CN103711083B - A kind of double-deck comb shape template system and mounting method - Google Patents

Abstract

The present invention is a double-layer comb-shaped formwork system and an installation method. Its structure includes a lower side formwork, an outer layer comb-shaped formwork, an inner layer comb-shaped formwork, a fixing bracket, a screw rod, an ear seat, a pin, a bottom reinforcement mesh, Top layer steel mesh, beard steel bar, limit plate, limit block, bottom formwork, panel, vertical stiffener, horizontal stiffener, stiffener, vertical bar, inclined bar, nut, ear plate. The beneficial effects of the present invention are: the double-layer comb-shaped formwork system is easy to install, and it is basically formed after installation without mold adjustment; the integrity is good, the prefabricated concrete slab has clear edges and high precision; Layer comb-shaped formwork is complementary, which effectively solves the problems of serious side grout leakage and extremely inconvenient installation and removal of formwork during the construction of reinforced concrete prefabricated slabs with beards, making the construction fast and the site civilized and tidy.

Description

A double-layer comb formwork system and installation method

technical field

The invention relates to a double-layer comb-shaped formwork system and an installation method. Specifically, it effectively solves the problems of serious side grout leakage and extremely inconvenient installation and disassembly of formwork during construction of reinforced concrete prefabricated slabs equipped with beards. It belongs to the field of building construction.

Background technique

Steel-concrete composite beam structures are being used more and more in the fields of construction and bridges in my country. Among them, the structural form of concrete prefabricated slab + steel box girder is the most widely used because of its simple construction method. The thickness of prefabricated concrete slabs is generally less than 60cm. Some prefabricated concrete slabs adopt a variable cross-section. The main reinforcement of the mesh sheet is extended), and the spacing between the reinforcement bars is relatively dense, and some upper and lower layers of mustache reinforcement are closed ring structures, so the side formwork structure of the concrete prefabricated slab is particularly important. In the prior art, there are mainly three methods for the side formwork structure of the beard reinforced concrete prefabricated slab:

Method 1: Divide the side formwork into three parts: the lower formwork (i.e. the formwork for the bottom steel bar protection layer), the upper side formwork (i.e. the formwork for the top layer of reinforcement protection layer), and the middle side formwork (i.e. the formwork between the upper and lower layers of steel mesh) , and use wooden squares or steel pipes to support and fix the side formwork. This method has a simple template structure and simple processing, but because the template is divided into many blocks and the support is troublesome, the side profile of the prefabricated concrete slab is poor. board, where the side formwork cannot be removed normally.

Method 2, the side formwork consists of the lower formwork (i.e. the formwork for the protective layer of the bottom reinforcement), the comb-shaped upper side formwork (i.e. the formwork above the bottom reinforcement), and the plugging block (used to plug the comb-shaped formwork between the upper and lower layers of steel bars). strip gap). Compared with method 1, it can be applied to the construction of side formwork of all types of concrete precast slabs, but because the leak blocking blocks are used to seal leaks one by one, the construction efficiency is low, the labor intensity is high, the plugging effect is poor, and the side profile of the prefabricated concrete slab is poor. Less accurate.

Method 3, the side formwork is made of quick-easy closing net, which is extremely easy to install, but using quick-easy closing net formwork allows part of the mortar to seep out, so that civilized construction on site will hardly meet the requirements of modern construction technology industrialization, Moreover, the rigidity of the fast and easy closing net is poor, so that the side profile of the prefabricated concrete slab is poor and the accuracy is low.

Contents of the invention

The present invention proposes a double-layer comb-shaped formwork system and installation method. Its purpose is to overcome the above-mentioned defects in the prior art. Precision high bridge panels.

The technical scheme adopted by the present invention is: it is characterized in that it comprises a lower side formwork, an outer comb-shaped formwork, an inner layer comb-shaped formwork, and a fixing bracket, wherein the lower side formwork is located below the inner layer comb-shaped formwork and the outer layer comb-shaped formwork, The bottom layer of steel bars is used as the boundary; the outer comb-shaped formwork is supported on the lower side formwork and fixed by the fixing bracket, A screw and B screw; the inner layer comb-shaped formwork is clamped on the top layer of steel bars; the fixing bracket is set between the mustache bars; The outer layer comb-shaped formwork is composed of a panel, a vertical stiffener and a horizontal stiffener, wherein the panel is provided with a vertical notch corresponding to the beard steel bar, and the length of the vertical stiffener is longer than that of the panel, so as to facilitate installation. Hold the panel of the lower side formwork, so as to realize the limit; the vertical stiffener and the corresponding position of the screw rod are provided with a stiffener; the inner comb formwork is provided with a vertical notch corresponding to the outer comb formwork; The fixed bracket is composed of a horizontal bar, a vertical bar and a slanting bar, wherein there are round holes on the horizontal bar and the vertical bar, and correspondingly set A nuts and B nuts, and a connecting ear plate is provided at the lower end of the vertical bar and the slanting bar , a limit plate is provided below the cross bar; the vertical notch length of the inner layer comb formwork is shorter than the vertical notch length of the outer layer comb formwork twice the diameter of the beard steel bar; the inner layer comb formwork The length of the transverse notch is greater than the width of the vertical notch of the outer comb-shaped template, and smaller than the horizontal spacing of the vertical notches of the outer comb-shaped template.

The beneficial effects of the present invention are: the double-layer comb-shaped formwork system is easy to install, and can be basically shaped after installation without mold adjustment; Layer comb-shaped formwork is complementary, which effectively solves the problems of serious side grout leakage and extremely inconvenient formwork installation and disassembly during the construction of reinforced concrete precast slabs with beards, making the construction fast and the site civilized and tidy.

Description of drawings

Figure 1 is an assembled elevation view of the double-layer comb formwork system.

Fig. 2 is a schematic cross-sectional view of A-A in Fig. 1 .

Fig. 3 is a structural diagram of the outer comb-shaped plate in Fig. 1 .

Fig. 4 is a structural diagram of the inner layer comb plate in Fig. 1 .

Fig. 5 is a structural diagram of the fixing bracket in Fig. 1 .

Fig. 6 is a schematic diagram of Fig. 3, the inner and outer comb-shaped plates in Fig. 4 and the lower side formwork in Fig. 1 after cooperating and installing.

Figure 7-① is the state diagram after the installation of the lower formwork and the outer comb-shaped formwork is completed.

Figure 7-② is a state diagram after the installation of the inner comb formwork inserted along the vertical slot.

Figure 7-③ is the state diagram of pushing the inner comb-shaped formwork along the transverse notch and snapping the top layer of steel bars into the semicircular notch after installation.

1 in the figure is the lower side formwork, the outer comb formwork 2, the inner comb formwork 3, the fixed bracket 4, 5 is the A screw, 6 is the B screw, 7 is the ear seat, 8 is the pin, and 9 is the bottom layer Reinforcement mesh, 10 is the top layer of reinforcement mesh, 11 is the mustache reinforcement (that is, the bottom reinforcement mesh 9 and the top layer of reinforcement mesh 10 are exposed on the outside of the concrete bridge deck), 12 is the limit plate, 13 is the limit block, 14 is the bottom template, 15 is the panel, 16 is the vertical stiffener, 17 is the horizontal stiffener, 18 is the stiffener, 19 is the vertical rod, 20 is the oblique rod, 21 is the A nut, 22 is the B nut, 23 It is the lug plate, ① is the state after the installation of the lower formwork and the outer comb-shaped formwork is completed, ② is inserted into the inner comb-shaped formwork along the vertical notch, and ③ is to push the inner comb-shaped formwork along the horizontal notch, and make the top layer The rebar snaps into the half-circle notch.

Detailed ways

Embodiments/modes of the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1-6, the double-layer comb-shaped formwork system includes a lower formwork 1, an outer comb-shaped formwork 2, an inner comb-shaped formwork 3, and a fixed bracket 4, wherein the lower formwork 1 is located in the inner layer. The comb-shaped formwork 3 and the lower part of the outer layer comb-shaped formwork 2 are bounded by the bottom steel bar 9; the outer layer comb-shaped formwork 2 is supported on the lower side formwork 1, and is fixed by the fixed bracket 4 and the A screw rod 5 and the B screw rod 6; The layer comb formwork 3 is stuck on the top layer of steel bars 10; the fixed bracket 4 is arranged between the beard steel bars 11; the outer layer comb formwork 2 is composed of a panel 15, a vertical stiffener 16 and a horizontal stiffener 17, wherein the panel 15 is provided with a vertical notch corresponding to the beard steel bar 11, and the length of the vertical stiffener 16 is longer than that of the panel 15, so as to be against the panel of the lower formwork 1 during installation, so as to realize the limit; the vertical stiffener 16 A stiffener 18 is provided at the position corresponding to the screw rod 5; a vertical notch corresponding to the outer layer comb template 2 is provided on the inner layer comb template 3; Diagonal rod 20 is formed, wherein on horizontal rod 18, vertical rod 19, there are circular holes, and A nut 21, B nut 22 are arranged correspondingly, and the lower end of vertical rod 19 and oblique rod 20 is provided with connecting ear plate 23, Cross bar 18 belows are provided with limiting plate 12; The vertical notch length of described inner layer comb formwork 3 is shorter than the vertical notch length of outer layer comb formwork 2 twice the diameter of beard reinforcing bar 11; The length of the transverse notch of the layer comb template 3 is greater than the width of the vertical notch of the outer comb template 2, and is smaller than the horizontal spacing a of the vertical notches of the outer comb template.

The lower template is provided with a semicircular notch and is inclined at an angle.

The outer comb formwork 2 is provided with a vertical notch and the inner comb formwork 3 is provided with a transverse notch to form an inverted "L" shape, and the end of the inner comb formwork transverse notch is provided with an upward semicircular notch.

The screw includes two kinds of vertical and horizontal screws, and the fixing bracket is provided with fixing nuts corresponding to the two kinds of vertical and horizontal screws.

The horizontal notch spacing of the inner layer comb formwork 3 is the same as the vertical notch spacing of the outer layer comb formwork 2, both of which are the same as the horizontal spacing of the mustache reinforcing bars.

The vertical notch length of the inner layer comb formwork 3 is shorter than the vertical notch length of the outer layer comb formwork 1 times the beard steel bar diameter, and the inner layer comb formwork 3 horizontal notch lengths are greater than the outer comb formwork 2 The width of the vertical notch is less than the horizontal distance between the 2 vertical notches of the outer layer comb formwork.

Its installation method includes the following steps:

(1) Fix the lower formwork 1, ear seat 7 and bottom formwork 14 according to the setting out of the concrete bridge deck;

(2) Install the bottom reinforcement mesh 9 and the top reinforcement mesh 10, and snap the bottom reinforcement 9 into the semicircular notch of the lower formwork 1;

(3) The vertical notch of the outer comb-shaped template 2 is inserted into the bottom reinforcement mesh 9, and the exposed beard reinforcement 11 of the top reinforcement mesh 10;

(4) Install the fixed bracket 4, pin the ear plate 23 and the ear seat 7 through the pin 8, weld the limit block 13 on the horizontal stiffener 17 of the outer comb formwork 2 and the corresponding position, and use the limit of the fixed bracket 4 The plate 12 clamps the limit block 13, and the A screw 5 and the B screw 6 are respectively pressed against the strength plate 18 and the limit block 13;

(5) Insert the bottom reinforcement mesh 9 and the top reinforcement mesh 10 into the vertical notch corresponding to the inner comb formwork 3 and the outer comb formwork 2, and hang on the top reinforcement mesh 10 to the horizontal notch of the inner comb formwork 3 , push the inner comb formwork 3 along the direction of the transverse notch of the inner comb formwork 3, until the top layer of reinforcement 10 snaps into the semicircular notch of the inner comb formwork 3;

(6) Closely attach the inner comb formwork 3 to the outer comb formwork 2 to complete the plugging of the vertical notch of the outer comb formwork and complete the formwork installation.

The present invention is not limited to the above-mentioned best implementation mode, and no matter what changes are made by those skilled in the art under the enlightenment of the present invention, all technical solutions that are the same as or similar to the present invention are within the scope of protection.

Claims (1)

1. A method for installing a double-layer comb formwork system, characterized in that the method comprises the following steps: (1) Fix the lower formwork, ear seat and bottom formwork according to the setting out of the concrete bridge deck; (2) Install the bottom reinforcement mesh and the top reinforcement mesh, and snap the bottom reinforcement into the semicircular notch of the lower formwork; (3) The vertical notch of the outer comb-shaped formwork is inserted into the bottom reinforcement mesh, and the exposed mustache reinforcement of the top reinforcement mesh; (4) Install the fixed bracket, connect the lug plate and the ear seat through pins, weld the limit block on the horizontal stiffener plate of the outer comb-shaped formwork and the corresponding position, and clamp the limit block with the limit plate of the fixed bracket, and apply Screw the A screw and the B screw respectively to tighten the stiffener and the limit block; (5) The vertical slots corresponding to the inner comb-shaped formwork and the outer layer comb-shaped formwork are inserted into the bottom reinforcement mesh, the top reinforcement mesh, and the horizontal slots of the inner comb-shaped template are hung on the top reinforcement. Push the inner comb-shaped formwork in the direction of the horizontal notch of the formwork until the top layer of steel bars snap into the semicircular notches of the inner comb-shaped formwork; (6) Closely attach the inner comb-shaped formwork to the outer layer comb-shaped formwork to complete the plugging of the vertical notch of the outer comb-shaped formwork and complete the formwork installation.