Concrete frame column formwork fastening system capable of being rapidly assembled and disassembled

Abstract

The utility model discloses a concrete frame column formwork fastening system capable of being rapidly assembled and disassembled. Convenient, accurate and programmed erecting of a square hoop is achieved. Four I-shaped steel fastening drag hook rods are in lap joint end to end in a staggered mode to form a square hoop of a concrete frame column formwork, and a flange plate on one side of each I-shaped steel fastening drag hook rod is connected to a wooden ridge of the formwork in an abutting mode. A positioning pin is inserted into a pair of through holes with internal threads correspondingly formed in an upper web plate and a lower web plate of a head hook body of one fastening hook rod and a long-strip-shaped bolt hole formed in a tail web plate of the other corresponding fastening hook rod, and preliminary positioning of the four I-shaped steel fastening hook rods at the formwork fastening position is achieved. Long-strip-shaped conical wedges are synchronously beaten into long-strip-shaped bolt holes in the outer sides of the lap joint positions of the two fastening drag hook rods in the diagonal direction; and finally, the positioning pin at the head of the hook is taken out, and an upper jackscrew and a lower jackscrew are screwed into the threaded through hole in the head of the hook, so that the lap joint of the two fastening drag hook rods is fixed in a propping manner.

Description

Technical Field

[0001] The present invention relates to a formwork for concrete frame columns, and particularly to a fastening system for a formwork for casting concrete frame columns that can achieve accurate positioning and quick installation and removal, and its construction method, which is applicable to the fastening and construction of formworks for casting concrete columns wrapping steel skeleton columns. Background Art

[0002] For some buildings with large spans, independent concrete frame columns are spaced at the center of the span as support columns for the frame roof slab to enhance the overall support strength of the building. These concrete frame columns are steel skeleton columns, with I-shaped or cross-shaped steel plates provided in the columns as the main support skeletons, and a steel bar skeleton is constructed outside the main support of the steel plates. A formwork for casting concrete is erected outside the steel bar skeleton, and then concrete is cast to form a concrete frame column. Since I-shaped or cross-shaped steel plate skeletons are pre-set in the steel skeleton columns, when erecting the formwork for casting concrete, the tension bolts for fixing the formwork cannot pass through the steel plate skeletons. In order to fix the formwork for casting concrete, the prior art is to clamp and fasten the formwork with double-row steel pipes outside the formwork for casting the steel skeleton column. This fixing method has the defects of difficult operation in clamping and reinforcing the formwork, unreliable formwork fixation, easy formwork bulging during casting, and time-consuming and laborious formwork removal.

[0003] The Chinese patent document with the patent number 2018100232632 discloses a steel skeleton column formwork fastening device and a fastening method, which form a square hoop for the mouth-shaped formwork of a concrete frame column by overlapping four fastening hook rods in a head-to-tail staggered manner, realizing the fastening of the formwork for the concrete frame column. This technical solution reduces the fastening difficulty of the concrete frame column and improves the erection accuracy of the formwork. However, this fastening method has the problem of inconvenient on-site erection positioning control. When there are a large number of concrete frame columns to be erected, the four fastening hook rods in the above method cannot achieve rapid and accurate positioning during the construction of fastening the formwork. At the same time, since the hooked fastening hook rods in this technical solution are positioned and fixed by the wedging extrusion of long strip-shaped tapered wedges, and the long strip-shaped tapered wedges at the four connection points cannot be wedged synchronously, the forces on the four faces of the mouth-shaped formwork are inconsistent, and the square hoop formed by the four fastening hook rods is prone to twisting and dislocation, and local formwork bulging is likely to occur during the subsequent concrete casting and vibration of the frame column. How to simplify and program the on-site installation and removal of this fastening device and improve the positioning accuracy and anti-formwork-bulging ability of the square hoop has become a key problem to be solved in on-site actual operation. Summary of the Invention

[0004] The present invention provides a concrete frame column formwork fastening system that can be quickly assembled and disassembled, realizes the convenient, accurate and procedural erection of square clamps, and greatly improves the on-site construction efficiency and fastening quality.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The overall concept of the present invention is as follows: an I-beam is used to make a fastening hook rod, the I-beam is bent horizontally (that is, the web of the I-beam is in a horizontal setting state) to form a hook body of the hook rod, and through holes with internal threads are correspondingly arranged on the upper and lower webs of the head hook body of the fastening hook rod, and two rows of long strip pin holes are arranged on the tail web of the fastening hook rod, and the two rows of long strip pin holes need to be arranged at a half-hole spacing from each other; four I-beam fastening hook rods are staggered and overlapped head to tail to form a square clamp of the concrete frame column template, and one side flange plate of the I-beam fastening hook rod is abutted against the wooden slats of the template, and a positioning pin is inserted into a pair of through holes with internal threads correspondingly arranged on the upper and lower webs of the head hook body of the fastening hook rod and a corresponding long strip pin hole arranged on the tail web of another fastening hook rod, so as to realize the preliminary positioning of the four I-beam fastening hook rods in the fastening position of the template; then, along the diagonal direction, the two fastening hook rods are respectively fixed to the two fastening hook rods. A long conical wedge is simultaneously driven into the long pin hole on the outside of the overlap, so that the two fastening hook rods in the left and right directions clamp the left and right templates, and the two fastening hook rods in the front and rear directions clamp the front and rear templates; finally, the positioning pin of the bent hook head is taken out, and is screwed into the threaded through hole of the bent hook head with upper and lower top screws, and the top connection and fixation of the overlap of the two fastening hook rods is achieved by tightening the upper and lower top screws, so as to achieve the purpose of improving the clamping and fastening of the square clamp through the second fastening measure; the erection process of the square clamp of the present invention is: preliminary positioning is carried out by plugging pins, and long conical wedges are driven diagonally to achieve the fastening of two parallel templates, and the final fixation of the square clamp is achieved by secondary fastening with top screws. The above-mentioned operation steps realize the simplification and proceduralization of on-site installation and disassembly, greatly improve the fastening quality of the clamp, and overcome the defect of easy expansion of the mold due to uneven force on the template fastening.

[0007] A quickly detachable formwork fastening system for a concrete frame column, including a formwork for the frame column. Wooden keels are spacedly arranged on the outer vertical surface of the formwork for the frame column. Main reinforcement bars and stirrups are respectively arranged inside the formwork for the frame column. On the outer side of the wooden keels, left I-beam fastening hook bars, rear I-beam fastening hook bars, right I-beam fastening hook bars and front I-beam fastening hook bars that are sequentially and staggeringly lapped end to end are arranged to form a square hoop. The structures of the left I-beam fastening hook bar, the rear I-beam fastening hook bar, the right I-beam fastening hook bar and the front I-beam fastening hook bar are exactly the same. The left I-beam fastening hook bar is obtained by bending the end of a horizontally lying I-beam to form the head hook body of the hook bar. A pair of internally threaded threaded through holes are correspondingly arranged on the web of the head hook body. First row of long strip pin holes and second row of long strip pin holes are respectively arranged on the tail web of the left I-beam fastening hook bar. The first row of long strip pin holes and the second row of long strip pin holes are arranged with a hole pitch that is staggered by half a hole; the inner flange plate of the left I-beam fastening hook bar abuts against the outer vertical surface of the wooden keel. A long strip tapered wedge is arranged in the long strip pin hole at the tail of the rear I-beam fastening hook bar on the outer side of the hook connection lap joint between the head hook body of the left I-beam fastening hook bar and the tail of the rear I-beam fastening hook bar. The long strip tapered wedge abuts against the outer flange plate of the left I-beam fastening hook bar; another long strip tapered wedge is arranged in the long strip pin hole at the tail of the left I-beam fastening hook bar on the outer side of the hook connection lap joint between the head hook body of the front I-beam fastening hook bar and the tail of the left I-beam fastening hook bar. The other long strip tapered wedge abuts against the outer flange plate of the front I-beam fastening hook bar; a top screw is screwed in the threaded through hole. The lower end of the top screw abuts against the upper end surface of the tail web of the rear I-beam fastening hook bar. A bottom screw is screwed in the threaded through hole below the head hook body of the left I-beam fastening hook bar corresponding to the threaded through hole. The upper end of the bottom screw abuts against the bottom surface of the tail web of the rear I-beam fastening hook bar.

[0008] The sequentially and staggeringly lapped end to end left I-beam fastening hook bar, rear I-beam fastening hook bar, right I-beam fastening hook bar and front I-beam fastening hook bar mentioned above means that the opening of the head hook body of the left I-beam fastening hook bar is arranged upward and hooks to the tail of the rear I-beam fastening hook bar; the opening of the head hook body of the rear I-beam fastening hook bar is arranged downward and hooks to the tail of the right I-beam fastening hook bar; the opening of the head hook body of the right I-beam fastening hook bar is arranged upward and hooks to the tail of the front I-beam fastening hook bar; the opening of the head hook body of the front I-beam fastening hook bar is arranged upward and hooks to the tail of the left I-beam fastening hook bar where the opening of the head hook body of the front I-beam fastening hook bar is arranged downward; this arrangement makes the rod part of the left I-beam fastening hook bar and the rod part of the right I-beam fastening hook bar in the same horizontal plane, and makes the rod part of the rear I-beam fastening hook bar and the rod part of the front I-beam fastening hook bar in the same horizontal plane.

[0009] A construction method for a quick-installable and removable formwork fastening system for concrete frame columns, characterized by the following steps:

[0010] First step: According to the pre-marked positions of the formwork fastening hoops for the concrete frame columns, set the left I-beam fastening hook rod on the left side surface of the wooden keel on the left side surface of the concrete frame column formwork, and make the inner flange plate of the left I-beam fastening hook rod abut against the outer side surface of the wooden keel, so that the opening of the head hook body of the left I-beam fastening hook rod is arranged upward; set the rear I-beam fastening hook rod on the rear side surface of the wooden keel on the rear side surface of the concrete frame column formwork, and make the inner flange plate of the rear I-beam fastening hook rod abut against the outer side surface of the wooden keel, so that the opening of the head hook body of the rear I-beam fastening hook rod is arranged downward, and make the tail of the rear I-beam fastening hook rod pass through the head hook body of the left I-beam fastening hook rod; set the right I-beam fastening hook rod on the right side surface of the wooden keel on the right side surface of the concrete frame column formwork, make the inner flange plate of the right I-beam fastening hook rod abut against the outer side surface of the wooden keel, so that the opening of the head hook body of the right I-beam fastening hook rod is arranged upward, and make the tail of the right I-beam fastening hook rod pass through the head hook body of the rear I-beam fastening hook rod; set the front I-beam fastening hook rod on the front side surface of the wooden keel on the front side surface of the concrete frame column formwork, make the inner flange plate of the front I-beam fastening hook rod abut against the outer side surface of the wooden keel, and make the opening of the head hook body of the front I-beam fastening hook rod arranged downward, and make the tail of the left I-beam fastening hook rod pass through the head hook body of the front I-beam fastening hook rod;

[0011] Second step: Horizontally move the left I-beam fastening hook rod forward. After the head hook body of the left I-beam fastening hook rod hooks tightly with the tail of the rear I-beam fastening hook rod, insert the first positioning pin between the threaded through hole and the long strip pin hole at the tail of the rear I-beam fastening hook rod corresponding to the threaded through hole; at the same time, use the same method to insert the second positioning pin at the hooking joint between the head hook body of the rear I-beam fastening hook rod and the tail of the right I-beam fastening hook rod, insert the third positioning pin at the hooking joint between the head hook body of the right I-beam fastening hook rod and the tail of the front I-beam fastening hook rod, and insert the fourth positioning pin at the hooking joint between the head hook body of the front I-beam fastening hook rod and the tail of the left I-beam fastening hook rod; realizing the preliminary fastening and positioning of the square hoop on the concrete frame column formwork;

[0012] Step 3: Insert the strip-shaped tapered wedge into the long-strip pin hole at the tail of the rear I-beam fastening hook rod on the outside of the hooked connection lap between the head hook body of the left I-beam fastening hook rod and the tail of the rear I-beam fastening hook rod, and make the first strip-shaped tapered wedge abut against the outer flange plate of the left I-beam fastening hook rod; insert the second strip-shaped tapered wedge into the long-strip pin hole at the tail of the right I-beam fastening hook rod on the outside of the hooked connection lap between the head hook body of the rear I-beam fastening hook rod and the tail of the right I-beam fastening hook rod, and make the second strip-shaped tapered wedge abut against the outer flange plate of the rear I-beam fastening hook rod; insert the third strip-shaped tapered wedge into the long-strip pin hole at the tail of the front I-beam fastening hook rod on the outside of the hooked connection lap between the head hook body of the right I-beam fastening hook rod and the tail of the front I-beam fastening hook rod, and make the third strip-shaped tapered wedge abut against the outer flange plate of the right I-beam fastening hook rod; insert the fourth strip-shaped tapered wedge into the long-strip pin hole at the tail of the left I-beam fastening hook rod on the outside of the hooked connection lap between the head hook body of the front I-beam fastening hook rod and the tail of the left I-beam fastening hook rod, and make the fourth strip-shaped tapered wedge abut against the outer flange plate of the front I-beam fastening hook rod;

[0013] Step 4: Pull out the first positioning pin and the third positioning pin, and simultaneously tap the first strip-shaped tapered wedge and the third strip-shaped tapered wedge, so that the rod bodies of the left I-beam fastening hook rod and the right I-beam fastening hook rod are clamped on the left and right sides of the concrete frame column formwork in the left-right direction; connect the top screw in the threaded through hole, and rotate the top screw so that the bottom end of the top screw abuts against the top surface of the tail web of the rear I-beam fastening hook rod. Connect the bottom screw in the threaded through hole corresponding to the lower part, and rotate the bottom screw so that the top end of the bottom screw abuts against the bottom surface of the tail web of the rear I-beam fastening hook rod, to achieve the fastening and fixing in the up-down direction of the hooked connection between the head hook body of the left I-beam fastening hook rod and the tail of the rear I-beam fastening hook rod; connect the top and bottom screws in the same way in a pair of threaded through holes on the head hook body of the right I-beam fastening hook rod, so as to achieve the fastening and fixing in the up-down direction of the hooked connection between the head hook body of the right I-beam fastening hook rod and the tail of the front I-beam fastening hook rod;

[0014] Step 5: Remove the second positioning pin and the fourth positioning pin, and simultaneously tap the second long strip-shaped tapered wedge and the fourth long strip-shaped tapered wedge, so that the rod body of the rear I-beam fastening hook rod and the rod body of the front I-beam fastening hook rod are clamped on the front and rear sides of the concrete frame column formwork in the front-rear direction; Connect the upper and lower jackscrews respectively in a pair of threaded through holes of the head hook body of the rear I-beam fastening hook rod, so as to realize the fastening and fixing in the up-down direction of the connection between the head hook body of the rear I-beam fastening hook rod and the tail hook of the right I-beam fastening hook rod; In a pair of threaded through holes on the head hook body of the front I-beam fastening hook rod, connect the upper and lower jackscrews respectively in the same way, so as to realize the fastening and fixing in the up-down direction of the connection between the head hook body of the front I-beam fastening hook rod and the tail hook of the left I-beam fastening hook rod.

[0015] Step 6: Along the up-down direction, at the positions of the concrete frame column formwork fastening hoops marked in advance, construct each square hoop respectively to complete the construction of the entire concrete frame column formwork fastening system;

[0016] Step 7: Pour concrete inside the frame column formwork to form a concrete frame column;

[0017] Step 8: After the concrete in the poured concrete frame column has finally set, first remove the upper and lower jackscrews in each square hoop;

[0018] Step 9: Remove the long strip-shaped tapered wedges in each square hoop through the pin holes at the top of the long strip-shaped tapered wedges;

[0019] Step 10: Remove and store each I-beam fastening hook rod in the square hoop for use when reinforcing the next frame column formwork.

[0020] The present invention realizes the convenience and programming of the installation of the square hoops for the concrete frame column formwork, enables the accurate positioning of the square hoops, and makes the fastening forces of the four-sided formworks of the concrete frame column uniform; Through the extrusion and abutment of the long strip-shaped tapered wedge and the outer flange plate of the I-beam fastening hook rod, the fastening in the left-right or front-rear direction in the horizontal plane at the intersection and hook connection of the two I-beam fastening hook rods is realized. Through the butting of the upper and lower jackscrews on the head hook body, the fastening in the up-down direction at the intersection and hook connection of the two I-beam fastening hook rods is realized, strengthening the connection and fastening at the intersection and hook connection of the two I-beam fastening hook rods from two mutually perpendicular directions, greatly improving the fastening force of the square hoop on the frame column formwork, minimizing the operation differences of construction workers, being convenient to use, facilitating the installation and removal by construction workers, and greatly improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2It is a schematic structural diagram of the left I-beam fastening hook rod 5 of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the long strip-shaped tapered wedge 9 of the present invention. Specific embodiments

[0024] The present invention will be described in detail below with reference to the accompanying drawings:

[0025] A quickly detachable formwork fastening system for a concrete frame column, including a frame column formwork 1 in the shape of a square frame. On the four outer vertical surfaces of the frame column formwork 1, wooden keels 2 are arranged at intervals. Inside the frame column formwork 1, the main reinforcement bars 3 and stirrups 4 of the concrete frame column are respectively arranged. Outside the wooden keels 2, left I-beam fastening hook bars 5, rear I-beam fastening hook bars 6, right I-beam fastening hook bars 7 and front I-beam fastening hook bars 8 are arranged with their heads and tails alternately overlapped in sequence, forming a square hoop on the same horizontal plane. The square hoop realizes the clamping and fixing of the frame column formwork 1 through the wooden keels 2 arranged vertically on the four surfaces. The structures of the left I-beam fastening hook bar 5, the rear I-beam fastening hook bar 6, the right I-beam fastening hook bar 7 and the front I-beam fastening hook bar 8 are exactly the same. The left I-beam fastening hook bar 5 is obtained by bending the end of a lying I-beam to form the head hook body of the hook bar. The hook body and the middle part of the bar body of the left I-beam fastening hook bar 5 are the web plates of the I-beam. The top flange plate of the left I-beam becomes the inner flange plate of the I-beam fastening hook bar, and the bottom flange plate of the left I-beam becomes the outer flange plate of the I-beam fastening hook bar. On the web plate of the head hook body, a pair of threaded through holes 16 with internal threads are correspondingly arranged. On the tail web plate 11 of the left I-beam fastening hook bar 5, a first row of long strip pin holes 14 and a second row of long strip pin holes 15 are respectively arranged. The two rows of long strip pin holes are arranged parallel to each other along the bar body direction of the fastening hook bar, and moreover, the first row of long strip pin holes 14 and the second row of long strip pin holes 15 are arranged with a half-hole pitch offset from each other. The inner flange plate 12 of the left I-beam fastening hook bar 5 abuts against the outer vertical surface of the wooden keel 2, thereby increasing the abutting area. In the long strip pin hole at the tail of the rear I-beam fastening hook bar 6 outside the hook connection lap joint between the head hook body of the left I-beam fastening hook bar 5 and the tail of the rear I-beam fastening hook bar 6, a long strip tapered wedge 9 is arranged. The long strip tapered wedge 9 abuts against the outer flange plate 13 of the left I-beam fastening hook bar 5, forming a rightward extrusion on the left I-beam fastening hook bar 5. In the long strip pin hole at the tail of the left I-beam fastening hook bar 5 outside the hook connection lap joint between the head hook body of the front I-beam fastening hook bar 8 and the tail of the left I-beam fastening hook bar 5, another long strip tapered wedge is arranged. The other long strip tapered wedge abuts against the outer flange plate of the front I-beam fastening hook bar 8, forming a backward extrusion on the front I-beam fastening hook bar 8. A top screw 10 is screwed in the threaded through hole 16. The lower end of the top screw 10 abuts against the upper end surface of the tail web plate of the rear I-beam fastening hook bar 6. A bottom screw is screwed in the threaded through hole below the head hook body of the left I-beam fastening hook bar 5 corresponding to the threaded through hole 16. The upper end of the bottom screw abuts against the bottom surface of the tail web plate of the rear I-beam fastening hook bar 6;If the threaded through-hole 16 and the lower threaded through-hole are exactly aligned with a certain long pin hole at the tail of the rear I-beam fastening hook rod 6, the lower end of the upper set screw 10 can sequentially pass through the threaded through-hole 16 and a certain long pin hole and then be screwed together with the lower threaded through-hole, achieving the purpose of fixedly connecting the head hook body of the left I-beam fastening hook rod 5 and the tail of the rear I-beam fastening hook rod 6 with one set screw.

[0026] The left I-beam fastening hook rod 5, the rear I-beam fastening hook rod 6, the right I-beam fastening hook rod 7, and the front I-beam fastening hook rod 8 that are sequentially overlapped end to end and staggered refer to that the opening of the head hook body of the left I-beam fastening hook rod 5 is arranged upward, that is, the head hook body is arranged above the hook rod body and hooks on the tail of the rear I-beam fastening hook rod 6; the opening of the head hook body of the rear I-beam fastening hook rod 6 is arranged downward and hooks on the tail of the right I-beam fastening hook rod 7; the opening of the head hook body of the right I-beam fastening hook rod 7 is arranged upward and hooks on the tail of the front I-beam fastening hook rod 8; the opening of the head hook body of the front I-beam fastening hook rod 8 is arranged upward and hooks on the tail of the front I-beam fastening hook rod 8, and the opening of the head hook body is arranged downward and hooks on the tail of the left I-beam fastening hook rod 5; this arrangement makes the rod part of the left I-beam fastening hook rod 5 and the rod part of the right I-beam fastening hook rod 7 in the same horizontal plane, and makes the rod part of the rear I-beam fastening hook rod 6 and the rod part of the front I-beam fastening hook rod 8 in the same horizontal plane, so as to ensure that the clamping hoops of the left and right templates are on the same horizontal plane, and the clamping hoops of the front and rear templates are on the same horizontal plane, preventing the square hoops from being distorted and causing the phenomenon of formwork bulging.

[0027] A construction method for a quickly installable and disassemblable formwork fastening system for concrete frame columns, characterized by including the following steps:

[0028] Step 1: According to the pre-marked positions of the fastening hoops for the concrete frame column formwork, set the left I-beam fastening hook rod 5 on the left side elevation of the wooden keel 2 on the left side elevation of the concrete frame column formwork, and make the inner flange 12 of the left I-beam fastening hook rod 5 abut against the outer side elevation of the wooden keel 2, so that the opening of the head hook body of the left I-beam fastening hook rod 5 is arranged upward; set the rear I-beam fastening hook rod 6 on the rear side elevation of the wooden keel 2 on the rear side elevation of the concrete frame column formwork, and make the inner flange 12 of the rear I-beam fastening hook rod 6 abut against the outer side elevation of the wooden keel 2, so that the opening of the head hook body of the rear I-beam fastening hook rod 6 is arranged downward, and make the tail of the rear I-beam fastening hook rod 6 pass through the head hook body of the left I-beam fastening hook rod 5; set the right I-beam fastening hook rod 7 on the right side elevation of the wooden keel 2 on the right side elevation of the concrete frame column formwork, make the inner flange 12 of the right I-beam fastening hook rod 7 abut against the outer side elevation of the wooden keel 2, so that the opening of the head hook body of the right I-beam fastening hook rod 7 is arranged upward, and make the tail of the right I-beam fastening hook rod 7 pass through the head hook body of the rear I-beam fastening hook rod 6; set the front I-beam fastening hook rod 8 on the front side elevation of the wooden keel 2 on the front side elevation of the concrete frame column formwork, make the inner flange 12 of the front I-beam fastening hook rod 8 abut against the outer side elevation of the wooden keel 2, and make the opening of the head hook body of the front I-beam fastening hook rod 8 arranged downward, and make the tail of the left I-beam fastening hook rod 5 pass through the head hook body of the front I-beam fastening hook rod 8;

[0029] Step 2: Horizontally move the left I-beam fastening hook rod 5 forward. After the head hook body of the left I-beam fastening hook rod 5 is hooked tightly with the tail of the rear I-beam fastening hook rod 6, insert the first positioning pin between the threaded through-hole 16 and the long strip pin hole at the tail of the rear I-beam fastening hook rod 6 corresponding to the threaded through-hole 16; at the same time, use the same method to insert the second positioning pin at the hooking joint between the head hook body of the rear I-beam fastening hook rod 6 and the tail of the right I-beam fastening hook rod 7, insert the third positioning pin at the hooking joint between the head hook body of the right I-beam fastening hook rod 7 and the tail of the front I-beam fastening hook rod 8, and insert the fourth positioning pin at the hooking joint between the head hook body of the front I-beam fastening hook rod 8 and the tail of the left I-beam fastening hook rod 5; thus, the preliminary fastening and positioning of the square hoop on the concrete frame column formwork are realized; through the abutting of the inner flange of the I-beam fastening hook rod on the outer side elevation of the wooden keel 2 and the connection of the four positioning pins, the square hoop is accurately positioned on the four outer side elevations of the frame column formwork 1. This operation step is programmed and simplified, overcoming the inconsistency of on-site construction personnel's operations;

[0030] Step 3: Insert the strip-shaped tapered wedge 9 into the long-strip pin hole at the tail of the rear I-beam fastening hook rod 6 outside the hooked connection lap between the head hook body of the left I-beam fastening hook rod 5 and the tail of the rear I-beam fastening hook rod 6, and make the first strip-shaped tapered wedge 9 abut against the outer flange plate 13 of the left I-beam fastening hook rod 5; insert the second strip-shaped tapered wedge into the long-strip pin hole at the tail of the right I-beam fastening hook rod 7 outside the hooked connection lap between the head hook body of the rear I-beam fastening hook rod 6 and the tail of the right I-beam fastening hook rod 7, and make the second strip-shaped tapered wedge abut against the outer flange plate of the rear I-beam fastening hook rod 6; insert the third strip-shaped tapered wedge into the long-strip pin hole at the tail of the front I-beam fastening hook rod 8 outside the hooked connection lap between the head hook body of the right I-beam fastening hook rod 7 and the tail of the front I-beam fastening hook rod 8, and make the third strip-shaped tapered wedge abut against the outer flange plate of the right I-beam fastening hook rod 7; insert the fourth strip-shaped tapered wedge into the long-strip pin hole at the tail of the left I-beam fastening hook rod 5 outside the hooked connection lap between the head hook body of the front I-beam fastening hook rod 8 and the tail of the left I-beam fastening hook rod 5, and make the fourth strip-shaped tapered wedge abut against the outer flange plate of the front I-beam fastening hook rod 8; the insertion of the four strip-shaped tapered wedges provides the preconditions for the fastening of the square hoop in the next step;

[0031] Step 4: Remove the first positioning pin and the third positioning pin arranged diagonally, and simultaneously tap the first long strip-shaped tapered wedge 9 and the third long strip-shaped tapered wedge downward with consistent force, so that the rod bodies of the left I-beam fastening hook rod 5 and the right I-beam fastening hook rod 7 are clamped on the left and right sides of the concrete frame column formwork in the left-right direction. When tapping the first long strip-shaped tapered wedge 9 downward, the wedge-shaped vertical surface on the right side of the first long strip-shaped tapered wedge 9 forms a squeezing force to the right on the head hook body of the left I-beam fastening hook rod 5. At the same time, as the first long strip-shaped tapered wedge 9 moves downward, it will generate a pulling force to the left on the tail of the rear I-beam fastening hook rod 6, and this pulling force makes the head hook body of the rear I-beam fastening hook rod 6 move to the left; similarly, when tapping the third long strip-shaped tapered wedge downward, the left vertical surface of the third long strip-shaped tapered wedge forms a squeezing force to the left. At the same time, as the third long strip-shaped tapered wedge moves downward, it will generate a pulling force to the right on the tail of the front I-beam fastening hook rod 8, and this pulling force makes the head hook body of the front I-beam fastening hook rod 8 move to the right; that is, simultaneously and with consistent force, tapping the first long strip-shaped tapered wedge 9 and the third long strip-shaped tapered wedge downward will make the left I-beam fastening hook rod 5 and the right I-beam fastening hook rod 7 move synchronously towards each other, playing the role of clamping the left and right side formworks of the frame column formwork 1; Connect the top screw in the threaded through hole 16, rotate the top screw so that the bottom end of the top screw abuts against the top surface of the tail web of the rear I-beam fastening hook rod 6. Connect the bottom screw in the threaded through hole corresponding to the threaded through hole 16 below, and rotate the bottom screw so that the top end of the bottom screw abuts against the bottom surface of the tail web of the rear I-beam fastening hook rod 6, realizing the fastening and fixing in the up-down direction at the hook joint between the head hook body of the left I-beam fastening hook rod 5 and the tail of the rear I-beam fastening hook rod 6; Connect the top and bottom screws in the same way in a pair of threaded through holes on the head hook body of the right I-beam fastening hook rod 7 respectively, so as to realize the fastening and fixing in the up-down direction at the hook joint between the head hook body of the right I-beam fastening hook rod 7 and the tail of the front I-beam fastening hook rod 8; After the left and right side formworks are clamped, further fix the hook joint in the up-down direction through the top and bottom screws, playing a double fixation on the hook joints of the two I-beam fastening hook rods, overcoming the defect that the long strip-shaped tapered wedge is prone to loosen due to vibration;

[0032] Step 5: Remove the second positioning pin and the fourth positioning pin, and simultaneously tap the second long strip-shaped tapered wedge and the fourth long strip-shaped tapered wedge, so that the rod body of the rear I-beam fastening hook rod 6 and the rod body of the front I-beam fastening hook rod 8 are clamped on the front and rear sides of the concrete frame column formwork in the front-rear direction; Connect upper and lower set screws respectively in a pair of threaded through holes of the head hook body of the rear I-beam fastening hook rod 6, so as to realize the fastening and fixing in the up-down direction of the connection between the head hook body of the rear I-beam fastening hook rod 6 and the tail hook of the right I-beam fastening hook rod 7; In a pair of threaded through holes on the head hook body of the front I-beam fastening hook rod 8, connect upper and lower set screws respectively in the same way, so as to realize the fastening and fixing in the up-down direction of the connection between the head hook body of the front I-beam fastening hook rod 8 and the tail hook of the left I-beam fastening hook rod 5.

[0033] Step 6: Along the up-down direction, construct each square hoop at the positions of the concrete frame column formwork fastening hoops marked in advance, and complete the construction of the entire concrete frame column formwork fastening system;

[0034] Step 7: Pour concrete into the frame column formwork 1 to form a concrete frame column;

[0035] Step 8: After the concrete in the poured concrete frame column has finally set, first remove the upper and lower set screws in each square hoop;

[0036] Step 9: Remove the long strip-shaped tapered wedges in each square hoop through the pin holes 17 at the top of the long strip-shaped tapered wedges 9;

[0037] Step 10: Remove and store each I-beam fastening hook rod in the square hoop for use in the reinforcement of the next frame column formwork.

[0038] The construction and removal of the fastening mechanism of the square hoop of the present invention are both programmed, the on-site operation is simple, and all accessories can be reused, greatly reducing the construction cost.

Claims

1. A fastening system for a concrete frame column formwork that can be quickly assembled and disassembled, comprising a frame column formwork (1), wooden keels (2) are arranged at intervals on the outer facade of the frame column formwork (1), main reinforcements (3) and stirrups (4) are arranged in the frame column formwork (1), and a left I-beam fastening hook rod (5), a rear I-beam fastening hook rod (6), a right I-beam fastening hook rod (7) and a front I-beam fastening hook rod (8) are arranged on the outer side of the wooden keel (2) and are staggered and overlapped in sequence head to tail to form a square clamp, the structure of the left I-beam fastening hook rod (5), the structure of the rear I-beam fastening hook rod (6), the structure of the right I-beam fastening hook rod (7) and the structure of the front I-beam fastening hook rod (8) are completely the same, and the characteristic is that: The left I-beam fastening hook rod (5) is obtained by bending one end of a horizontal I-beam to form a head hook body of the hook rod. A pair of threaded through holes (16) with internal threads are correspondingly arranged on the web of the head hook body. A first row of long pin holes (14) and a second row of long pin holes (15) are respectively arranged on the tail web (11) of the left I-beam fastening hook rod (5). The first row of long pin holes (14) and the second row of long pin holes (15) are respectively arranged on the tail web (11) of the left I-beam fastening hook rod (5). ) and the second row of long pin holes (15) are arranged at a half-hole spacing; the inner flange plate (12) of the left I-beam fastening hook rod (5) is abutted against the outer vertical surface of the wooden keel (2), and a long tapered wedge (9) is arranged in the tail long pin hole of the rear I-beam fastening hook rod (6) outside the hook connection overlap between the head hook body of the left I-beam fastening hook rod (5) and the tail of the rear I-beam fastening hook rod (6) ), a long tapered wedge (9) is abutted against the outer flange plate (13) of the left I-beam fastening hook rod (5); another long tapered wedge is provided in the tail long pin hole of the left I-beam fastening hook rod (5) outside the hook connection overlap between the head hook body of the front I-beam fastening hook rod (8) and the tail of the left I-beam fastening hook rod (5), and the other long tapered wedge is abutted against the front I-beam fastening hook rod (8) On the outer flange plate; an upper top screw (10) is screwed into the threaded through hole (16), and the lower end of the upper top screw (10) is connected to the upper end surface of the tail web of the rear I-beam fastening hook rod (6); a lower top screw is screwed into the threaded through hole below the head hook body of the left I-beam fastening hook rod (5) corresponding to the threaded through hole (16), and the upper end of the lower top screw is connected to the lower bottom surface of the tail web of the rear I-beam fastening hook rod (6).

2. A fast and detachable concrete frame column formwork fastening system according to claim 1, characterized in that: The left I-beam fastening hook rod (5), the rear I-beam fastening hook rod (6), the right I-beam fastening hook rod (7) and the front I-beam fastening hook rod (8) which are overlapped in an alternating manner from head to tail refer to that the opening of the head hook body of the left I-beam fastening hook rod (5) is arranged upwards and is hooked to the tail of the rear I-beam fastening hook rod (6); the opening of the head hook body of the rear I-beam fastening hook rod (6) is arranged downwards and is hooked to the tail of the right I-beam fastening hook rod (7); the opening of the head hook body of the right I-beam fastening hook rod (7) is arranged upwards , and hooked to the tail of the front I-beam fastening hook rod (8); the opening of the head hook body of the front I-beam fastening hook rod (8) is arranged upward and hooked to the tail of the left I-beam fastening hook rod (5); this arrangement enables the rod portion of the left I-beam fastening hook rod (5) and the rod portion of the right I-beam fastening hook rod (7) to be in the same horizontal plane, and enables the rod portion of the rear I-beam fastening hook rod (6) and the rod portion of the front I-beam fastening hook rod (8) to be in the same horizontal plane.

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