Method for forming reserved holes for cantilever connection bolts of climbing frame wall attachment in main beam

Abstract

The present invention discloses a method for forming reserved holes for connecting bolts of a cantilever of a climbing frame wall attachment in a main beam, which solves the problem that the reserved holes for the connecting bolts at the inner ends of the cantilever of the existing wall attachment are easily misaligned; the main beam concrete pouring formwork system is combined with a combined U-shaped bracket, two conical plastic rods are positioned and fixed on the upright column of the left L-shaped bracket, so that the spacing between the two conical plastic rods is equal to the spacing between the two connecting bolts on the cantilever of the climbing frame wall attachment, the U-shaped bracket is clamped between the left formwork, the bottom formwork and the right formwork of the beam, so that the right ends of the two conical plastic rods pass through the two holes on the left formwork, the main beam concrete pouring space and the through holes on the right formwork in sequence, and are then screwed together with the connecting nuts, so that the two conical plastic rods are firmly arranged between the formworks on both sides, and the main beam concrete is poured to form reserved holes for the connecting bolts of the cantilever of the wall attachment, thereby realizing accurate positioning of the reserved holes.

Description

Technical Field

[0001] The invention relates to a reserved hole in a cast-in-situ concrete main beam, and in particular to a forming mechanism for the reserved hole of a cantilever connecting bolt of a climbing frame wall attachment part in the main beam. Background Art

[0002] In the construction of the main frame of a high-rise building, the external frame generally adopts an all-steel climbing frame, which is used for the installation of the external protective device of the building main body; the guide rail of the all-steel climbing frame is connected to the outer end of the cantilever of the wall-attached part, and the inner end of the cantilever of the wall-attached part is fixed to the bolt set on the main beam that has been cast. The bolt is inserted into the pre-buried bolt hole on the main beam that has been cast; since the position of the two connecting bolts on the cantilever of the wall-attached part is fixed, the position of the two pre-buried bolt holes reserved on the main beam must be accurate so that they are aligned with the holes on the cantilever of the wall-attached part. The two connecting bolts can be accurately docked and connected together; in the existing technology, before pouring the concrete of the main beam, two PVC pipes are positioned and pre-buried between the templates on both sides of the pre-cast main beam. After pouring the concrete, two plug-in holes for the connecting bolts on the cantilever of the wall-mounted part are formed; but during the concrete pouring process, the two PVC pipes often shift, resulting in the subsequent installation of the cantilever of the climbing frame wall-mounted part being unable to proceed smoothly, and only secondary drilling operations can be carried out on the poured main beam, which easily damages the main beam structure. Summary of the Invention

[0003] The present invention provides a method for forming reserved holes for connecting bolts of a cantilever of a climbing frame wall attachment in a main beam, which solves the technical problem that the reserved holes for connecting bolts at the inner end of the cantilever of the existing wall attachment are prone to misalignment.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is to combine the main beam concrete pouring formwork system with the combined U-shaped bracket; the U-shaped bracket is composed of a left L-shaped bracket and a right L-shaped bracket by docking, and two conical plastic rods are positioned and fixed on the column of the left L-shaped bracket, so that the distance between the two conical plastic rods is equal to the distance between the two connecting bolts on the cantilever of the climbing frame wall attachment, and on the vertical formwork for pouring concrete of the main beam, the connection position of the two connecting bolts on the cantilever of the climbing frame wall attachment is located, and two conical plastic rods are provided at this position to pass through holes, and the left L-shaped bracket with the two conical plastic rods is positioned and connected to the right L-shaped bracket. The L-shaped frame assembly is docked on the three formworks for pouring concrete of the main beam, that is, the U-shaped bracket is clamped between the left formwork, bottom formwork and right formwork of the beam, so that the right ends of the two conical plastic rods pass through the two holes on the left formwork, the main beam concrete pouring space and the through holes on the right formwork in turn, and are screwed together with the connecting nuts, so that the two conical plastic rods are firmly set between the formworks on both sides, and the main beam concrete is poured to form reserved holes for the cantilever connecting bolts of the wall-mounted parts, thereby achieving accurate positioning of the reserved holes and laying the foundation for the subsequent installation of the cantilever connecting bolts of the climbing frame wall-mounted parts.

[0006] A positioning and forming mechanism for pre-embedded bolts and reserved holes for connecting the cantilever of a wall-attached part, comprising a left vertical template for casting the main beam, a bottom template for casting the main beam, and a right vertical template for casting the main beam. An upper conical plastic rod and a lower conical plastic rod are respectively provided on the left vertical template for casting the main beam, through a through hole for passing through the upper conical plastic rod and a lower conical plastic rod; a right vertical template for casting the main beam is respectively provided with a through hole for passing through the right end screw of the upper conical plastic rod and a through hole for passing through the right end screw of the lower conical plastic rod; a left vertical template is provided on the left side of the left vertical template for casting the main beam. The left steel column has an upper conical plastic rod and a lower conical plastic rod suspended horizontally on the right side of the left steel column. The right end of the upper conical plastic rod is provided with a screw at the right end of the upper conical plastic rod, and the right end of the lower conical plastic rod is provided with a screw at the right end of the lower conical plastic rod. The left horizontal channel steel is fixedly connected to the lower end of the left steel column. The left steel column and the left horizontal channel steel form a left L-shaped frame. The right steel column is provided on the right side of the right vertical template for casting the main beam. The right steel column is provided with right steel bars. The upper through hole of the column and the lower through hole of the right steel column, the right horizontal square steel is fixedly connected to the lower end of the right steel column, and the right steel column and the right horizontal square steel form a right L-shaped frame; the left L-shaped frame, along the direction from left to right, is close to the left facade of the left vertical template of the main beam casting, and the upper conical plastic rod passes through the through hole through the upper conical plastic rod to enter the main beam casting space, and the lower conical plastic rod passes through the through hole through the lower conical plastic rod to enter the main beam casting space; the right L-shaped frame, along the direction from left to right, is close to the left facade of the left vertical template of the main beam casting In the right-to-left direction, it is connected to the right side of the vertical formwork on the right side of the main beam casting; the upper screw at the right end of the upper conical plastic rod passes through the screw at the right end of the upper conical plastic rod, passes through the through hole and the upper through hole of the right steel column, and is screwed together with a nut; the lower screw at the right end of the lower conical plastic rod passes through the screw at the right end of the lower conical plastic rod, passes through the through hole and the lower through hole of the right steel column, and is screwed together with another nut; after the left horizontal channel steel and the right horizontal square steel are plugged together, the left L-shaped frame and the right L-shaped frame form a U-shaped bracket.

[0007] An upper left groove and a lower left groove are respectively provided on the right side facade of the left steel column, an upper left through hole is provided in the upper left groove, and a lower left through hole is provided in the lower left groove; a left end screw of the lower conical plastic rod is provided on the left side facade of the lower conical plastic rod, and a left end screw of the upper conical plastic rod is provided on the left side facade of the upper conical plastic rod; the left side facade of the lower conical plastic rod is abutted against the bottom surface of the lower left groove, the left end screw of the lower conical plastic rod passes through the lower left long through hole and is screwed together with the lower left nut; the left side facade of the upper conical plastic rod is abutted against the bottom surface of the upper left groove, the left end screw of the upper conical plastic rod passes through the upper left long through hole and is screwed together with the upper left nut.

[0008] Channel steel pin plug-in holes are arranged at intervals on the left horizontal channel steel, and square steel pin plug-in holes are arranged at intervals on the right horizontal square steel. Connecting pins are inserted between the corresponding channel steel pin plug-in holes and square steel pin plug-in holes.

[0009] A method for forming holes reserved for connecting bolts of a cantilever of a climbing frame wall attachment in a main beam, comprising: forming a left vertical formwork for casting the main beam, a bottom formwork for casting the main beam, and a right vertical formwork for casting the main beam; an upper conical plastic rod passing through a through hole and a lower conical plastic rod passing through a through hole are respectively provided on the left vertical formwork for casting the main beam; and a right vertical formwork for casting the main beam is respectively provided with a through hole for a screw at the right end of the upper conical plastic rod passing through a through hole and a screw at the right end of the lower conical plastic rod passing through a through hole; the spacing between the through hole through which the upper conical plastic rod passes and the through hole through which the lower conical plastic rod passes is equal to the spacing between two connecting bolts of the cantilever of the climbing frame wall attachment; and characterized by the following steps:

[0010] The first step is to make the left L-shaped frame and the right L-shaped frame respectively. The specific process is as follows:

[0011] A left steel column is manufactured. An upper left groove and a lower left groove are respectively provided on the right side of the left steel column. An upper left long through hole is provided in the upper left groove, and a lower left long through hole is provided in the lower left groove. A left horizontal channel steel is welded to the lower end of the left steel column. Through holes for inserting channel steel pins are provided at intervals on the left horizontal channel steel to obtain a left L-shaped frame.

[0012] Make a right steel column, set an upper through hole of the right steel column and a lower through hole of the right steel column on the right steel column, fix the right horizontal square steel at the lower end of the right steel column, and the right steel column and the right horizontal square steel form a right L-shaped frame;

[0013] Make a lower conical plastic rod, fix the left end screw of the lower conical plastic rod on the left side of the lower conical plastic rod, and fix the right end screw of the lower conical plastic rod on the right side of the lower conical plastic rod; use the same method to make an upper conical plastic rod, the structure of the upper conical plastic rod is exactly the same as that of the lower conical plastic rod;

[0014] Step 2: Place the left side of the lower conical plastic rod against the bottom surface of the lower left groove, and insert the left end screw of the lower conical plastic rod into the lower left long hole; place the left side of the upper conical plastic rod against the bottom surface of the upper left groove, and insert the left end screw of the upper conical plastic rod into the upper left long hole; adjust the distance between the lower conical plastic rod and the upper conical plastic rod so that the distance between the lower conical plastic rod and the upper conical plastic rod is equal to the distance between the two connecting bolts of the cantilever of the climbing frame wall attachment, and fix the lower conical plastic rod to the left steel column with the lower left nut; fix the upper conical plastic rod to the left steel column with the upper left nut;

[0015] Step 3: Place the right L-shaped frame against the right side of the main beam casting template, so that the right end screw of the upper conical plastic rod passes through the through hole and aligns with the upper through hole of the right steel column, and the right end screw of the lower conical plastic rod passes through the through hole and aligns with the lower through hole of the right steel column;

[0016] The fourth step is to place the left L-shaped frame with two tapered plastic rods assembled in the second step against the left vertical template of the main beam casting from left to right. At the same time, the upper tapered plastic rod passes through the through hole through the upper tapered plastic rod and enters the main beam casting space, and the lower tapered plastic rod passes through the through hole through the lower tapered plastic rod and enters the main beam casting space. In addition, the upper screw at the right end of the upper tapered plastic rod passes through the through hole of the right end screw of the upper tapered plastic rod and the upper through hole of the square steel column and is screwed together with a nut; the lower screw at the right end of the lower tapered plastic rod passes through the through hole of the right end screw of the lower tapered plastic rod and the lower through hole of the right square steel column and is screwed together with another nut; after the left horizontal channel steel and the right horizontal square steel are plugged together, insert the connecting pin between the corresponding pin plug-in through hole on the channel steel and the pin plug-in through hole on the square steel;

[0017] Step 5: pour concrete in the main beam pouring space composed of the left vertical formwork for main beam pouring, the bottom formwork for main beam pouring and the right vertical formwork for main beam pouring;

[0018] Step 6. After the concrete to be poured has initially set, first remove the nut on the lower screw rod at the right end of the lower conical plastic rod and the upper left nut, and then remove the nut on the upper screw rod at the right end of the upper conical plastic rod; then remove the corresponding connecting pins inserted between the pin plug-in holes on the channel steel and the pin plug-in holes on the square steel;

[0019] Step 7. Move the left L-shaped frame horizontally to the left to pull the lower conical plastic rod and the upper conical plastic rod out of the initial setting concrete, forming the upper reserved hole and the lower reserved hole for the cantilever connection bolts of the climbing frame wall attachment.

[0020] The present invention arranges a U-shaped bracket on the main concrete beam casting template, and positions and fixes two pre-buried conical plastic rods between the bracket and the template, thereby overcoming the displacement caused by the impact of the two conical plastic rods during concrete pouring, and improving the positioning accuracy of the reserved holes for the cantilever connecting bolts of the climbing frame wall attachment parts. The U-shaped bracket and accessories can be reused, thereby improving work efficiency and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the combination of the U-shaped bracket and the main beam casting template of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the U-shaped bracket and the main beam casting template of the present invention after being assembled in place;

[0023] Figure 3 It is a structural schematic diagram of the left L-shaped frame of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the lower conical plastic rod 8 of the present invention;

[0025] Figure 5 This is a diagram showing the matching relationship between the two tapered plastic rods and the left L-shaped frame of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the right L-shaped frame of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the reserved holes for the cantilever connection bolts of the two wall-attached parts in the main beam of the present invention. Implementation Method

[0028] The present invention is described in detail below with reference to the accompanying drawings:

[0029] A positioning and forming mechanism for pre-embedded bolts and pre-reserved holes for connecting the cantilever of the wall-attached part, comprising a left vertical template 18 for casting the main beam, a bottom template 20 for casting the main beam, and a right vertical template 19 for casting the main beam. An upper conical plastic rod is provided on the left vertical template 18 for casting the main beam, and a lower conical plastic rod is provided on the right vertical template 19 for casting the main beam, respectively. A through hole 21 for passing the upper conical plastic rod and a through hole 22 for passing the lower conical plastic rod are provided on the right vertical template 19 for casting the main beam, respectively. A through hole 23 for passing the right end screw of the upper conical plastic rod and a through hole 24 for passing the right end screw of the lower conical plastic rod are provided on the left side of the left vertical template 18 for casting the main beam. The left steel column 1 has an upper conical plastic rod 12 and a lower conical plastic rod 8 cantilevered horizontally on the right side of the left steel column 1. The right end of the upper conical plastic rod 12 is provided with a screw at the right end of the upper conical plastic rod, and the right end of the lower conical plastic rod 8 is provided with a screw at the right end of the lower conical plastic rod 10. The left horizontal channel steel 2 is fixedly connected to the lower end of the left steel column 1. The left steel column 1 and the left horizontal channel steel 2 form a left L-shaped frame. The right steel column 13 is provided on the right side of the right vertical template 19 of the main beam casting. The right steel column 13 is provided with a right The upper through hole 15 of the steel column and the lower through hole 16 of the right steel column, the right horizontal square steel 14 is fixedly connected to the lower end of the right steel column 13, and the right steel column 13 and the right horizontal square steel 14 form a right L-shaped frame; the left L-shaped frame is connected to the left side of the left side vertical template 18 of the main beam casting from left to right, and the upper tapered plastic rod 12 passes through the through hole 21 through the upper tapered plastic rod to enter the main beam casting space, and the lower tapered plastic rod 8 passes through the through hole 22 through the lower tapered plastic rod to enter the main beam casting space; the right L-shaped frame, Along the direction from right to left, it is connected to the right side facade of the right side vertical template 19 of the main beam casting; the upper screw at the right end of the upper conical plastic rod 12 passes through the right end screw of the upper conical plastic rod through the through hole 23 and the upper through hole 15 of the right steel column and is screwed together with a nut, and the lower screw 10 at the right end of the lower conical plastic rod 8 passes through the right end screw of the lower conical plastic rod through the through hole 24 and the lower through hole 16 of the right steel column in sequence and is screwed together with another nut; after the left horizontal channel steel 2 and the right horizontal square steel 14 are plugged together, the left L-shaped frame and the right L-shaped frame form a U-shaped bracket.

[0030] An upper left groove 5 and a lower left groove 3 are respectively provided on the right side facade of the left steel column 1, an upper left through hole 6 is provided in the upper left groove 5, and a lower left through hole 4 is provided in the lower left groove 3; a lower conical plastic rod 8 is provided with a left end screw 9 on the left side facade, and an upper conical plastic rod 12 is provided with a left end screw; the left side facade of the lower conical plastic rod 8 is abutted against the groove bottom surface of the lower left groove 3, and the left end screw 9 of the lower conical plastic rod passes through the lower left long through hole 4 and is screwed together with the lower left nut 11; the left side facade of the upper conical plastic rod 12 is abutted against the groove bottom surface of the upper left groove 5, and the left end screw of the upper conical plastic rod passes through the upper left long through hole 6 and is screwed together with the upper left nut.

[0031] Channel steel pin plug-in holes 7 are arranged at intervals on the left horizontal channel steel 2, and square steel pin plug-in holes 17 are arranged at intervals on the right horizontal square steel 14. Connecting pins are inserted between the corresponding channel steel pin plug-in holes 7 and square steel pin plug-in holes 17.

[0032] A method for forming holes reserved for connecting bolts of a cantilever of a climbing frame wall attachment in a main beam, comprising: a left vertical template 18 for casting the main beam, a bottom template 20 for casting the main beam, and a right vertical template 19 for casting the main beam; an upper conical plastic rod passing through a through hole 21 and a lower conical plastic rod passing through a through hole 22 are respectively provided on the left vertical template 18 for casting the main beam; a right vertical template 19 for casting the main beam is respectively provided with a through hole 23 for the right end screw of the upper conical plastic rod passing through a through hole 24 for the right end screw of the lower conical plastic rod passing through; the spacing between the through hole 21 and the through hole 22 of the upper conical plastic rod is equal to the spacing between the two connecting bolts of the cantilever of the climbing frame wall attachment; and the method is characterized by the following steps:

[0033] The first step is to make the left L-shaped frame and the right L-shaped frame respectively. The specific process is as follows:

[0034] A left steel column 1 is fabricated. An upper left groove 5 and a lower left groove 3 are respectively provided on the right side of the left steel column 1. An upper left elongated through hole 6 is provided in the upper left groove 5, and a lower left elongated through hole 4 is provided in the lower left groove 3. A left horizontal channel steel 2 is welded to the lower end of the left steel column 1. Channel steel upper pin insertion holes 7 are provided at intervals on the left horizontal channel steel 2 to obtain a left L-shaped frame.

[0035] A right steel column 13 is manufactured, and an upper through hole 15 and a lower through hole 16 are respectively provided on the right steel column 13. A right horizontal square steel 14 is fixedly connected to the lower end of the right steel column 13. The right steel column 13 and the right horizontal square steel 14 form a right L-shaped frame;

[0036] A lower conical plastic rod 8 is manufactured. A screw 9 at the left end of the lower conical plastic rod is fixedly installed on the left side of the lower conical plastic rod 8. A screw 10 at the right end of the lower conical plastic rod is fixedly installed on the right side of the lower conical plastic rod 8. An upper conical plastic rod 12 is manufactured in the same manner. The structure of the upper conical plastic rod 12 is exactly the same as that of the lower conical plastic rod 8.

[0037] Step 2: Place the left side of the lower conical plastic rod 8 against the bottom surface of the lower left groove 3, and insert the left end screw 9 of the lower conical plastic rod into the lower left long strip through hole 4; place the left side of the upper conical plastic rod 12 against the bottom surface of the upper left groove 5, and insert the left end screw of the upper conical plastic rod into the upper left long strip through hole 6; adjust the distance between the lower conical plastic rod 8 and the upper conical plastic rod 12 so that the distance between the lower conical plastic rod 8 and the upper conical plastic rod 12 is equal to the distance between the two connecting bolts of the cantilever of the climbing frame wall attachment, and fix the lower conical plastic rod 8 to the left steel column 1 through the lower left nut 11; fix the upper conical plastic rod 12 to the left steel column 1 through the upper left nut;

[0038] Step 3: Place the right L-shaped frame against the right side of the main beam casting right side template 19, so that the right end screw of the upper conical plastic rod passes through the through hole 23 and is aligned with the upper through hole 15 of the right steel column, and the right end screw of the lower conical plastic rod passes through the through hole 24 and is aligned with the lower through hole 16 of the right steel column;

[0039] The fourth step is to place the left L-shaped frame with two tapered plastic rods assembled in the second step against the left vertical template 18 of the main beam casting from left to right. At the same time, the upper tapered plastic rod 12 passes through the through hole 21 through the upper tapered plastic rod and enters the main beam casting space. The lower tapered plastic rod 8 passes through the through hole 22 through the lower tapered plastic rod and enters the main beam casting space. In addition, the screw on the right end of the upper tapered plastic rod 12 passes through the upper and lower screw holes in turn. The screw at the right end of the tapered plastic rod passes through the through hole 23 and the upper through hole 15 of the square steel column and is screwed together with a nut; the lower screw 10 at the right end of the lower tapered plastic rod 8 passes through the through hole 24 of the right end of the lower tapered plastic rod and the lower through hole 16 of the right square steel column and is screwed together with another nut; after the left horizontal channel steel 2 and the right horizontal square steel 14 are plugged together, a connecting pin is inserted between the corresponding pin plug-in through hole 7 on the channel steel and the pin plug-in through hole 17 on the square steel;

[0040] Step 5: pour concrete 25 in the main beam pouring space composed of the main beam pouring left side formwork 18, the main beam pouring bottom formwork 20 and the main beam pouring right side formwork 19;

[0041] Step 6: After the concrete 25 to be poured has initially set, first remove the nut on the lower screw 10 at the right end of the lower conical plastic rod 8 and the upper left nut, and then remove the nut on the upper screw at the right end of the upper conical plastic rod 12; then remove the corresponding connecting pins inserted between the pin plug-in hole 7 on the channel steel and the pin plug-in hole 17 on the square steel;

[0042] Step 7: Move the left L-shaped frame horizontally to the left to pull the lower tapered plastic rod 8 and the upper tapered plastic rod 12 out of the initial setting concrete 25, forming the upper reserved hole 26 and the lower reserved hole 27 for the cantilever connection bolt of the climbing frame wall attachment.

Claims

1. A method for forming holes reserved for connecting bolts of a cantilever of a climbing frame wall attachment in a main beam, comprising a left vertical template (18) for casting the main beam, a bottom template (20) for casting the main beam, and a right vertical template (19) for casting the main beam, wherein an upper conical plastic rod is provided with a through hole (21) and a lower conical plastic rod is provided with a through hole (22), and a right vertical template (19) for casting the main beam is provided with a right screw rod of the upper conical plastic rod is provided with a through hole (23) and a right screw rod of the lower conical plastic rod is provided with a through hole (24), wherein the spacing between the through hole (21) and the through hole (22) of the upper conical plastic rod is equal to the spacing between the two connecting bolts of the cantilever of the climbing frame wall attachment; and wherein the method comprises the following steps: Follow these steps: The first step is to make the left L-shaped frame and the right L-shaped frame respectively. The specific process is as follows: A left steel column (1) is manufactured, and an upper left groove (5) and a lower left groove (3) are respectively provided on the right side elevation of the left steel column (1), an upper left long strip through hole (6) is provided in the upper left groove (5), and a lower left long strip through hole (4) is provided in the lower left groove (3), a left horizontal channel steel (2) is welded to the lower end of the left steel column (1), and channel steel upper pin insertion through holes (7) are provided at intervals on the left horizontal channel steel (2), thereby obtaining a left L-shaped frame; A right steel column (13) is manufactured, and a right steel column upper through hole (15) and a right steel column lower through hole (16) are respectively provided on the right steel column (13). A right horizontal square steel (14) is fixedly connected to the lower end of the right steel column (13). The right steel column (13) and the right horizontal square steel (14) form a right L-shaped frame; A lower conical plastic rod (8) is manufactured, and a screw rod (9) at the left end of the lower conical plastic rod is fixedly arranged on the left side elevation of the lower conical plastic rod (8), and a lower screw rod (10) at the right end of the lower conical plastic rod is fixedly arranged on the right side elevation of the lower conical plastic rod (8); an upper conical plastic rod (12) is manufactured using the same method, and the structure of the upper conical plastic rod (12) is exactly the same as that of the lower conical plastic rod (8); Step 2: Place the left side of the lower conical plastic rod (8) against the bottom surface of the groove of the lower left groove (3), and insert the left end screw (9) of the lower conical plastic rod into the lower left long strip through hole (4); Place the left side of the upper conical plastic rod (12) against the bottom surface of the groove of the upper left groove (5), and insert the left end screw of the upper conical plastic rod into the upper left long strip through hole (6); Adjust the spacing between the lower conical plastic rod (8) and the upper conical plastic rod (12) so that the spacing between the lower conical plastic rod (8) and the upper conical plastic rod (12) is equal to the spacing between the two connecting bolts of the cantilever of the climbing frame wall attachment, and fix the lower conical plastic rod (8) to the left steel column (1) through the lower left nut (11); Fix the upper conical plastic rod (12) to the left steel column (1) through the upper left nut; Step 3: Place the right L-shaped frame against the right side of the main beam casting template (19), so that the screw rod at the right end of the upper conical plastic rod passes through the through hole (23) and is aligned with the upper through hole (15) of the right steel column, and the screw rod at the right end of the lower conical plastic rod passes through the through hole (24) and is aligned with the lower through hole (16) of the right steel column; Step 4: Place the left L-shaped frame with two conical plastic rods assembled in the second step against the left vertical template (18) of the main beam casting from left to right. At the same time, the upper conical plastic rod (12) passes through the through hole (21) of the upper conical plastic rod and enters the main beam casting space. The lower conical plastic rod (8) passes through the through hole (22) of the lower conical plastic rod and enters the main beam casting space. In addition, the screw on the right end of the upper conical plastic rod (12) passes through the upper conical plastic rod in sequence. The screw rod at the right end of the rubber stick passes through the through hole (23) and the through hole (15) on the upper part of the right steel column and is screwed together with a nut; the lower screw rod (10) at the right end of the lower conical plastic stick passes through the through hole (24) and the through hole (16) on the lower part of the right steel column in turn and is screwed together with another nut; after the left horizontal channel steel (2) and the right horizontal square steel (14) are plugged together, a connecting pin is inserted between the corresponding pin plugging through hole (7) on the channel steel and the pin plugging through hole (17) on the square steel; Step 5: pouring concrete (25) in the main beam pouring space composed of the main beam pouring left side vertical formwork (18), the main beam pouring bottom formwork (20) and the main beam pouring right side vertical formwork (19); Step 6: After the concrete (25) to be poured has initially solidified, first remove the nut on the lower screw (10) at the right end of the lower conical plastic rod and the nut on the upper screw at the right end of the upper conical plastic rod (12); then remove the corresponding connecting pins inserted between the pin plug-in holes (7) on the channel steel and the pin plug-in holes (17) on the square steel; Step 7: Move the left L-shaped frame horizontally to the left so that the lower conical plastic rod (8) and the upper conical plastic rod (12) are pulled out from the initial setting concrete (25), forming the upper reserved hole (26) and the lower reserved hole (27) for the cantilever connection bolt of the climbing frame wall attachment.

Images