CN114939924A - Fiber reinforced composite material column permanent template sectional prefabricated mold and preparation method thereof - Google Patents

Fiber reinforced composite material column permanent template sectional prefabricated mold and preparation method thereof Download PDF

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Publication number
CN114939924A
CN114939924A CN202210589603.4A CN202210589603A CN114939924A CN 114939924 A CN114939924 A CN 114939924A CN 202210589603 A CN202210589603 A CN 202210589603A CN 114939924 A CN114939924 A CN 114939924A
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CN
China
Prior art keywords
mold
layer
outer layer
inner layer
pouring
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CN202210589603.4A
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Chinese (zh)
Inventor
冯然
侯林兵
邢锋
朱继华
许颖
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Shenzhen University
Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen University
Shenzhen Graduate School Harbin Institute of Technology
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Priority to CN202210589603.4A priority Critical patent/CN114939924A/en
Publication of CN114939924A publication Critical patent/CN114939924A/en
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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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • 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
    • B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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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 provides a fiber reinforced composite material column permanent template segmented prefabrication mold and a preparation method thereof, wherein the segmented prefabrication mold comprises a bottom plate, an inner layer mold, an outer layer mold, an inner layer pouring funnel, an outer layer pouring funnel and a fiber mesh fixing member for fixing a fiber mesh; the inner layer die comprises a bottom inner layer die and an upper inner layer die, and the outer layer die comprises a bottom outer layer die and an upper outer layer die; the inner diameter of the outer layer die is larger than the outer diameter of the inner layer die, the bottom inner layer die and the bottom outer layer die are both provided with connecting members, and the bottom plate is provided with a positioning groove for fixing fiber grids; the lower extreme that the inlayer was pour the funnel is equipped with the inlayer connecting piece that is used for being connected with inlayer mould, the lower extreme that the funnel was pour to the skin is equipped with the outer connecting piece that is used for being connected with outer mould. By adopting the technical scheme of the invention, the die is easy to install, and the problems of uneven fiber dispersion and incompact pouring in the cement-based composite material are solved.

Description

Fiber reinforced composite material column permanent template sectional prefabricated mold and preparation method thereof
Technical Field
The invention belongs to the technical field of preparation of permanent templates in building structures, and particularly relates to a fiber reinforced composite material column permanent template sectional prefabricated mold and a preparation method thereof.
Background
As a building structure with the advantages of high bearing capacity, large lateral stiffness, good overall performance and the like, the reinforced concrete structure is widely applied to buildings, bridges and marine structures. However, as the service life of the structure increases, the durability and the corrosion resistance of the reinforced concrete structure gradually decrease, resulting in a decrease in the strength and rigidity of the structure. Therefore, in order to repair the corroded and damaged members, various reinforcing technologies have been developed and researched by domestic and foreign scholars, wherein Fiber Reinforced Plastic (FRP) is a commonly used repairing means.
The FPR has the characteristics of high specific strength, good corrosion resistance, thermal expansion coefficient similar to that of concrete and the like, so that the FPR is widely applied to the field of reinforcing civil buildings, bridges, marine structures and the like, however, although the FRP material has the capability of resisting various environments in a short period of time, due to the complexity and diversity of practical application environments, and the FRP reinforcing structure is under the action of long-term load and severe environment, epoxy resin serving as a base material is easy to degrade due to high temperature or low temperature, so that the bonding force between the FRP material and the concrete is weakened, and the coordination working capability between the two materials is reduced. In addition, the reinforcing of the structure alone cannot prevent the further corrosion and aging of the reinforcing steel bars in the reinforced concrete, the bearing capacity and rigidity of the structure will continue to be reduced, and the problem of durability of the structure is not completely solved. The impressed current cathodic protection technology forms a closed circuit with the reinforcing steel bars through an external power supply and an auxiliary anode material, can effectively protect the reinforcing steel bars in the reinforced concrete from erosion of negative ions such as Cl & lt- & gt, and avoids further corrosion of the reinforcing steel bars. Therefore, the durability and the corrosion resistance of the reinforced concrete structure can be effectively improved by combining the structure reinforcing technology and the impressed current cathodic protection technology.
The above-mentioned problems of corrosion and durability of the steel reinforcement not only cause the strength and rigidity degradation of the built structure, but also are the design problems of the life-cycle of the newly built structure which need to be considered. In order to solve the problem of durability of the reinforced concrete structure from the root, a technology which can play a protective role when the building is in service needs to be developed and researched. Therefore, the invention discloses a prefabricated mould and a prefabricated method for a permanent template of a fiber reinforced cement-based composite material, wherein the fiber reinforced cement-based composite material can be used as a structural reinforcing material and also can be used as an auxiliary anode material for an impressed current cathodic protection technology. In addition, the use of the permanent template made of the fiber reinforced cement-based composite material can save the consumption of the template, the template and concrete form a combined structure after construction, the combined structure is stressed together, the effect of improving the durability of the structure can be played from the initial use stage of the structure, and the service life of the structure is prolonged.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a fiber reinforced composite material column permanent template segmented prefabricating mold and a preparation method thereof.
In contrast, the technical scheme adopted by the invention is as follows:
a fiber reinforced composite material column permanent template sectional prefabricating mould comprises a cement-based composite material hollow cylinder body positioned on an inner layer, a cement-based composite material hollow cylinder body positioned on an outer layer and a fiber grid positioned between the inner layer and the outer layer; further preferably, the fiber mesh is a carbon fiber mesh.
The fiber reinforced composite material column permanent template segmented prefabricating mold comprises a bottom plate, an inner layer mold, an outer layer mold, an inner layer pouring funnel, an outer layer pouring funnel and a plurality of fiber grid fixing members for fixing fiber grids; the inner layer die comprises a bottom inner layer die and an upper inner layer die connected with the bottom inner layer die, and the outer layer die comprises a bottom outer layer die and an upper outer layer die connected with the bottom outer layer die; the inner diameter of the outer layer die is larger than the outer diameter of the inner layer die, the bottom inner layer die and the bottom outer layer die are both provided with connecting members connected with a bottom plate, and the bottom plate is provided with a positioning groove for fixing a fiber grid; the lower extreme of inlayer funnel of pouring is equipped with the inlayer connecting piece that is used for being connected with bottom inlayer mould, upper portion inlayer mould, the lower extreme of outer funnel of pouring is equipped with the outer connecting piece that is used for being connected with bottom outer mould, upper portion outer mould.
As a further development of the invention, the upper inner mould is connected to the lower inner mould by means of inner nesting members and the upper outer mould is connected to the lower outer mould by means of outer nesting members.
As a further improvement of the invention, the inner nesting component is an inner sleeve, and the outer diameter of the inner sleeve is matched with the inner diameter of the inner layer die; the outer nesting component is an outer sleeve, and the inner diameter of the outer sleeve is matched with the outer diameter of the outer layer die. Namely, the outer diameter of the inner sleeve is consistent with the inner diameter of the inner layer die, and the upper inner layer die can be directly sleeved into the bottom inner layer die for connection; the inner diameter of the outer sleeve is consistent with the outer diameter of the outer layer mold, and the upper outer layer mold can be directly sleeved into the bottom outer layer mold for connection.
As a further improvement of the invention, the inner connecting piece is an inner funnel nesting part, and the inner diameter of the inner funnel nesting part is matched or consistent with the outer diameter of the inner mold; the outer-layer connecting piece is an outer-layer funnel nesting part, and the outer diameter of the outer-layer funnel nesting part is matched with or consistent with the inner diameter of the outer-layer mold. By adopting the technical scheme, the outer-layer pouring funnel can be directly nested at the upper end of the outer-layer die for installation; the same is true for the inner casting funnel.
As a further improvement of the invention, the inner layer pouring funnel is small at the upper end and large at the lower end, and the outer layer pouring funnel is large at the upper end and small at the lower end. That is, the outer diameter of the inner layer pouring funnel is gradually increased from the upper end to the lower end, and the inner diameter of the outer layer pouring funnel is gradually reduced from the upper end to the lower end.
As a further improvement of the invention, the width of the fiber grid fixing component is matched with the thickness of the cavity between the inner layer die and the outer layer die, and the middle part of the fiber grid fixing component is provided with a groove for fixing the fiber grid. The fiber grid fixing component is arranged between the inner layer die and the outer layer die and used for fixing the fiber grids.
As a further improvement of the invention, the number of the fiber mesh fixing members is at least four.
As a further improvement of the invention, the bottom plate is provided with a positioning hole connected with the connecting component.
As a further improvement of the invention, the positioning hole is internally provided with threads.
As a further improvement of the invention, the connecting member is connected with the positioning hole on the base through a bolt, and the bottom inner layer die and the bottom outer layer die are fixedly connected through the bolt, so that the installation is convenient.
As a further improvement of the present invention, the inner mold and the outer mold are hollow cylinders or hollow prisms.
As a further improvement of the invention, the inner mold and the outer mold are made of steel, PVC or acrylic materials and the like.
As a further improvement of the present invention, the upper inner layer mold and the upper outer layer mold are plural. By adopting the technical scheme, the upper inner layer die and the upper outer layer die of one layer are connected with the upper inner layer die and the upper outer layer die of the other layer, and then the cement-based composite material is poured, so that the height can be increased upwards.
The invention also discloses a preparation method of the fiber reinforced composite material column permanent template, which adopts any one of the fiber reinforced composite material column permanent template sectional prefabricated moulds to prepare and comprises the following steps:
step S1, fixing a bottom inner layer mold on a bottom plate, nesting the bottom outer layer mold outside the bottom outer layer mold and fixedly connecting the bottom outer layer mold with the bottom plate, embedding the bottom of a fiber grid into a positioning groove of the bottom plate, arranging a fiber grid fixing member between the bottom inner layer mold and the bottom outer layer mold and fixing the fiber grid, connecting an inner layer pouring funnel with the upper end of the bottom inner layer mold, connecting an outer layer pouring funnel with the upper end of the bottom outer layer mold, pouring a cement-based composite material into a cavity between the inner layer mold and the outer layer mold through the space between the inner layer pouring funnel and the outer layer pouring funnel, and pouring to prepare a first section permanent template;
step S2, removing the inner layer pouring funnel, the outer layer pouring funnel and the fiber grid fixing component, connecting the upper inner layer mold with the bottom inner layer mold, connecting the upper outer layer mold with the bottom outer layer mold, then connecting the inner layer pouring funnel and the outer layer pouring funnel with the upper ends of the upper inner layer mold and the upper outer layer mold respectively, pouring the cement-based composite material into a cavity between the inner layer mold and the outer layer mold through the inner layer pouring funnel and the outer layer pouring funnel, and pouring to manufacture a second section permanent template;
step S3, repeating the step S2 until the permanent formwork pouring of all the segments is completed;
and step S4, after the template is hardened, removing the bottom plate, the external mold and the internal mold, and naturally curing.
By adopting the technical scheme, the fiber grid is ensured to be positioned in the center of the cement-based composite material, the production requirements of the column permanent templates with different thicknesses and heights are met, the problems of uneven fiber dispersion and non-compact pouring in the cement-based composite material are solved, the fiber doped in the cement-based composite material is prevented from being suspended on the fiber grid, and the produced permanent template has good crack resistance, electric conduction and erosion resistance.
As a further improvement of the present invention, step S3 includes removing the inner pouring funnel, the outer pouring funnel and the fiber mesh fixing member, connecting the upper inner mold of the upper layer with the upper inner mold of the lower layer, connecting the upper outer mold of the upper layer with the upper outer mold of the lower layer, connecting the inner pouring funnel and the outer pouring funnel with the upper ends of the upper inner mold of the upper layer and the upper outer mold of the upper layer, respectively, pouring the cement-based composite material into the cavity between the inner mold and the outer mold through the space between the inner pouring funnel and the outer pouring funnel, and pouring to form the second section permanent mold; and finishing pouring the whole section of the permanent template of the fiber reinforced cement-based composite material column.
As a further improvement of the present invention, in step S1, when the bottom inner mold and the bottom outer mold are fixed, a layer of mold release agent is applied to the bottom plate, the outer wall of the bottom inner mold, and the inner wall of the bottom outer mold, and it is calibrated whether the bottom inner mold and the bottom outer mold are concentric.
As a further improvement of the invention, in step S2, a layer of release agent is coated on the outer wall of the upper inner layer mold and the inner wall of the upper outer layer mold,
as a further improvement of the invention, in the step S1 and the step S2, when the cement-based composite material is poured, the inner side and the outer side of the fiber grid are simultaneously poured, and vibration is simultaneously carried out, so that the slurry is uniformly distributed and the fiber grid is always positioned in the middle.
As a further improvement of the present invention, in steps S1 and S2, the fiber mesh fixing members are disposed at equal intervals between the bottom inner mold and the bottom outer mold, and between the upper inner mold and the upper outer mold.
As a further improvement of the invention, when the upper layer inner layer die and the upper layer outer layer die are nested on the bottom layer inner layer die and the bottom layer outer layer die, the residual cement-based composite material at the upper ends of the bottom layer inner layer die and the bottom layer outer layer die is cleaned, so that the slurry leakage phenomenon between the upper die and the lower die is avoided. Similarly, when the next upper layer inner layer die and the next upper layer outer layer die are embedded with the one upper layer inner layer die and the one upper layer outer layer die, the residual cement-based composite material at the upper ends of the next upper layer inner layer die and the next lower layer outer layer die is cleaned.
As a further improvement of the invention, one or more fibers (carbon fibers, PVA fibers, PP fibers and PE fibers) are doped in the cement-based composite material so as to enhance the crack resistance, the electric conduction and the mechanical property of the cement-based composite material.
As a further improvement of the invention, the fiber grid is bent into a cylinder shape according to requirements, comprises a certain overlap length, and is bonded by epoxy resin or bound by thin iron wires.
As a further improvement of the present invention, in step S4, after the pouring of the permanent formwork of the fiber reinforced cement-based composite column of all sections is completed, the cement-based pouring funnel is removed, the plastic film is covered, the inner and outer layer molds are removed after the curing for a certain time, and the prefabricated permanent formwork of the fiber reinforced cement-based composite column is obtained after the curing for 28 days.
Compared with the prior art, the invention has the beneficial effects that:
firstly, by adopting the technical scheme of the invention, the production requirements of the column permanent templates with different thicknesses and heights can be met, the prepared permanent template has good mechanical property, conductivity, crack resistance and durability, meanwhile, the template consumption can be saved, the permanent template and the internal concrete form a combined structure after construction, the combined structure is stressed together, the structure durability can be improved from the initial stage of the structure use, the service life of the structure is prolonged, the problems of uneven fiber dispersion and non-compact pouring in the cement-based composite material are solved, the problem that the fibers doped in the cement-based composite material are hung on a fiber grid is avoided, and the produced permanent template has good crack resistance, conductivity and erosion resistance.
Secondly, the template of the technical scheme of the invention solves the durability problem of the reinforced concrete structure from the root, and the fiber reinforced cement-based composite material permanent template can be used as a structural external reinforcing material and also can be used as an auxiliary anode material of an impressed current cathodic protection technology. In addition, the use of the permanent template made of the fiber reinforced cement-based composite material can save the consumption of the template, the template and concrete form a combined structure after construction, the combined structure is stressed together, the effect of improving the durability of the structure can be played from the initial use stage of the structure, and the service life of the structure is prolonged.
Thirdly, by adopting the template preparation scheme of the technical scheme of the invention, the problems of uneven fiber dispersion and incompact pouring are solved, and the produced permanent template has better crack resistance, electric conduction and erosion resistance and wider application range; the prefabricated mould processing is comparatively simple and easy with the installation, and the cost of manufacture is low, and it is high-efficient to pour the production, and product quality is controllable, can satisfy the production demand of the permanent template of post of different thickness and height, has effectively solved cement-based composite and has pour the problem of incompact and fibre net location.
Drawings
Fig. 1 is a schematic structural view of a permanent formwork for a fiber cement-based composite column according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a bottom mold and an upper mold combined according to an embodiment of the present invention.
FIG. 3 is a top view of the bottom mold in combination with the upper mold of an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a base plate according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a bottom inner layer mold according to an embodiment of the invention.
Fig. 6 is a schematic structural view of a bottom outer layer mold according to an embodiment of the invention.
Fig. 7 is a schematic structural view of an upper inner mold according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of an upper outer mold according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an inner cement-based composite pouring funnel according to an embodiment of the invention.
Fig. 10 is a schematic structural diagram of an outer cement-based composite material pouring funnel according to an embodiment of the invention.
FIG. 11 is a fiber mesh mounting stirrup according to an embodiment of the present invention.
Fig. 12 is a schematic view of the bottom section permanent form when casting according to an embodiment of the present invention.
FIG. 13 is a top view of a bottom section permanent form as cast in accordance with an embodiment of the present invention.
Fig. 14 is a schematic view of the upper section permanent form when cast according to an embodiment of the present invention.
Fig. 15 is a top view of an upper section permanent form as cast in accordance with an embodiment of the present invention.
The reference numerals include:
1-inner layer cement-based composite material hollow column, 2-outer layer cement-based composite material hollow column and 3-fiber grid;
11-bottom plate, 12-bottom inner layer mold, 13-bottom outer layer mold, 14-upper inner layer mold, 15-upper outer layer mold, 16-fiber grid fixing member, 17-inner layer pouring funnel and 18-outer layer pouring funnel;
21-a first positioning hole, 22-an annular groove, 23-a second positioning hole, 24-a first connecting angle steel, 25-a bolt, 26-a second connecting angle steel, 27-a nested outer pipe, 28-a nested inner pipe, 29-an outer layer nested connecting pipe and 30-an inner layer nested connecting pipe.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
As shown in fig. 1, a fiber reinforced cement-based composite cylindrical permanent formwork comprises an inner layer cement-based composite hollow cylinder 1, a cylindrical fiber grid 2 and an outer layer cement-based composite hollow cylinder 3, wherein the fiber grid 2 is located at a joint between the inner layer cement-based composite hollow cylinder 1 and the outer layer cement-based composite hollow cylinder 3. Further, the fiber mesh 2 is a carbon fiber mesh.
As shown in fig. 2 to 11, the sectional prefabricated mold of the fiber reinforced cement-based composite material cylindrical permanent formwork comprises a bottom plate 11, a bottom inner layer mold 12, a bottom outer layer mold 13, an upper inner layer mold 14, an upper outer layer mold 15, a fiber mesh fixing stirrup 16, an inner layer pouring funnel 17 and an outer layer pouring funnel 18; the main bodies of the bottom inner layer die 12, the bottom outer layer die 13, the upper inner layer die 14 and the upper outer layer die 15 are all hollow cylinders, and the inner diameters of the bottom outer layer die 13 and the upper outer layer die 15 are larger than the outer diameters of the bottom inner layer die 12 and the upper inner layer die 14.
As shown in fig. 4, the bottom plate 11 is provided with a first positioning hole 21 for fixing the bottom outer layer mold 13, a positioning groove 22 for fixing the fiber mesh 2, and a second positioning hole 23 for fixing the bottom inner layer mold 12, wherein both the first positioning hole 21 and the second positioning hole 23 are provided with threads, the bottom inner layer mold 12 and the bottom outer layer mold 13 can be fixed on the bottom plate 11 by bolts, and it can be ensured that the bottom inner layer mold 12 and the bottom outer layer mold 13 are concentric, and the thicknesses of the formed cavities in all directions are consistent.
As shown in fig. 5 and 6, 4 second connecting angle steels 26 are arranged inside the bottom inner layer mold 12, and 4 first connecting angle steels 24 are arranged outside the bottom outer layer mold 13; the first connecting angle steel 24 and the second connecting angle steel 26 are fixed with the bottom inner layer die 12 and the bottom outer layer die 13 in a welding mode; round holes consistent with the diameters of the first positioning hole 21 and the second positioning hole 23 are formed in the first connecting angle steel 24 and the second connecting angle steel 26, and bolts 25 can be used for connecting with the first positioning hole 21 and the second positioning hole 23 of the bottom plate 11.
As shown in fig. 7, the bottom end of the upper inner mold 14 is provided with a nested inner tube 28 connected to the bottom inner mold 12; the outer diameter of the nested inner tube 28 is consistent with the inner diameter of the bottom inner layer die 12 and the upper inner layer die 14; the nested inner tubes 28 are connected to the upper inner mold 14 by welding or bonding and have a certain overlap length.
As shown in fig. 8, the bottom end of the upper outer mold 15 is provided with a nested outer tube 27 connected with the bottom outer mold 13; the inner diameter of the nested outer pipe 27 is consistent with the inner diameters of the bottom outer layer die 13 and the upper outer layer die 15; the nested outer tube 27 is connected to the upper outer mold 15 by welding or bonding and has a certain overlap length.
As shown in fig. 9, the bottom end of the inner pouring funnel 17 is provided with an inner nested connecting pipe 30 connected with the bottom inner mold 12 and the upper inner mold 14; the diameter of the inner-layer pouring funnel 17 is gradually reduced from bottom to top from the top end of the inner-layer nested connecting pipe 30, so that the inner-layer cement-based composite material can be conveniently poured; the inner diameter of the inner-layer nested connecting pipe 30 is consistent with the outer diameters of the bottom inner-layer mold 12 and the upper inner-layer mold 14; the inner cement-based composite material pouring funnel 17 can be manufactured in an integrated manner, or the inner nested connecting pipe 30 and the upper funnel are manufactured respectively and then connected into a whole.
As shown in fig. 10, the bottom end of the outer pouring funnel 18 is provided with an outer nested connecting pipe 29 connected with the bottom outer mold 13 and the upper outer mold 15; the diameter of the outer-layer pouring funnel 18 is gradually increased from bottom to top from the top end of the outer-layer nested connecting pipe 29, so that the outer-layer cement-based composite material can be poured conveniently; the outer diameter of the outer-layer nested connecting pipe 29 is consistent with the inner diameters of the bottom outer-layer die 13 and the upper outer-layer die 15; the outer pour funnel 18 may be formed as a single piece or the outer nesting connection tube 29 and the upper funnel may be formed separately and then joined as a single piece.
As shown in fig. 11, the width of the fiber mesh fixing member 16 is the same as the thickness of the cavity between the bottom inner mold 12 or the upper inner mold 14, and the bottom outer mold 13 or the upper outer mold 15, a groove for fixing the fiber mesh is provided in the middle of the fiber mesh fixing member 16, and the width of the groove is the same as the thickness of the fiber mesh.
The pouring mold combination of the fiber reinforced cement-based composite column permanent formwork of the bottom section is shown in fig. 12 and 13. The bottom inner layer mold 12 and the bottom outer layer mold 13 are fixedly connected with the bottom plate 11 through first connecting angle steel 24 and second connecting angle steel 26, the fiber grids 2 are fixed in the annular groove 22 in the bottom plate 11, and the inner layer cement-based composite material pouring funnel 17 and the outer layer cement-based composite material pouring funnel 18 are nested into the bottom inner layer mold 12 and the bottom outer layer mold 13; and then pouring the cement-based composite material, and pouring the inner layer and the outer layer simultaneously while vibrating.
The pouring mold combination of the permanent template of the fiber reinforced cement-based composite column of the upper segment is shown in fig. 14 and 15. On the basis of fig. 12 and 13, removing the inner layer pouring funnel 17 and the outer layer pouring funnel 18, and sleeving the upper inner layer mold 14 and the upper outer layer mold 15 on the upper ends of the bottom inner layer mold 12 and the bottom outer layer mold 13; nesting an inner layer pouring funnel 17 and an outer layer pouring funnel 18 on an upper inner layer die 14 and an upper outer layer die 15; and then pouring the cement-based composite material, and pouring the inner layer and the outer layer simultaneously while vibrating.
The method for preparing the prefabricated pipe by adopting the fiber reinforced cement-based composite material comprises the following steps:
(1) the flaky fiber grid is bent into a cylinder with a required diameter, a certain lap joint length is reserved, and epoxy resin bonding or thin iron wire binding molding is adopted.
(2) And (3) coating release agents on the upper surface of the bottom plate, the outer surface of the bottom inner layer die and the inner surface of the bottom outer layer die.
(3) The bottom inner layer die is fixedly connected with the bottom plate through the connecting angle steel, then the cylindrical fiber grids are fixedly embedded in the grooves of the bottom plate, the cylindrical fiber grids and the inner layer die are guaranteed to be on the same circle center, and finally the bottom outer layer die is fixedly connected with the bottom plate through the connecting angle steel, and the bottom inner layer die and the bottom outer layer die are guaranteed to be on the same circle center.
(4) Install fibre net fixed component in the cavity between the inside and outside layer mould in bottom, arrange 4 along the hoop equidistance to with fibre net build in the recess in the middle of the fixed component, prevent to pour the in-process, fibre net's position takes place the skew.
(5) And installing the inner-layer pouring funnel and the outer-layer pouring funnel at the upper ends of the inner-layer die and the outer-layer die at the bottom, and forcibly compressing to prevent the pouring funnel from inclining in the pouring process.
(6) Pouring the cement-based composite material between the inner funnel and the outer funnel to ensure that the cement-based composite material on the inner side and the outer side is poured simultaneously, using a vibrating rod to vibrate and compact in the pouring process, and ensuring that the fiber grids are always kept in the center in the pouring process.
(7) After the bottom section permanent template is poured, the inner layer pouring funnel and the outer layer pouring funnel and the fiber grid fixing component are detached, residual cement bases on the upper surface of the bottom mold are cleaned up by using wet cleaning cloth, and then the release agent is coated on the outer surface of the upper inner layer mold and the inner surface of the upper outer layer mold.
(8) Connecting the upper inner layer mold and the upper outer layer mold to the upper ends of the bottom inner layer mold and the bottom outer layer mold in an embedded manner, and pressing with force; then, installing the fiber mesh fixing members in a cavity between the inner layer die and the outer layer die at the upper part, arranging 4 fiber mesh fixing members at equal intervals along the annular direction, and embedding the fiber mesh fixing members in a groove in the middle of the fixing members; and finally, installing the inner-layer pouring funnel and the outer-layer pouring funnel at the upper ends of the inner-layer die and the outer-layer die on the upper parts, and tightly pressing the inner-layer pouring funnel and the outer-layer pouring funnel with force to prevent the pouring funnel from inclining in the pouring process.
(9) Pouring the cement-based composite material between the inner funnel and the outer funnel to ensure that the cement-based composite material on the inner side and the outer side is poured simultaneously, and using a vibrating rod to vibrate and compact in the pouring process to ensure that the fiber grids are always kept in the center position in the pouring process.
(10) And (5) repeating the steps (7) to (9) until the pouring of the required permanent formwork of the column is completed.
(11) And (3) sticking a preservative film on the test piece, placing the test piece in a cool and indoor place for hardening, sequentially removing the molds at the bottom and all the upper parts after 48 hours, covering the component with the preservative film, and naturally curing for 28 days to finish the manufacture of the permanent template.
(12) And cleaning the removed bottom plate, the pouring funnel and the inner and outer layer molds for reuse.
By adopting the technical scheme of the embodiment, the problems of difficult pouring, uneven and compact pouring and fiber agglomeration in the cement-based composite material caused by small thickness and large height are solved, and the limitation of the thickness and the height of the permanent template of the fiber reinforced cement-based composite material column is broken through; the fiber grids can be ensured to be positioned at the preset position of the permanent template of the column, and the dispersion uniformity of the fibers in the cement-based composite material is improved. In the embodiment, the fiber grids and the inner and outer cement-based composite materials are constructed and maintained together, and the problem that the interface between the new cement base and the old cement base is weak due to the fact that the inner and outer cement bases are poured successively is avoided, so that the permanent template for the fiber reinforced cement-based composite material column has better internal bonding performance, crack resistance and integral coordination working capacity. The sectional prefabricated mold of the permanent template of the fiber reinforced cement-based composite material column is easy to install and disassemble, high in pouring production efficiency, controllable in product quality, low in production cost, capable of being recycled, energy-saving and environment-friendly, capable of meeting the production requirements of the permanent templates of columns with different thicknesses and heights, and convenient to popularize and use on a large scale.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. The utility model provides a permanent template segmentation prefabrication mould of fibre reinforced composite post which characterized in that: the permanent template of the fiber reinforced composite material column comprises a cement-based composite material hollow column body positioned on an inner layer, a cement-based composite material hollow column body positioned on an outer layer and a fiber grid positioned between the inner layer and the outer layer;
the fiber reinforced composite material column permanent template segmented prefabricating mold comprises a bottom plate, an inner layer mold, an outer layer mold, an inner layer pouring funnel, an outer layer pouring funnel and a plurality of fiber grid fixing members for fixing fiber grids; the inner layer mold comprises a bottom inner layer mold and an upper inner layer mold, and the outer layer mold comprises a bottom outer layer mold and an upper outer layer mold; the inner diameter of the outer layer die is larger than the outer diameter of the inner layer die, the bottom inner layer die and the bottom outer layer die are both provided with connecting members connected with a bottom plate, and the bottom plate is provided with a positioning groove for fixing a fiber grid; the lower end of the inner layer pouring funnel is provided with an inner layer connecting piece used for being connected with the bottom inner layer die and the upper inner layer die, and the lower end of the outer layer pouring funnel is provided with an outer layer connecting piece used for being connected with the bottom outer layer die and the upper outer layer die;
the inner layer pouring funnel is small in upper end and large in lower end, and the outer layer pouring funnel is large in upper end and small in lower end.
2. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 1, wherein: the upper inner layer die is connected with the bottom inner layer die through an inner nesting component, and the upper outer layer die is connected with the bottom outer layer die through an outer nesting component.
3. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 2, wherein: the inner nested component is an inner sleeve, and the outer diameter of the inner sleeve is matched with the inner diameter of the inner-layer die; the outer nesting component is an outer sleeve, and the inner diameter of the outer sleeve is matched with the outer diameter of the outer layer die.
4. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 1, wherein: the inner-layer connecting piece is an inner-layer funnel nesting part, and the inner diameter of the inner-layer funnel nesting part is matched with the outer diameter of the inner-layer die; the outer-layer connecting piece is an outer-layer funnel nesting part, and the outer diameter of the outer-layer funnel nesting part is matched with the inner diameter of the outer-layer mold.
5. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 4, wherein: the width of the fiber grid fixing component is matched with the thickness of the cavity between the inner layer die and the outer layer die, and the middle of the fiber grid fixing component is provided with a groove for fixing the fiber grid.
6. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 5, wherein: the fiber grid fixing members are at least four.
7. The fiber reinforced composite column permanent template segmental prefabricating mold as claimed in any one of claims 1 to 6, wherein: the bottom plate is provided with a positioning hole connected with the connecting member.
8. A preparation method of a fiber reinforced composite material column permanent template is characterized by comprising the following steps: the fiber reinforced composite column permanent template segmented prefabrication mold is prepared by adopting the fiber reinforced composite column permanent template segmented prefabrication mold according to any one of claims 1 to 7, and comprises the following steps:
step S1, fixing a bottom inner layer mold on a bottom plate, nesting the bottom outer layer mold outside the bottom outer layer mold and fixedly connecting the bottom outer layer mold with the bottom plate, embedding the bottom of a fiber grid into a positioning groove of the bottom plate, arranging a fiber grid fixing member between the bottom inner layer mold and the bottom outer layer mold and fixing the fiber grid, connecting an inner layer pouring funnel with the upper end of the bottom inner layer mold, connecting an outer layer pouring funnel with the upper end of the bottom outer layer mold, pouring a cement-based composite material into a cavity between the inner layer mold and the outer layer mold through the space between the inner layer pouring funnel and the outer layer pouring funnel, and pouring to prepare a first section permanent template;
step S2, removing the inner layer pouring funnel, the outer layer pouring funnel and the fiber grid fixing component, connecting the upper inner layer mold with the bottom inner layer mold, connecting the upper outer layer mold with the bottom outer layer mold, connecting the inner layer pouring funnel and the outer layer pouring funnel with the upper ends of the upper inner layer mold and the upper outer layer mold respectively, pouring the cement-based composite material into a cavity between the inner layer mold and the outer layer mold through the inner layer pouring funnel and the outer layer pouring funnel, and pouring to manufacture a second section permanent template;
step S3, repeating the step S2 until the permanent formwork pouring of all the segments is completed;
and step S4, after the template is hardened, removing the bottom plate, the external mold and the internal mold, and naturally curing.
9. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 8, wherein: step S3 includes removing the inner layer pouring funnel, the outer layer pouring funnel and the fiber mesh fixing component, connecting the upper inner layer mold of the upper layer with the upper inner layer mold of the lower layer, connecting the upper outer layer mold of the upper layer with the upper outer layer mold of the lower layer, connecting the inner layer pouring funnel and the outer layer pouring funnel with the upper ends of the upper inner layer mold of the upper layer and the upper outer layer mold of the upper layer respectively, pouring the cement-based composite material into a cavity between the inner layer pouring funnel and the outer layer pouring funnel, and pouring to manufacture a second section permanent template; and (4) until the pouring of the permanent template of the whole section of the fiber reinforced cement-based composite material column is completed.
10. The fiber reinforced composite column permanent formwork sectional prefabrication mold of claim 1, wherein: in step S1, when the bottom inner layer mold and the bottom outer layer mold are fixed, a layer of release agent is coated on the bottom plate, the outer wall of the bottom inner layer mold, and the inner wall of the bottom outer layer mold, and whether the bottom inner layer mold and the bottom outer layer mold are concentric is calibrated;
in step S2, a layer of release agent is coated on the outer wall of the upper inner layer mold and the inner wall of the upper outer layer mold;
in steps S1 and S2, the fiber mesh fixing members are arranged at equal intervals between the bottom inner layer mold and the bottom outer layer mold, and between the upper inner layer mold and the upper outer layer mold; when the cement-based composite material is poured, the inner side and the outer side of the fiber grid are simultaneously poured and vibrated at the same time, so that the slurry is uniformly distributed in a closed chamber, and the fiber grid is positioned in the middle; when the bottom layer is nested in the second layer of mould, the residual cement-based composite material at the upper end of the first layer of mould is cleaned.
CN202210589603.4A 2022-05-27 2022-05-27 Fiber reinforced composite material column permanent template sectional prefabricated mold and preparation method thereof Pending CN114939924A (en)

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CN85204221U (en) * 1985-10-07 1986-09-24 邵阳市市政工程公司 Steel die set for tamping concrete fabricated pipe
CN1083885A (en) * 1992-08-14 1994-03-16 特龙国际建筑技术有限公司 The spanning of building the method for spanning and building thus
AU1760695A (en) * 1994-05-20 1995-11-30 Waffle-Crete International, Inc. Concrete panel construction and mold
CN1545589A (en) * 2001-02-13 2004-11-10 W Glass concrete composite panel
CN102941622A (en) * 2012-11-16 2013-02-27 祁锦明 Centrifugal forming die and construction method for high-strength conical cement pole
CN106049759A (en) * 2016-07-29 2016-10-26 华南理工大学 Cylindrical ultra-high performance concrete permanent formwork and preparation method thereof
CN108590164A (en) * 2018-05-07 2018-09-28 中国矿业大学 A kind of TRC is collapsible can assembled permanent formwork and preparation method thereof
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85204221U (en) * 1985-10-07 1986-09-24 邵阳市市政工程公司 Steel die set for tamping concrete fabricated pipe
CN1083885A (en) * 1992-08-14 1994-03-16 特龙国际建筑技术有限公司 The spanning of building the method for spanning and building thus
AU1760695A (en) * 1994-05-20 1995-11-30 Waffle-Crete International, Inc. Concrete panel construction and mold
CN1545589A (en) * 2001-02-13 2004-11-10 W Glass concrete composite panel
CN102941622A (en) * 2012-11-16 2013-02-27 祁锦明 Centrifugal forming die and construction method for high-strength conical cement pole
CN106049759A (en) * 2016-07-29 2016-10-26 华南理工大学 Cylindrical ultra-high performance concrete permanent formwork and preparation method thereof
CN108590164A (en) * 2018-05-07 2018-09-28 中国矿业大学 A kind of TRC is collapsible can assembled permanent formwork and preparation method thereof
CN213732497U (en) * 2020-08-25 2021-07-20 广东丰业电力器材有限公司 Prevent running thick liquid wire pole mould device

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