib plates are installed on the inner wall of the inner die (13), the vertical rib plates are distributed on the inner wall of the inner die (13) at uniform intervals, and the vertical rib plates are parallel to the length direction of the inner die (13).
7. The device for pre-forming the UHPC column die shell according to claim 1, characterized in that the whole bottom die (14) is cylindrical, the bottom die (14) comprises a circular table of the bottom die and a face plate, the upper end surface of the circular table of the bottom die (14) and the bottom end surface of the face plate are welded and fixed through a rib plate, and the face plate is cylindrical.
8. A method for prefabricating a UHPC column formwork is characterized by comprising the following steps:
the method comprises the steps that firstly, a special UHPC column formwork prefabricating device is prepared, the device comprises an outer die (1), an inner die (13), a bottom die (14), an operating platform (2), a movable escalator (4), a distributing device (8) and a top cover plate (3), the lower end face of the bottom die (14) is fixedly installed on the construction platform, the inner die (13) is installed on the upper end face of the bottom die (14), the outer die is installed on the outer side of the inner die (13), the bottom end face of the outer die (1) is connected with the upper end face of the bottom die (14), the operating platform (2) is installed on the upper side face of the outer die (1), constructors can enter and exit the operating platform (2) through the movable escalator (4), the distributing device (8) is installed on the upper end face of the outer die (1), and the top cover plate (3) is installed on the upper end face of the distributing device (8); the outer die (1) is integrally in a hollow cylinder shape, the outer die (1) is formed by splicing two semicircular steel plates, and the splicing positions of the two semicircular steel plates of the outer die (1) are fixedly connected through an eccentric quick locking device (5); the whole inner mold (13) is in a hollow cylinder shape, the inner mold (13) comprises two semicircular steel plates and two arc-shaped plates (17), the side surfaces of the semicircular steel plates are respectively connected with the side surfaces of the arc-shaped plates (17), a plurality of inner mold supporting devices are installed on the inner wall of the inner mold (13), and each inner mold supporting device comprises an inner mold flexible door (12), a rotating shaft screw rod (11) and a center lifting device (10); the center lifting device (10) is installed in the center of the inner mold (13), the side face of the center lifting device (10) is respectively connected with one end of the rotating shaft screw rod (11), the other end of the rotating shaft screw rod (11) is respectively connected with one end of the inner mold flexible door (12), the other end of the inner mold flexible door (12) is respectively connected with the inner wall of the arc-shaped plate (17), and the side face of the inner mold flexible door (12) is connected with the inner wall of the inner mold (13) through a bolt;
secondly, fixing the bottom die (14) on a construction platform, and coating a release agent on a panel of the bottom die (14);
thirdly, after the bottom die (14) is installed, firstly coating a release agent on the outer wall of the inner die (13), after the coating is finished, hoisting the inner die (13) to the bottom die (14) through a hoisting machine, and connecting and fixing the bottom end surface of the inner die (13) and the upper end surface of the bottom die (14);
fourthly, after the inner die (13) is installed, a release agent is coated on the inner wall of the outer die (1), attached vibration equipment is installed and fixed on the inner wall of the outer die (1), the attached vibration equipment is symmetrically distributed on the outer wall of the outer die (1) from bottom to top, finally, two semicircular steel plates of the outer die (1) are respectively hoisted on a panel of the bottom die (14), the bottom end surfaces of the two semicircular steel plates of the outer die (1) are connected with the upper end surface of the bottom die (14), and through holes at the splicing positions of the two semicircular steel plates of the outer die (1) are overlapped and connected and fixed through an eccentric quick locking device (5);
fifthly, after the outer die (1) is installed, respectively embedding a die shell perforating piece at the upper part and the lower part between the inner die (13) and the outer die (1), and then splicing and inspecting the outer die (1) and the inner die (13);
sixthly, after the outer mold (1) and the inner mold (13) are spliced and inspected to be qualified, an operation platform (2) is installed on the upper portion of the outer mold (1), a constructor enters and exits the operation platform (2) through a movable escalator (4), a distributing device (8) is installed on the end faces of the upper portions of the outer mold (1) and the inner mold (13), and a top cover plate (3) is installed on the end face of the top of the distributing device (8), so that the top of the inner mold (13) is in a closed state;
seventhly, after the distributor (8) and the top cover plate (3) are installed, a constructor enters and exits the operation platform (2) through the moving staircase (4) to pour concrete;
eighthly, gradually opening the attached vibrator on the outer wall of the outer die (1) along with the rising of the concrete pouring height in the concrete pouring process, and simultaneously inserting two inserted vibrating rods into the space between the outer die (1) and the inner die (13) to be matched with the attached vibrator for pouring and vibrating;
ninth, when the concrete pouring is finished and the concrete strength is met, the formwork is disassembled, the operation platform (2) and the distributing device (8) on the upper portion of the outer formwork (1) are removed firstly, then the top cover plate (3) on the upper end face of the inner formwork (13) is removed, a crane is enabled to lift a lifting platform (9) on a lifting device (10) at the top center of the inner formwork (13), the lifting platform (9) enables an inner formwork loose door (12) to respectively shrink downwards and inwards the inner formwork (13) through driving a center lifting frame (101), the inner formwork loose door (12) drives an arc-shaped plate (17) to move inwards the inner formwork (13) to enable the diameter of the inner formwork (13) to be reduced, the inner formwork (13) is separated from the inner wall of the poured concrete, after the inner formwork (13) is dismantled, the eccentric quick locking device (5) is opened, and then two semicircular steel plates of the outer formwork (1) are respectively separated from the outer wall of the poured concrete, completing the demoulding operation of the column mould shell (19);
tenth, after the demolding of the column formwork (19) is completed, the column formwork (19) is hoisted to the construction position through the formwork opening (18) on the column formwork (19), and then the pouring of the concrete inside the column formwork (19) is carried out.
9. The method for prefabricating a UHPC column formwork in accordance with claim 7, wherein the inner mould (13) in said third step is installed on the upper end face of the bottom mould (14), and the rotating shaft screw (11) and the inner mould movable door (12) in the supporting device on the inner wall of the inner mould (13) are perpendicular to the inner wall of the inner mould (13) to support the diameter of the inner wall of the inner mould (13) to the maximum.
10. A method for prefabricating a UHPC column formwork according to claim 7, wherein the distributor (8) in the seventh step is in the shape of an open funnel as a whole, the distributor (8) is composed of two ring-shaped members which are respectively installed on the top end surface of the inner die (13) and the top end surface of the outer die (1), the two ring-shaped members are connected through a triangular plate, the triangular plate is evenly distributed on the ring-shaped members, and the triangular plate is provided with through holes.
CN202111636676.6A 2021-12-29 2021-12-29 Prefabricating device and method for UHPC column formwork Active CN114227897B (en)

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CN114683395A (en) * 2022-04-18 2022-07-01 兰州理工大学 Modular circular PC well chamber prefabricated template and construction assembling and disassembling method
CN115229962A (en) * 2022-08-05 2022-10-25 成都鑫向恩建材有限公司 Demoulding and forming method of concrete prefabricated part

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