CN111778862A

CN111778862A - Box girder inner mold and assembling method thereof

Info

Publication number: CN111778862A
Application number: CN202010678039.4A
Authority: CN
Inventors: 魏红刚; 杨凡; 刘琦; 邓国军; 陈国龙; 邓威; 杨志刚; 吕风国; 朱信斌
Original assignee: Xinjiang Road & Bridge Construction Group Co ltd
Current assignee: Xinjiang Road & Bridge Construction Group Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-10-16

Abstract

A box girder internal mold and an assembling method thereof relate to the technical field of construction site construction equipment. This case roof beam centre form includes coating film, a plurality of support piece and is two at least endoskeletons that set up side by side, wherein, adjacent two can dismantle the connection through the connecting piece between the endoskeleton to form endoskeleton subassembly, it is a plurality of support piece encloses to be located in order to form a support section of thick bamboo on the periphery wall of endoskeleton subassembly, the coating film cladding in the periphery of a support section of thick bamboo. It can solve the difficult problem of case roof beam centre form installation and demolition among the prior art.

Description

Box girder inner mold and assembling method thereof

Technical Field

The invention relates to the technical field of construction site equipment, in particular to a box girder internal mold and an assembling method thereof.

Background

The box girder is one of middle girders in bridge engineering, is hollow inside, is provided with flanges on two sides of the upper part, and is similar to a square box in shape, so that the box girder is named. As one of important structures in bridge engineering, the reinforced concrete box girder is widely used in bridge construction along with the rapid construction of highway construction and the increase of long and big bridges of the highway, particularly the rapid increase of the box girder with the length of more than 20 meters.

In the prior art, a precast beam yard undertakes a bridge box beam prefabrication construction task required in a standard section, the precast box beam is assembled by adopting a steel inner die and then integrally hoisted and placed into a side die, and after concrete pouring is finished, the inner die is adopted to gradually dismantle a single section. However, the traditional box girder inner mold has the problems of complex assembling process, heavy weight, more supporting rods and the like, so that the difficulty in assembling and disassembling the box girder inner mold is high, workers are labor-consuming and time-consuming in assembling and disassembling the templates, a high safety risk exists, and accidents such as the workers are easily injured by the templates. In addition, during high-temperature construction in summer, the temperature in the box is high, the inner die is difficult to disassemble, the construction efficiency is reduced, and the labor cost is high.

Disclosure of Invention

The invention aims to provide a box girder inner mold and an assembling method thereof, which can solve the problem that the box girder inner mold is difficult to install and disassemble in the prior art.

The embodiment of the invention is realized by the following steps:

the invention provides a box girder internal mold, which comprises a coating film, a plurality of supporting pieces and at least two internal frameworks which are arranged side by side, wherein every two adjacent internal frameworks are detachably connected through a connecting piece to form an internal framework assembly, the supporting pieces are arranged on the peripheral wall of the internal framework assembly in a surrounding mode to form a supporting cylinder, and the coating film is coated on the periphery of the supporting cylinder. It can solve the difficult problem of case roof beam centre form installation and demolition among the prior art.

Optionally, the cross section of the inner frame component is in an isosceles trapezoid shape.

Optionally, the slope of the waist of the isosceles trapezoid is less than or equal to 4: 1.

Optionally, the inner frame comprises a first annular frame and a second annular frame accommodated in the first annular frame, and the first annular frame and the second annular frame are welded together through a plurality of connecting rods.

Optionally, a preset included angle is formed between every two adjacent connecting rods.

Optionally, the first ring frame, the second ring frame and the connecting member are made of steel bars.

Optionally, the support is a square steel tube.

Optionally, two adjacent inner frameworks are connected through steel bar binding.

Optionally, a viewing port is further provided on the support cylinder.

Optionally, a binding band is further arranged on the peripheral wall of the supporting barrel, and the wrapping film wraps the periphery of the supporting barrel bound with the binding band.

In another aspect of the present invention, there is provided an assembling method of a box girder inner mold, including:

manufacturing an inner framework and an outer framework for supporting the inner framework, wherein the outer framework is of a first U-shaped structure;

arranging a plurality of supporting pieces in sequence along the inner cavity wall of the outer framework to form a second U-shaped structure, wherein two adjacent supporting pieces are mutually abutted;

arranging at least two inner frameworks in the inner cavity of the second U-shaped structure, wherein the inner frameworks are arranged side by side, and adjacent two inner frameworks are detachably connected through a connecting piece to form an inner framework assembly;

arranging a plurality of supporting pieces on the inner framework assembly to close the opening of the second U-shaped structure, so that the supporting pieces and the inner framework assembly form a supporting cylinder together;

and coating the supporting cylinder by using a coating film.

Optionally, the wrapping the support cylinder with a wrapping film includes:

binding and fixing the supporting cylinder by adopting a binding belt;

and coating the bound supporting cylinder by using a coating film.

The beneficial effects of the invention include:

the application provides a case roof beam centre form, include coating film, a plurality of support piece and be two at least endoskeletons that set up side by side, wherein, can dismantle the connection through the connecting piece between the two adjacent endoskeletons to form endoskeleton subassembly, a plurality of support piece surround locate on the periphery wall of endoskeleton subassembly in order to form a support section of thick bamboo, the coating film cladding is in the periphery of supporting a section of thick bamboo. When the box girder internal mold is installed, only the inner frameworks are detachably connected through the connecting pieces to form the inner framework assembly, the supporting pieces are arranged around the outer peripheries of the inner framework assemblies to form the supporting cylinders (the installation sequence is not limited), the overall stability is enhanced, and finally the supporting cylinders are coated through the coating films; when dismantling, only need demolish the connecting piece that is used for connecting two adjacent inner frames to extract the inner frame can, after the inner frame is taken out, support piece loses the inside that the support can scatter to the case roof beam centre form naturally. Consequently, the application provides a case roof beam centre form, simple structure, the installation and demolish of being convenient for to can solve to a certain extent and install and demolish the difficulty among the prior art, the problem that engineering time is long and intensity of labour is big.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an inner frame according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an exoskeleton according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an exoskeleton provided by an embodiment of the present invention with supporting members arranged thereon;

FIG. 4 is a schematic view of the inner frame, the outer frame and the supporting frame according to the embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating an assembling method of a box girder inner mold according to an embodiment of the present invention.

Icon: 10-a support; 20-an endoskeleton; 21-a first annular frame; 22-a second ring frame; 23-a connecting rod; 30-exo-skeleton.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present embodiment provides a box girder inner mold, which includes a coating film, a plurality of supporting members 10, and at least two inner frames 20 arranged side by side, wherein two adjacent inner frames 20 are detachably connected by a connecting member to form an inner frame assembly, the plurality of supporting members 10 surround an outer circumferential wall of the inner frame assembly to form a supporting cylinder, and the coating film is coated on an outer circumference of the supporting cylinder.

First, in the present embodiment, the shape of the inner frame assembly may be determined according to the shape of the hollow inside of the box girder to be poured, and the inner frame assembly is generally square.

Second, the inner frame subassembly forms through two at least inner frames 20 concatenation combinations, specifically, each inner frame 20 is and sets up side by side, and can dismantle the connection through the connecting piece between two adjacent inner frames 20. Specifically, in the embodiment, two adjacent inner frame components are bound through the steel bars.

For example, referring to fig. 1, fig. 1 is a schematic view of the structures of the inner frames 20, and each of the inner frames 20 is arranged side by side (when the inner frames 20 are in the illustrated shape, the center of each of the inner frames 20 should be on the same horizontal line). When the inner framework assembly is installed, the adjacent two inner frameworks 20 are detachably connected through the connecting piece, and the inner frameworks 20 can be assembled; the connectors are removed during disassembly and the inner frame 20 is sequentially removed. This application adopts two at least inner frame 20 and connecting piece combinations to form, and to a certain extent, for integrated into one piece's inner frame subassembly, its inner frame 20 of demolising can the reutilization, and because the inner frame subassembly can dismantle the connection, consequently, the length of the inner frame subassembly of this application is adjustable, can be applicable to the preparation of multiple specification case roof beam centre form.

Third, a plurality of supporting members 10 are enclosed on the outer circumferential wall of the inner frame member to form a supporting cylinder. That is, a plurality of supporting members 10 are sequentially arranged on the outer circumferential wall of the inner frame member to form a supporting cylinder. Thus, the overall stability and deformation resistance of the inner skeleton assembly can be effectively improved. Specifically, for making the resistance to deformation and the overall stability of the case roof beam centre form of this application better, in this embodiment, support piece 10 adopts the square steel pipe, and so, the square steel pipe of also being convenient for arranges on the inner frame subassembly periphery wall.

Compare with traditional steel construction inner membrance, this application utilizes support piece 10 to establish the combination form of assembling of round in the periphery of inner frame subassembly, and utilizes the inner frame subassembly as supporting not deformation of guarantee work progress in the case roof beam centre form, and whole support is firm. The supporting piece 10 and the inner frame component act together to enable the box girder inner mold to be integrally under the action of pressure in all directions, the deformation and damage resistance is improved, the possibility of damage to the box girder inner mold can be effectively reduced to a certain extent, and the turnover utilization rate of the whole material is improved.

In addition, a plurality of support piece 10 of this application arrange in proper order on the periphery wall of interior skeleton subassembly, each support piece 10 itself and interior skeleton subassembly do not have the lug connection, only the overlap joint or pile up on the interior skeleton subassembly, so, the case roof beam centre form of this application, after the case roof beam is pour and is accomplished, when needing to demolish the case roof beam centre form, only need demolish the connecting piece that is used for connecting two adjacent inner frame 20, and extract inner frame 20 can, after inner frame 20 takes out, support piece 10 loses the inside that the support can scatter to the case roof beam centre form naturally, thereby to a certain extent, the case roof beam centre form of this application is easily disassembled from the concrete case roof beam after the shaping.

Fourthly, because a plurality of support piece 10 of this application enclose on locating the periphery wall of inner frame subassembly, it does not have fixed connection relation with inner frame subassembly, for making support piece 10 and inner frame subassembly become an organic whole, this application has still set up the coating film, and this coating film cladding is in the periphery of a support section of thick bamboo, specifically, the cladding is in the periphery of support piece 10.

The coating film can also isolate a supporting cylinder and concrete in the box girder pouring construction process except that the supporting piece 10 and the inner frame assembly are integrated, so that the concrete is prevented from entering the inner die of the box girder and influencing the secondary utilization of the inner die of the box girder.

To sum up, the case roof beam centre form that this application provided, including coating film, a plurality of support piece 10 and be two at least inner frame 20 that set up side by side, wherein, can dismantle the connection through the connecting piece between two adjacent inner frame 20 to form inner frame subassembly, a plurality of support piece 10 enclose on the periphery wall of locating inner frame subassembly in order to form a support section of thick bamboo, the coating film cladding in the periphery of supporting a section of thick bamboo. When the box girder internal mold is installed, the inner framework 20 only needs to be detachably connected through the connecting piece to form the inner framework assembly, the supporting piece 10 is arranged on the outer periphery of the inner framework assembly to form the supporting cylinder (the installation sequence is not limited), the integral stability is enhanced, and finally the supporting cylinder is coated through the coating film; when the box girder internal mold is disassembled, only the connecting pieces used for connecting the two adjacent internal frameworks 20 need to be disassembled, and the internal frameworks 20 are extracted, and after the internal frameworks 20 are extracted, the supporting pieces 10 lose support and naturally scatter to the inside of the box girder internal mold. Consequently, the application provides a case roof beam centre form, simple structure, the installation and demolish of being convenient for to can solve to a certain extent and install and demolish the difficulty among the prior art, the problem that engineering time is long and intensity of labour is big.

The application provides a case roof beam centre form, it is not only little that occupation space is under construction in a flexible way. Compared with the traditional drawing type inner membrane, the drawing type inner membrane has the advantages that professional workshop processing is not needed, mechanical cooperation is not needed in assembling, the unit price of the material is lower, the cost of the whole material is obviously reduced, the construction efficiency is obviously improved, the drawing type inner membrane is convenient to disassemble, and the damage to the concrete in the disassembling process is prevented. The mode that the case roof beam centre form adopted the whole parcel of coating film can effectively isolated concrete and support piece 10 bond, has improved the convenience that the case roof beam centre form was demolishd.

Optionally, in this embodiment, in order to make the forces applied to the internal mold of the box girder relatively uniform, as shown in fig. 1, the cross section of the internal framework assembly is disposed in an isosceles trapezoid.

In order to facilitate the arrangement of the plurality of supporting members 10 on the inner frame assembly, in this embodiment, the slope of the waist of the isosceles trapezoid is not greater than 4: 1. Specifically, the slope of the waist of the isosceles trapezoid is between 3:1 and 4: 1.

Specifically, in the present embodiment, as shown in fig. 1, the inner frame 20 includes a first annular frame 21 and a second annular frame 22 accommodated in the first annular frame 21, and the first annular frame 21 and the second annular frame 22 are welded together by a plurality of connecting rods 23. When the inner frame assembly needs to be assembled into an inner frame assembly, the two adjacent inner frames 20 can be detachably connected through the connecting piece. Illustratively, to facilitate assembly of the inner frame assembly, a connector may be banded at the second annular frame 22 of the inner frame 20.

First, in order to enhance the connection strength and stability of the first ring frame 21 and the second ring frame 22, in the present embodiment, a predetermined included angle is formed between two adjacent connection rods 23. Preferably, two adjacent connecting rods 23 and the first ring frame 21 or the second ring frame 22, respectively, may form a triangular structure (as shown in fig. 1).

Second, in order to reinforce the strength of the inner frame 20, in the present embodiment, the first ring frame 21, the second ring frame 22, and the connecting members are made of steel bars.

Further, in order to control the pouring quality of the concrete, in the embodiment, the box girder inner mold is further provided with a concrete pouring observation port on the supporting cylinder. In particular, the bottom of the supporting cylinder is arranged. The supporting member 10 (when the supporting member 10 is a square steel pipe, the square steel pipe) having the same size and different lengths is used to form the gap.

Adopt the mode that every 2m set up one and press the thick stick simultaneously, effectively increase the centre form wholeness, centre form come-up when preventing concrete placement causes the quality problem, precast beam board overall quality obtains showing and promotes.

Furthermore, a binding belt is further arranged on the peripheral wall of the supporting barrel, and the coating film is coated on the periphery of the supporting barrel with the binding belt. The binding bands can be bound to the periphery of the supporting cylinder at intervals of about 50cm so that the supporting member 10 of the supporting cylinder and the inner frame assembly are assembled together.

The present embodiment further provides an assembling method of the box girder inner mold, please refer to fig. 5. The assembling method of the box girder inner die comprises the following steps:

s100: an inner frame 20 and an outer frame 30 for supporting the inner frame 20 are fabricated, wherein the outer frame 30 has a first U-shaped configuration.

First, before the step S100 is performed, construction materials (such as steel bars, square steel pipes, and processing equipment required for construction) are prepared, and design drawings of the inner frame 20 and the outer frame 30 of the box girder inner mold are drawn according to the size requirement of the box girder inner mold.

Second, in this embodiment, the inner frame 20 can be formed by welding steel bars, and the outer frame 30 can be formed by welding channel steel, and during the welding process, it is necessary to pay attention to the blanking and welding strictly according to the requirements.

Third, after the inner frame 20 and the outer frame 30 for supporting the inner frame 20 are manufactured, inspection and acceptance are required to ensure the welding quality of the inner frame 20 and the outer frame 30, so as to ensure the integrity and stability of the inner frame 20 and the outer frame 30.

S200: the plurality of supporting members 10 are sequentially arranged along the inner cavity wall of the exoskeleton 30 to form a second U-shaped structure, wherein two adjacent supporting members 10 are abutted against each other.

Before the step S200 is executed, the linearity and the distance between the manufactured outer frames 30 are adjusted on the inner mold assembling table, so that the outer frames 30 are arranged side by side. At least two outer frameworks 30 (in this embodiment, two outer frameworks 30 are preferred for each section of the box girder inner model) are used for each section of the box girder inner model, and a plurality of supporting pieces 10 (in this embodiment, square steel pipes) are respectively lapped on the outer frameworks 30 which are arranged side by side. And the plurality of supporting members 10 are sequentially arranged along the inner cavity wall of the outer frame 30 (as shown in fig. 3, the square steel pipes are sequentially arranged at the bottom and the side of the outer frame 30 to form a bottom die and a side die respectively, and the bottom die and the two side dies together form a second U-shaped structure).

The two adjacent supporting members 10 abut against each other, that is, the two adjacent supporting members 10 lean against each other, as shown in fig. 3, and preferably, the two adjacent supporting members 10 are arranged side by side without a gap.

In addition, in the process of erecting the second U-shaped structure, a bottom observation port can be reserved when the bottom die is formed, so that the pouring quality of concrete can be observed conveniently.

S300: at least two inner frames 20 are arranged in the inner cavity of the second U-shaped structure, the inner frames 20 are arranged side by side, and the adjacent two inner frames 20 are detachably connected through connecting pieces to form an inner frame assembly. That is, the adjacent two inner frames 20 are detachably connected by a connector (a reinforcing bar in this embodiment).

S400: a plurality of support members 10 are arranged on the inner frame assembly to close the opening of the second U-shaped structure so that the support members 10 and the inner frame assembly together form a support cylinder.

S500: and coating the supporting cylinder by using a coating film.

It should be noted that, before step S500 is executed, in the present embodiment, a binding band is first used to bind and fix the support cylinder. Namely, the binding belt is bound on the peripheral wall of the supporting cylinder. And then the bound supporting cylinder is coated by a coating film. After the coating film is used for coating, the concrete and the supporting piece 10 can be separated, and demolding during disassembly is facilitated.

In addition, it should be understood that the method for assembling the box girder inner mold of the present application only exemplifies the assembly of each section of the box girder inner mold. When each section of box girder inner mold needs to be assembled in a combined mode, each section of box girder inner mold is assembled in a butt joint mode, the splicing positions of two adjacent sections of box girder inner molds are wrapped in a stacked mode through two pieces of cloth and one piece of film, and the greenhouse film is used for wrapping gaps after wrapping, so that concrete leakage caused by damage of the greenhouse film is prevented.

After the assembly is finished, the overall stability is checked, and whether the grout stopping treatment is done at the splicing part is checked.

It should be understood that after the box girder is poured and the strength of the concrete meets the demolding requirement, the inner mold needs to be detached section by section. The connecting piece (the connecting piece that is used for connecting two adjacent inner frames 20) is demolishd earlier, demolishs inner frame 20 one by one again, and because of there being the coating isolation, support piece 10 can drop naturally, can assemble the use again after transporting out the box girder with inner frame 20 and support piece 10 after demolishing. In addition, the bottom of the inner frame 20 is tapped during dismantling, a steel pipe is arranged between the inner frame 20 and concrete for blocking, the concrete cannot be damaged, the strength of the concrete meets the requirement of demoulding, and the inner frame 20 can be taken out after loosening.

The above description is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a case roof beam centre form, its characterized in that includes coating film, a plurality of support piece and is two at least endoskeletons that set up side by side, wherein, adjacent two can dismantle the connection through the connecting piece between the endoskeleton to form endoskeleton subassembly, it is a plurality of support piece encloses to be located in order to form a support section of thick bamboo on the periphery wall of endoskeleton subassembly, the coating film cladding in the periphery of supporting a section of thick bamboo.

2. The box girder internal mold according to claim 1, wherein the cross section of the inner framework assembly is in an isosceles trapezoid shape, and the slope of the waist of the isosceles trapezoid shape is not more than 4: 1.

3. The box girder inner mold according to claim 1, wherein the inner frame includes a first ring frame and a second ring frame received in the first ring frame, and the first ring frame and the second ring frame are welded together by a plurality of connecting rods.

4. The box girder inner mold according to claim 3, wherein the first ring frame, the second ring frame and the connecting members are made of steel bars, and a predetermined included angle is formed between two adjacent connecting rods.

5. The box girder inner mold according to claim 1, wherein the support member is a square steel pipe.

6. The box girder inner formwork of claim 1, wherein two adjacent inner frameworks are connected by binding of steel bars.

7. The box girder inner mold according to claim 1, wherein a viewing port is further provided on the support cylinder.

8. The box girder inner mold according to claim 1, wherein a binding band is further provided on the outer peripheral wall of the support cylinder, and the wrapping film is wrapped around the periphery of the support cylinder to which the binding band is bound.

9. An assembling method of a box girder inner die is characterized by comprising the following steps:

and coating the supporting cylinder by using a coating film.

10. The method for assembling an inner mold of a box girder according to claim 9, wherein the wrapping the support cylinder with the wrapping film comprises:

binding and fixing the supporting cylinder by adopting a binding belt;

and coating the bound supporting cylinder by using a coating film.