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

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 formwork segmented prefabricated mold and preparation method thereof

technical field

The invention belongs to the technical field of preparation of permanent formwork in building structures, and in particular relates to a segmented prefabricated mould for a permanent formwork of a fiber reinforced composite material column and a preparation method thereof.

Background technique

As a building structure with the advantages of high bearing capacity, high lateral stiffness and good overall performance, reinforced concrete structures are widely used in buildings, bridges and marine structures. However, as the age of the structure increases, the durability and corrosion resistance of reinforced concrete structures gradually decline, resulting in a consequent reduction in the strength and stiffness of the structure. Therefore, in order to repair the components damaged by corrosion, domestic and foreign scholars have developed and researched various reinforcement technologies, among which the fiber reinforced plastic (FRP) is a more commonly used repair method.

FPR is widely used in the reinforcement of civil buildings, bridges and marine structures due to its high specific strength, good corrosion resistance and thermal expansion coefficient similar to concrete. However, due to the complexity and diversity of the actual application environment, and the FRP-reinforced structure will be under the action of long-term load and harsh environment, its matrix material epoxy resin is easily degraded due to high temperature or low temperature, resulting in FRP material and concrete. The bonding force between the two materials is weakened, which reduces the coordination ability between the two materials. In addition, the structural reinforcement alone cannot prevent the further corrosion and aging of the steel bars inside the reinforced concrete, the bearing capacity and stiffness of the structure will continue to decrease, and the durability problem of the structure has not been completely solved. The impressed current cathodic protection technology forms a closed circuit with the steel bar through the external power supply and auxiliary anode material, which can effectively protect the steel bar in the reinforced concrete from the corrosion of Cl- plasma negative ions, and avoid further corrosion of the steel bar. Therefore, the combined use of structural reinforcement technology and impressed current cathodic protection technology can effectively improve the durability and corrosion resistance of reinforced concrete structures.

The above steel corrosion and durability problems not only cause the degradation of the strength and stiffness of the existing structure, but also are the design problems of the whole life cycle that need to be considered for the new structure. In order to solve the durability problem of reinforced concrete structures from the root, it is necessary to develop a technology that plays a protective role from the time the building is put into service. Therefore, the present invention discloses a prefabricated mold and a prefabrication method for a permanent formwork of a fiber-reinforced cement-based composite material, wherein the fiber-reinforced cement-based composite material can be used as both a structural reinforcement material and an auxiliary anode material for impressed current cathodic protection technology. In addition, the use of fiber-reinforced cement-based composite permanent formwork can save formwork consumption. After construction, it can form a composite structure with concrete and bear the force together. It can improve the durability of the structure from the early stage of use and increase the overall durability of the structure. life cycle.

SUMMARY OF THE INVENTION

In view of the above technical problems, the present invention discloses a segmented prefabricated mold for fiber-reinforced composite material column permanent formwork and a preparation method thereof. and fiber mesh positioning problems.

To this, the technical scheme adopted in the present invention is:

A fiber reinforced composite material column permanent formwork segmented prefabricated mold, the fiber reinforced composite material column permanent formwork comprises a cement-based composite hollow cylinder located in an inner layer, a cement-based composite hollow cylinder located in an outer layer, and a cement-based composite hollow cylinder located in the inner layer. The fiber mesh between the layer and the outer layer; further preferably, the fiber mesh is a carbon fiber mesh.

The fiber reinforced composite material column permanent formwork segmented prefabricated mold includes a base 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 the fiber grid; The inner layer mold includes a bottom inner layer mold, an upper inner layer mold connected with the bottom inner layer mold, and the outer layer mold includes a bottom outer layer mold and an upper outer layer mold connected with the bottom outer layer mold; the outer layer mold The inner diameter is larger than the outer diameter of the inner layer mold, the bottom inner layer mold and the bottom outer layer mold are both provided with connecting members connected to the bottom plate, and the bottom plate is provided with a positioning groove for fixing the fiber mesh; The lower end of the layer pouring funnel is provided with an inner layer connector for connecting with the bottom inner layer mold and the upper inner layer mold, and the lower end of the outer layer pouring funnel is provided with an outer layer for connecting with the bottom outer layer mold and the upper outer layer mold. connector.

As a further improvement of the present invention, the upper inner layer mold is connected to the bottom inner layer mold through an inner nesting member, and the upper outer layer mold is connected to the bottom outer layer mold through an outer nesting member.

As a further improvement of the present invention, the inner nested member is an inner sleeve, and the outer diameter of the inner sleeve matches the inner diameter of the inner layer mold; the outer nested member is an outer sleeve, and the inner diameter of the outer sleeve is Match the outer diameter of the outer mold. That is to say, the outer diameter of the inner sleeve is consistent with the inner diameter of the inner mold, and the upper inner mold can be directly inserted into the bottom inner mold for connection; the inner diameter of the outer sleeve is consistent with the outer diameter of the outer mold, and the upper inner mold can be directly inserted The outer layer mold is directly sleeved into the bottom outer layer mold for connection.

As a further improvement of the present invention, the inner layer connector is an inner layer funnel nested component, and the inner diameter of the inner layer funnel nested component matches or is consistent with the outer diameter of the inner layer mold; the outer layer connector is an outer layer of the funnel. A layer of funnel nested parts, the outer diameter of the outer layer of funnel nested parts is matched or consistent with the inner diameter of the outer layer mold. With this technical solution, the outer layer pouring funnel can be directly nested on the upper end of the outer layer mold for installation; the same is true for the inner layer pouring funnel.

As a further improvement of the present invention, the inner layer pouring funnel has a small upper end and a large lower end, and the outer layer pouring funnel has a large upper end and a small lower end. That is, the outer diameter of the inner layer pouring funnel increases gradually from the upper end to the lower end, while the inner diameter of the outer layer pouring funnel gradually decreases from the upper end to the lower end.

As a further improvement of the present invention, the width of the fiber mesh fixing member matches the thickness of the cavity between the inner layer mold and the outer layer mold, and the middle part of the fiber mesh fixing member is provided with a concave for fixing the fiber mesh. groove. Wherein, the fiber mesh fixing member is used to be arranged between the inner and outer layer molds to fix the fiber mesh.

As a further improvement of the present invention, there are at least four fiber mesh fixing members.

As a further improvement of the present invention, the bottom plate is provided with a positioning hole connected with the connecting member.

As a further improvement of the present invention, a thread is provided inside the positioning hole.

As a further improvement of the present invention, the connecting member is connected with the positioning hole on the base through bolts, and the bottom inner layer mold and the bottom outer layer mold are fixed by bolt connection, which is convenient for installation.

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 present invention, the inner mold and the outer mold are made of materials such as steel, PVC or acrylic.

As a further improvement of the present invention, there are multiple upper inner layer molds and upper outer layer molds. With this technical scheme, the upper inner layer mold and the upper outer layer mold of one layer are connected with the other upper inner layer mold and the upper outer layer mold, and then the cement-based composite material is poured, which can be raised upward.

The invention also discloses a preparation method of the permanent template of the fiber reinforced composite material column, which adopts the segmented prefabricated mold of the permanent template of the fiber reinforced composite material column as described in any one of the above to prepare, which comprises the following steps:

Step S1, the bottom inner layer mold is fixed on the bottom plate, the bottom outer layer mold is nested outside the bottom outer layer mold, and is fixedly connected with the bottom plate, the bottom of the fiber mesh is embedded in the positioning groove of the bottom plate, and the fiber mesh The grid fixing member is arranged between the bottom inner layer mold and the bottom outer layer mold, and fixes the fiber mesh, connects the inner layer pouring funnel with the upper end of the bottom inner layer mold, and connects the outer layer pouring funnel with the bottom outer layer mold. , pour the cement-based composite material into the cavity between the inner and outer molds through the inner pouring funnel and the outer pouring funnel, and pour the first segment permanent formwork;

Step S2, remove the inner layer pouring funnel, the outer layer pouring funnel and the fiber mesh fixing member, connect the upper inner layer mold with the bottom inner layer mold, connect the upper outer layer mold with the bottom outer layer mold, and then connect the inner layer pouring funnel , The outer layer pouring funnel is respectively connected with the upper end of the upper inner layer mold and the upper outer layer mold, and the cement-based composite material is poured into the cavity between the inner layer and the outer layer mold through the inner layer pouring funnel and the outer layer pouring funnel. , pouring to make the second segment permanent formwork;

Step S3, repeat step S2 until the permanent formwork pouring of all segments is completed;

In step S4, after the template is hardened, the bottom plate, the outer mold, and the inner mold are removed for natural maintenance.

The adoption of this technical solution ensures that the fiber grid is located in the center of the cement-based composite material, meets the production requirements of permanent formwork for columns with different thicknesses and heights, and solves the problems of uneven fiber dispersion and poor pouring in the cement-based composite material. The fiber doped in the cement-based composite material is avoided to hang on the fiber grid, and the permanent template produced has good crack resistance, electrical conductivity and corrosion resistance.

As a further improvement of the present invention, step S3 includes removing the inner layer pouring funnel, the outer layer pouring funnel and the fiber mesh fixing member, connecting the upper inner layer mold of the upper layer with the upper inner layer mold of the next layer, and connecting the upper inner layer mold of the upper layer to the upper inner layer mold of the lower layer. The upper outer layer mold of one layer is connected with the upper outer layer mold of the next layer, and then the inner layer pouring funnel and the outer layer pouring funnel are respectively connected with the upper inner layer mold of the upper layer and the upper end of the upper outer layer mold of the upper layer. Connect, pour the cement-based composite material into the cavity between the inner and outer molds through the inner pouring funnel and the outer pouring funnel, and pour the second section of permanent formwork; until the entire section of fiber-reinforced cement-based composite Material column permanent formwork pouring completed.

As a further improvement of the present invention, in step S1, when fixing the bottom inner layer mold and the bottom outer layer mold, apply a layer of release agent on the bottom plate, the outer wall of the bottom inner layer mold, and the inner wall of the bottom outer layer mold, and calibrate the bottom inner layer mold. Whether the layer mold and the bottom outer mold are concentric.

As a further improvement of the present invention, in step S2, a layer of release agent is applied to 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 present invention, in steps S1 and S2, when pouring the cement-based composite material, the inside and outside of the fiber mesh are poured at the same time, and vibrated at the same time to ensure that the slurry is evenly distributed in the chamber and the fiber mesh is always in the middle position .

As a further improvement of the present invention, 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.

As a further improvement of the present invention, when the bottom inner layer mold and the bottom layer outer layer mold are nested with the upper layer inner layer mold and the upper layer outer layer mold, the cement-based composite material remaining at the upper ends of the bottom layer inner layer mold and the bottom layer outer layer mold is cleaned. Clean to avoid slurry leakage between the upper and lower molds. Similarly, when the upper inner layer mold and the upper outer layer mold of the next layer are nested with the upper inner layer mold and the upper outer layer mold, the cement-based composite material remaining at the upper end of the lower inner layer mold and the bottom outer layer mold is inserted into the upper layer. Clean up.

As a further improvement of the present invention, the cement-based composite material is doped with one or more fibers (carbon fiber, PVA fiber, PP fiber, PE fiber) to enhance the crack resistance, electrical conductivity and mechanical properties of the cement-based composite material.

As a further improvement of the present invention, the fiber grid is bent into a cylindrical shape according to requirements, contains a certain overlapping length, and is bonded with epoxy resin or bound with thin iron wires.

As a further improvement of the present invention, in step S4, after completing the pouring of the permanent formwork for all segments of the fiber-reinforced cement-based composite material column, remove the cement-based pouring funnel, cover it with a plastic film, and after curing for a certain period of time, remove the inner and outer layer molds, After curing again for 28 days, the prefabricated permanent formwork of the fiber-reinforced cement-based composite material column was obtained.

Compared with the prior art, the beneficial effects of the present invention are:

First, by adopting the technical solution of the present invention, the production requirements of column permanent templates of different thicknesses and heights can be met, and the prepared permanent templates have good mechanical properties, electrical conductivity, crack resistance and durability, and can save template consumption at the same time. After the construction is completed, it will form a composite structure with the internal concrete and bear the force together. From the early stage of the structure, the durability of the structure can be improved, and the life cycle of the structure can be increased. The problem is that the fibers doped in the cement-based composite material are prevented from hanging on the fiber grid, and the permanent template produced has good crack resistance, electrical conductivity and corrosion resistance.

Second, the formwork of the technical solution of the present invention solves the problem of durability of reinforced concrete structures from the root. The permanent formwork of fiber-reinforced cement-based composite materials can be used as external reinforcement material of the structure, and can also be used as an auxiliary anode material for impressed current cathodic protection technology. . In addition, the use of fiber-reinforced cement-based composite permanent formwork can save formwork consumption. After construction, it can form a composite structure with concrete and bear the force together. It can improve the durability of the structure from the early stage of use and increase the overall durability of the structure. life cycle.

Third, using the template preparation scheme of the technical solution of the present invention solves the problems of uneven dispersion of fibers and incompact pouring, and the permanent template produced has better crack resistance, electrical conductivity and corrosion resistance, and has a wider application range; The prefabricated mold is relatively simple to process and install, with low production cost, efficient pouring production, and controllable product quality, which can meet the production needs of permanent column formwork of different thicknesses and heights, and effectively solve the problem of cement-based composite materials. The problem.

Description of drawings

FIG. 1 is a schematic structural diagram of a permanent formwork for a fiber-reinforced cement-based composite material column according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a bottom mold and an upper mold combined according to an embodiment of the present invention.

FIG. 3 is a top view of a bottom mold and an upper mold combined according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a bottom 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 present invention.

FIG. 6 is a schematic structural diagram of a bottom outer layer mold according to an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of an upper inner layer mold according to an embodiment of the present invention.

FIG. 8 is a schematic structural diagram of an upper outer layer mold according to an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of an inner layer cement-based composite material pouring funnel according to an embodiment of the present invention.

10 is a schematic structural diagram of a pouring funnel of an outer layer cement-based composite material according to an embodiment of the present invention.

FIG. 11 is a fiber mesh fixing stirrup according to an embodiment of the present invention.

FIG. 12 is a schematic structural diagram of the bottom segment permanent formwork during pouring according to the embodiment of the present invention.

FIG. 13 is a top view of the bottom segment permanent formwork during pouring of the embodiment of the present invention.

FIG. 14 is a schematic structural diagram of the upper segment permanent formwork during pouring according to the embodiment of the present invention.

FIG. 15 is a top view of the upper segment permanent formwork of the embodiment of the present invention when it is poured.

Reference numerals include:

1- inner layer of cement-based composite material hollow cylinder, 2- outer layer of cement-based composite material hollow cylinder, 3- fiber mesh;

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 mesh fixing member, 17- inner layer pouring funnel, 18- outer layer Layer pouring funnel;

21-first positioning hole, 22-ring groove, 23-second positioning hole, 24-first connecting angle steel, 25-bolt, 26-second connecting angle steel, 27-nested outer pipe, 28-nested inner Tube, 29-outer nested connection pipe, 30-inner nested connection pipe.

Detailed ways

The preferred embodiments of the present invention will be further described in detail below.

As shown in Figure 1, a fiber-reinforced cement-based composite material cylindrical permanent formwork comprises an inner-layer cement-based composite material hollow cylinder 1, a cylindrical fiber mesh 2, and an outer-layer cement-based composite material hollow cylinder 3, The fiber mesh 2 is located at the connection between the inner-layer cement-based composite hollow cylinder 1 and the outer cement-based composite hollow cylinder 3 . Further, the fiber mesh 2 is a carbon fiber mesh.

As shown in FIGS. 2 to 11 , the segmented prefabricated mold of the fiber-reinforced cement-based composite cylindrical permanent formwork includes a bottom plate 11, a bottom inner layer mold 12, a bottom outer layer mold 13, an upper inner layer mold 14, and an upper outer layer mold. Mold 15, fiber mesh fixing stirrup 16, inner layer pouring funnel 17, outer layer pouring funnel 18; the main bodies of the bottom inner layer mold 12, bottom outer layer mold 13, upper inner layer mold 14, and upper outer layer mold 15 are all It is a hollow cylinder, and the inner diameters of the bottom outer layer mold 13 and the upper outer layer mold 15 are larger than the outer diameters of the bottom inner layer mold 12 and the upper inner layer mold 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 22 for fixing the bottom inner layer mold 12 . The positioning holes 23, the first positioning holes 21 and the second positioning holes 23 are all 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 the bottom inner layer mold can be guaranteed. 12 and the bottom outer layer mold 13 are kept concentric, and the formed cavity has the same thickness in all directions.

As shown in Figures 5 and 6, the bottom inner layer mold 12 is provided with four second connection angles 26, and the bottom outer mold 13 is provided with four first connection angles 24; the first connection angles 24. The second connecting angle steel 26 is fixed with the bottom inner layer mold 12 and the bottom outer layer mold 13 by welding; the first connecting angle steel 24 and the second connecting angle steel 26 are provided with the first positioning holes 21, the second The circular holes with the same diameters of the positioning holes 23 can be connected to the first positioning holes 21 and the second positioning holes 23 of the bottom plate 11 by bolts 25 .

As shown in FIG. 7 , the bottom end of the upper inner layer mold 14 is provided with a nested inner tube 28 connected to the bottom inner layer mold 12; The inner diameter of the inner layer mold 14 is the same; the nested inner tube 28 is connected with the upper inner layer mold 14 by welding or bonding, and has a certain overlapping length.

As shown in FIG. 8 , the bottom end of the upper outer layer mold 15 is provided with a nested outer tube 27 connected to the bottom outer layer mold 13; The inner diameter of the layer mold 15 is the same; the nested outer tube 27 is connected with the upper outer layer mold 15 by welding or bonding, and has a certain overlapping length.

As shown in FIG. 9 , the bottom end of the inner layer pouring funnel 17 is provided with an inner layer nested connecting pipe 30 connected to the bottom inner layer mold 12 and the upper inner layer mold 14; The top of the nested connecting pipe 30 begins to gradually decrease in diameter from bottom to top to facilitate the pouring of the inner layer cement-based composite material; the inner diameter of the inner layer nested connecting pipe 30 and the bottom inner layer mold 12 and the upper inner layer mold are The outer diameter of 14 is the same; the inner layer cement-based composite material pouring funnel 17 can be integrally formed, or the inner layer nested connecting pipe 30 and the upper funnel are separately fabricated, and then the two are connected as a whole.

As shown in FIG. 10 , the bottom end of the outer layer pouring funnel 18 is provided with an outer layer nested connecting pipe 29 connected to the bottom outer layer mold 13 and the upper outer layer mold 15; The top of the nested connecting pipe 29 begins to gradually increase in diameter from bottom to top to facilitate the pouring of the outer layer cement-based composite material; 15 have the same inner diameter; the outer layer pouring funnel 18 can be made in one piece, or the outer layer nested connecting pipe 29 and the upper funnel can be made separately, and then the two are connected as a whole.

As shown in FIG. 11 , the width of the fiber mesh fixing member 16 is consistent with the cavity thickness between the bottom inner layer mold 12 or the upper inner layer mold 14 , the bottom outer layer mold 13 or the upper outer layer mold 15 , and the fiber mesh The middle of the fixing member 16 is provided with a groove for fixing the fiber mesh, and the width of the groove is consistent with the thickness of the fiber mesh.

The combination of pouring molds for the permanent formwork of the fiber-reinforced cement-based composite material column at the bottom segment is shown in Figure 12 and Figure 13. The bottom inner layer mold 12 and the bottom outer layer mold 13 are connected and fixed with the bottom plate 11 through the first connecting angle steel 24 and the second connecting angle steel 26, and the fiber mesh 2 is fixed in the annular groove 22 in the bottom plate 11, and the inner layer is fixed. The 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; then the cement-based composite material is poured, and the inner and outer layers should be poured at the same time. Vibrate.

The combination of pouring molds for the permanent formwork of the fiber-reinforced cement-based composite material column of the upper segment is shown in Figure 14 and Figure 15. 12 and 13, remove the inner layer pouring funnel 17 and the outer layer pouring funnel 18, and sleeve the upper inner layer mold 14 and the upper outer layer mold 15 on the bottom inner and outer layer molds 12 and the bottom outer layer mold 13. The upper end; the inner layer pouring funnel 17 and the outer layer pouring funnel 18 are nested into the upper inner layer mold 14 and the upper outer layer mold 15; then pour the cement-based composite material, the inner layer and the outer layer should be poured at the same time, and vibrating while pouring .

The method for preparing by using the above-mentioned preparation mold of the fiber-reinforced cement-based composite material prefabricated pipe includes:

(1) Bend the sheet-like fiber grid into a cylindrical shape with the required diameter, and leave a certain overlap length, and use epoxy resin bonding or fine wire binding to form.

(2) Apply mold release agent on the upper surface of the bottom plate, the outer surface of the bottom inner mold and the inner surface of the bottom outer mold.

(3) The bottom inner layer mold is fixedly connected to the bottom plate through the connecting angle steel, and then the cylindrical fiber grid is embedded in the groove of the bottom plate to ensure that the cylindrical fiber grid and the inner layer mold are on the same center of the circle, and finally The bottom outer layer mold is fixedly connected to the bottom plate by connecting angle steel to ensure that it is on the same circle center as the bottom inner layer mold.

(4) Install the fiber mesh fixing member in the cavity between the inner and outer molds at the bottom, arrange 4 equidistantly along the circumferential direction, and insert the fiber mesh into the groove in the middle of the fixing member to prevent pouring During the process, the position of the fiber mesh is shifted.

(5) Install the inner and outer layer pouring funnels on the upper ends of the inner and outer layer molds at the bottom, and press them firmly to prevent the pouring funnels from tilting during the pouring process.

(6) Pour the cement-based composite material between the inner and outer funnels to ensure that the cement-based composite materials on both sides are poured at the same time. During the pouring process, use a vibrating rod to vibrate and compact, and ensure that the fiber mesh is always maintained during the pouring process. in the center position.

(7) After the bottom segment permanent formwork is poured, remove the inner and outer layer pouring funnels and fiber mesh fixing members, and use a damp rag to clean up the residual cement base on the upper surface of the bottom mold, and then install the outer surface and upper part of the upper inner layer mold. The inner surface of the outer mold is coated with release agent.

(8) The upper inner and outer molds are nested and connected to the upper ends of the bottom inner and outer molds, and pressed firmly; then the fiber mesh fixing member is installed in the cavity between the upper inner and outer molds, along the ring. 4 are arranged at equal distances, and the fiber mesh is embedded in the groove in the middle of the fixed member; finally, the inner and outer layer pouring funnels are installed on the upper ends of the upper inner and outer layer molds, and pressed firmly to prevent the pouring process. The pouring funnel is tilted.

(9) Pour the cement-based composite material between the inner and outer funnels to ensure that the cement-based composite materials on both sides are poured at the same time. During the pouring process, use a vibrating rod to vibrate and compact to ensure that the fiber mesh is always kept in the pouring process. Center position.

(10) Repeat steps (7)-(9) until the pouring of the desired column permanent formwork is completed.

(11) Put the test piece on the plastic wrap and place it in a cool indoor place to harden. After 48 hours, remove the bottom and all upper molds in turn, then cover the components with plastic wrap, and naturally maintain for 28 days to complete the production of the permanent template.

(12) Clean the dismantled bottom plate, pouring funnel, and inner and outer molds for reuse.

The technical solution of this embodiment solves the problems of difficult pouring, uneven pouring and compaction and fiber agglomeration in the cement-based composite material due to small thickness and high height, and breaks through the thickness and height of the permanent formwork of the fiber-reinforced cement-based composite material column. It can ensure that the fiber grid is located at the preset position of the permanent formwork of the column and improve the dispersion uniformity of the fiber in the cement-based composite material. In this example, the fiber grid and the inner and outer layers of cement-based composite materials are constructed and maintained together, which avoids the weak interface between the old and new cement bases caused by the successive pouring of the inner and outer layers of cement bases. Therefore, the permanent formwork of the fiber-reinforced cement-based composite material column has better Internal bonding properties, crack resistance and overall coordination ability. The segmented prefabricated mold of the fiber-reinforced cement-based composite material column permanent formwork is easy to install and disassemble, efficient in pouring and production, controllable product quality, low in production cost, recyclable, energy-saving and environmentally friendly, and can meet the requirements of columns of different thicknesses and heights. The production requirements of permanent templates are convenient for large-scale promotion and use.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. a fiber-reinforced composite material column permanent formwork segment prefabricated mould, it is characterized in that: described fiber-reinforced composite material column permanent formwork comprises the cement-based composite material hollow cylinder positioned at inner layer, the cement-based composite material positioned at outer layer A hollow cylinder and a fiber mesh between the inner and outer layers; The fiber reinforced composite material column permanent formwork segmented prefabricated mold includes a base 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 the fiber grid; The inner layer mold includes a bottom inner layer mold and an upper inner layer mold, and the outer layer mold includes a bottom outer layer mold and an upper outer layer mold; the inner diameter of the outer layer mold is greater than the outer diameter of the inner layer mold, and the inner The layer mold and the bottom outer layer mold are all provided with connecting members connected to the bottom plate, and the bottom plate is provided with a positioning groove for fixing the fiber grid; the lower end of the inner layer pouring funnel is provided with a bottom inner layer mold, an inner layer connector for connecting the upper inner layer mold, the lower end of the outer layer pouring funnel is provided with an outer layer connector for connecting with the bottom outer layer mold and the upper outer layer mold; The inner layer pouring funnel has a small upper end and a large lower end, and the outer layer pouring funnel has a large upper end and a small lower end. 2. The fiber reinforced composite material column permanent formwork segmented prefabricated mold according to claim 1, wherein the upper inner layer mold is connected with the bottom inner layer mold through an inner nesting member, and the upper outer layer mold is connected by The outer nested member is connected to the bottom outer mold. 3. The fiber-reinforced composite material column permanent formwork segment prefabricated mold according to claim 2, wherein the inner nested member is an inner sleeve, and the outer diameter of the inner sleeve matches the inner diameter of the inner layer mold; The outer nested member is an outer sleeve, the inner diameter of the outer sleeve matches the outer diameter of the outer layer mold. 4. The fiber reinforced composite material column permanent formwork segment prefabricated mold according to 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 the same as the The outer diameter of the inner layer mold is matched; the outer layer connecting piece is an outer layer funnel nested part, and the outer diameter of the outer layer funnel nested part matches the inner diameter of the outer layer mold. 5. The fiber-reinforced composite material column permanent formwork segmented prefabricated mold according to claim 4, wherein the width of the fiber mesh fixing member matches the thickness of the cavity between the inner layer mold and the outer layer mold , and the middle of the fiber mesh fixing member is provided with a groove for fixing the fiber mesh. 6 . The fiber-reinforced composite material column permanent formwork segment prefabrication mold according to claim 5 , wherein the number of the fiber mesh fixing members is at least four. 7 . 7. The fiber reinforced composite material column permanent formwork segment prefabricated mold according to 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, characterized in that: it adopts the fiber-reinforced composite material column permanent template segmented prefabricated mold as claimed in any one of claims 1 to 7 to prepare, and it includes the following step: Step S1, the bottom inner layer mold is fixed on the bottom plate, the bottom outer layer mold is nested outside the bottom outer layer mold, and is fixedly connected with the bottom plate, the bottom of the fiber mesh is embedded in the positioning groove of the bottom plate, and the fiber mesh The grid fixing member is arranged between the bottom inner layer mold and the bottom outer layer mold, and fixes the fiber mesh, connects the inner layer pouring funnel with the upper end of the bottom inner layer mold, and connects the outer layer pouring funnel with the bottom outer layer mold. , pour the cement-based composite material into the cavity between the inner and outer molds through the inner pouring funnel and the outer pouring funnel, and pour the first segment permanent formwork; Step S2, remove the inner layer pouring funnel, the outer layer pouring funnel and the fiber mesh fixing member, connect the upper inner layer mold with the bottom inner layer mold, connect the upper outer layer mold with the bottom outer layer mold, and then connect the inner layer pouring funnel , The outer layer pouring funnel is respectively connected with the upper end of the upper inner layer mold and the upper outer layer mold, and the cement-based composite material is poured into the cavity between the inner layer and the outer layer mold through the inner layer pouring funnel and the outer layer pouring funnel. , pouring to make the second segment permanent formwork; Step S3, repeat step S2 until the permanent formwork pouring of all segments is completed; In step S4, after the template is hardened, the bottom plate, the outer mold, and the inner mold are removed for natural maintenance. 9. The fiber-reinforced composite material column permanent formwork segmented prefabricated mold according to claim 8, wherein step S3 includes removing the inner layer pouring funnel, the outer layer pouring funnel and the fiber mesh fixing member, and placing the upper layer The upper inner layer mold is connected to the upper inner layer mold of the next layer, the upper outer layer mold of the upper layer is connected to the upper outer layer mold of the next layer, and then the inner layer pouring funnel and the outer layer pouring funnel are respectively connected with the upper layer. The upper end of the upper inner layer mold of the first layer and the upper end of the upper outer layer mold of the upper layer are connected, and the cement-based composite material is poured into the cavity between the inner layer and the outer layer mold through the inner layer pouring funnel and the outer layer pouring funnel. , pouring to make the second segment permanent formwork; until the permanent formwork pouring of the entire fiber-reinforced cement-based composite material column is completed. 10. The fiber reinforced composite material column permanent formwork segmented prefabricated mold according to claim 1, characterized in that: in step S1, when the bottom inner layer mold and the bottom outer layer mold are fixed, the outer walls of the bottom plate and the bottom inner layer mold are , Apply a layer of release agent to the inner wall of the bottom outer mold, and calibrate whether the bottom inner mold and the bottom outer mold are concentric; In step S2, coat a layer of release agent 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 pouring the cement-based composite material, the fiber mesh The inside and outside of the grid are poured at the same time, and vibrated at the same time to ensure that the slurry is evenly distributed and the fiber grid is in the middle position; when the bottom layer is nested in the second layer of mold, the residual cement-based composite material on the upper end of the first layer of mold is cleaned up clean.

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