Synchronous erecting and reinforcing system for beam formworks on two sides of expansion joint

Abstract

The utility model discloses a synchronous erecting and reinforcing system for beam formworks on the two sides of an expansion joint. The beam formworks on the two sides of the expansion joint are synchronously and conveniently erected and rapidly disassembled. A notch platform (12) is arranged on a screw side arm at one end of a left split bolt (10), a hinge seat (13) is arranged at the outer side end of the notch platform, the lower end of the middle of a swing rod (14) is hinged to the hinge seat, the gravity center (15) of the swing rod (14) is arranged on the inner side of the hinge seat (13), and external threads (16) are arranged at the other end of the left split bolt (10). According to the left split bolt, one end with a swing rod (14) is arranged in a construction expansion joint (5) outside a left side concrete beam pouring joint inner vertical formwork (6), and one end with an external thread (16) is arranged on the outer side of a left side concrete beam pouring outer vertical formwork (7). And the left side concrete beam pouring outer vertical formwork and the left side concrete beam pouring seam inner vertical formwork (6) are oppositely pulled and fixed together.

Description

Technical Field

[0001] The utility model relates to a formwork system for cast-in-place concrete beams, in particular to a synchronous support and reinforcement system for beam formworks on both sides of an expansion joint. Background Art

[0002] In cast-in-place shear wall structures, expansion joints are sometimes provided between two adjacent concrete beams. During the pouring of the concrete beams on both sides of the expansion joints, it is often difficult to support and reinforce the beam formwork on both sides due to the limited space of the construction joints. Since effective beam formwork reinforcement measures cannot be taken, the beam formwork on both sides of the expansion joints is easily deformed, affecting the safety of the entire building structure. The existing construction method generally adopts a staggered pouring construction method, first pouring the concrete beam structure on one side of the expansion joint, removing the beam formwork on this side, and then supporting and pouring the concrete beam formwork on the other side. This construction method prolongs the construction time. The construction cycle is shortened and the construction management cost is increased. Another common construction method is to insert extruded boards into the expansion joints and use them to replace the outer formwork of the beam body, thereby achieving the purpose of pouring the beam structure on both sides of the expansion joint at the same time. However, when pouring concrete, it is difficult to ensure that the lateral pressure on both sides of the extruded board is consistent, which can easily cause the steel bars in the beam to shift. In addition, the formwork supported on both sides of the expansion joint forms a sandwich structure in which the formwork is sandwiched with the extruded board. After the concrete is poured, it is difficult to remove the formwork in the expansion joint due to the small space of the expansion joint, which not only causes a waste of formwork materials, but also affects the normal function of the expansion joint. Summary of the invention

[0003] The utility model provides a synchronous support and reinforcement system for beam templates on both sides of an expansion joint, which realizes the synchronous and convenient support and rapid disassembly of the beam templates on both sides of the expansion joint.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A synchronous support and reinforcement system for beam templates on both sides of an expansion joint comprises a left supporting column and a right supporting column, wherein a left concrete beam casting bottom template is arranged on the left supporting column, and a right concrete beam casting bottom template is arranged on the right supporting column, and a construction expansion joint is arranged between the upper part of the left concrete beam casting bottom template and the upper part of the right concrete beam casting bottom template, and an inner template for a left concrete beam casting joint and an outer template for a left concrete beam casting joint are arranged on the left concrete beam casting bottom template on the left side of the construction expansion joint, and an inner template for a right concrete beam casting joint and an outer template for a right concrete beam casting joint are arranged on the right concrete beam casting bottom template on the right side of the construction expansion joint; and a outer template for a right concrete beam casting joint and an inner template for a right concrete beam casting joint are arranged between the outer template for a left concrete beam casting and the inner template for a left concrete beam casting joint. There is a left tension bolt, and a right tension bolt is arranged between the inner formwork of the right concrete beam casting joint and the outer formwork of the right concrete beam casting; the structure of the left tension bolt is exactly the same as that of the right tension bolt; a notch platform is arranged on the screw side arm at one end of the left tension bolt, a hinge seat is arranged at the outer end of the notch platform, the middle lower end of the swing arm is hinged on the hinge seat, the center of gravity of the swing arm is arranged on the inner side of the hinge seat, and an external thread is arranged at the other end of the left tension bolt; the left tension bolt is arranged in a way that one end with the swing arm is arranged in the construction expansion joint outside the inner formwork of the left concrete beam casting joint, and the other end with the external thread is arranged on the outside of the outer formwork of the left concrete beam casting joint, so as to tension and fix the outer formwork of the left concrete beam casting joint and the inner formwork of the left concrete beam casting joint together.

[0006] A PVC sleeve is provided on the left tension bolt between the left concrete beam casting outer formwork and the left concrete beam casting joint inner formwork.

[0007] A pair of transverse back ribs of the inner formwork for the seam are arranged on the outer side of the inner formwork for the left concrete beam casting seam, and the swing arm is connected to the transverse back ribs of the inner formwork for the seam in an up-and-down vertical arrangement. An outer transverse back rib is arranged on the outer side of the outer formwork for the left concrete beam casting seam, and the end of the left tension bolt with an external thread passes through the outer transverse back ribs in turn and is screwed together with the nut.

[0008] The utility model can be applied to the erection and removal of templates at expansion joints where various spaces are insufficient, can improve construction efficiency and quality, and the templates are easy to reuse, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a structural schematic diagram of the left tension bolt 10 of the utility model;

[0011] Figure 3It is a structural schematic diagram when the end of the left tension bolt 10 penetrates into the construction expansion joint 5 and rotates 180 degrees;

[0012] Figure 4 It is a structural schematic diagram when the swing rod 14 of the left tension bolt 10 of the utility model is pulled and connected to the vertical template 6 in the left concrete beam casting joint. DETAILED DESCRIPTION

[0013] The utility model is described in detail below with reference to the accompanying drawings:

[0014] A synchronous support and reinforcement system for beam formworks on both sides of an expansion joint comprises a left supporting column 1 and a right supporting column 2, wherein a left concrete beam casting bottom formwork 3 is arranged on the left supporting column 1, and a right concrete beam casting bottom formwork 4 is arranged on the right supporting column 2, a construction expansion joint 5 is arranged between the upper part of the left concrete beam casting bottom formwork 3 and the upper part of the right concrete beam casting bottom formwork 4, and a left concrete beam casting joint inner formwork 6 and a left concrete beam casting outer formwork 7 are arranged on the left concrete beam casting bottom formwork 3 on the left side of the construction expansion joint 5, and a right concrete beam casting joint inner formwork 8 and a right concrete beam casting outer formwork 9 are arranged on the right side of the construction expansion joint 5; a left tension bolt 10 is arranged between the left concrete beam casting outer formwork 7 and the left concrete beam casting joint inner formwork 6, and a right tension bolt 11 is arranged on the right side of the construction expansion joint 5. A right tension bolt 11 is arranged between the inner formwork 8 of the side concrete beam casting joint and the outer formwork 9 of the right concrete beam casting, and the structure of the left tension bolt 10 is exactly the same as that of the right tension bolt 11; a notch platform 12 is arranged on the screw side arm at one end of the left tension bolt 10, and a hinge seat 13 is arranged at the outer end of the notch platform 12, the middle lower end of the swing arm 14 is hinged on the hinge seat 13, the center of gravity 15 of the swing arm 14 is arranged on the inner side of the hinge seat 13, and an external thread 16 is arranged at the other end of the left tension bolt 10; the left tension bolt is arranged in a way that one end with the swing arm 14 is arranged in the construction expansion joint 5 outside the inner formwork 6 of the left concrete beam casting joint, and the other end with the external thread 16 is arranged on the outer side of the left concrete beam casting outer formwork 7, so that the left concrete beam casting outer formwork 7 and the left concrete beam casting joint inner formwork 6 are pulled and fixed together.

[0015] A PVC sleeve 17 is provided on the left tension bolt 10 between the left concrete beam casting outer formwork 7 and the left concrete beam casting seam inner formwork 6.

[0016] A pair of transverse back ribs 18 of the inner seam formwork are arranged on the outer side surface of the inner seam formwork 6 of the left concrete beam casting seam, and the swing rod 14 is vertically arranged in an up-and-down manner against the transverse back ribs 18 of the inner seam formwork. An outer transverse back rib 19 is arranged on the outer side surface of the outer seam formwork 7 of the left concrete beam casting seam, and one end of the left tension bolt 10 with an external thread 16 passes through the outer transverse back ribs 19 in turn and is screwed together with the nut 20.

[0017] The steps for synchronously setting up the beam formwork on both sides of the expansion joint are as follows:

[0018] The first step is to pre-make aluminum templates that meet the use requirements according to the structural dimensions on both sides of the expansion joint on the construction drawings. The width of the template back rib should not be too wide, and sufficient space should be left for the ends of the tension bolts;

[0019] The second step is to customize the left tension bolt 10, set a notch platform 12 on the screw side arm at one end of the left tension bolt 10, set a hinge seat 13 at the outer end of the notch platform 12, and the middle lower end of the swing rod 14 is hinged on the hinge seat 13. The center of gravity 15 of the swing rod 14 is set on the inner side of the hinge seat 13. A weight block can be set at the inner end of the swing rod 14 to achieve the effect that the center of gravity 15 of the swing rod 14 is set on the inner side of the hinge seat 13. When the left tension bolt 10 is placed horizontally and the notch platform 12 is set upward, the inner end of the swing rod 14 is set on the notch platform 12. When the left tension bolt 10 is rotated 180 degrees and then placed horizontally, and the notch platform 12 is set downward, under the action of the weight block, the swing rod 14 rotates 90 degrees around the hinge seat 13 and is set in the up and down vertical direction;

[0020] Step 3: Support the left concrete beam casting bottom template 3 on the left supporting column 1, support the right concrete beam casting bottom template 4 on the right supporting column 2, support the left concrete beam casting joint inner template 6 and the left concrete beam casting outer template 7 on the left concrete beam casting bottom template 3, support the right concrete beam casting joint inner template 8 and the right concrete beam casting outer template 9 on the right concrete beam casting bottom template 4, form a construction expansion joint 5 between the left concrete beam casting joint inner template 6 and the right concrete beam casting joint inner template 8, set a PVC sleeve 17 between the left concrete beam casting joint inner template 6 and the left concrete beam casting outer template 7, and set another PVC sleeve between the right concrete beam casting joint inner template 8 and the right concrete beam casting outer template 9;

[0021] Step 4: Take the left tension bolt 10, and set the notched platform 12 on the left tension bolt 10 upward, so that the swing rod 14 is set horizontally; pass the end of the left tension bolt 10 with the swing rod 14 horizontally through the tension bolt through hole on the left concrete beam casting outer formwork 7, enter the PVC sleeve 17, and then pass through the tension bolt through hole of the left concrete beam casting seam inner formwork 6, so that the swing rod 14 is set on the right side of the horizontal back rib 18 of the seam inner formwork;

[0022] Step 5: Rotate the left tension bolt 10 by 180 degrees, and the swing rod 14 rotates 90 degrees under the action of gravity and is set in the vertical direction. Pull the left tension bolt 10 to the left, so that the swing rod 14 set in the vertical direction is close to the horizontal back rib 18 of the inner seam formwork; screw the nut 20 onto the left end external thread 16 of the left tension bolt 10, tighten the nut 20, and complete the tightening of the left tension bolt 10 to the left concrete beam casting outer formwork 7 and the left concrete beam casting seam inner formwork 6;

[0023] Step 6: Use the same method to complete the fastening of the right tension bolt 11 to the right concrete beam casting joint inner formwork 8 and the right concrete beam casting outer formwork 9;

[0024] Step 7: pour the concrete on both sides of the expansion joint 5. When the poured concrete reaches the demoulding condition, first remove the nut 20, move the left tension bolt 10 to the right, and then rotate the left tension bolt 10 180 degrees to set the notch platform 12 upward. The swing arm 14 rotates 90 degrees under the action of gravity, and after returning to the notch platform 12, it is arranged in a horizontal state. Pull the left tension bolt 10 to the left, pull the left tension bolt 10 out of the PVC sleeve 17, and remove the left concrete beam casting joint inner formwork 6 and the left concrete beam casting outer formwork 7; use the same method to remove the right tension bolt 11, the right concrete beam casting joint inner formwork 8 and the right concrete beam casting outer formwork 9;

[0025] The reinforcement and disassembly of the formwork on both sides of the above construction expansion joint 5 do not need to be carried out inside the construction expansion joint 5, making the reinforcement of the formwork on both sides of the construction expansion joint 5 more convenient, which not only improves the construction progress and quality on site, but also improves the reuse rate of the formwork and tension bolts.

Claims

1. A synchronous support reinforcement system for beam templates on both sides of an expansion joint, comprising a left supporting column (1) and a right supporting column (2), wherein a left concrete beam casting bottom template (3) is arranged on the left supporting column (1), and a right concrete beam casting bottom template (4) is arranged on the right supporting column (2), a construction expansion joint (5) is arranged between the upper part of the left concrete beam casting bottom template (3) and the upper part of the right concrete beam casting bottom template (4), and left concrete beam casting joint inner templates are arranged on the left concrete beam casting bottom template (3) on the left side of the construction expansion joint (5). The invention relates to a method for manufacturing a right concrete beam casting joint template (6) and a left concrete beam casting outer template (7); a right concrete beam casting joint inner template (8) and a right concrete beam casting outer template (9) are respectively arranged on the right concrete beam casting bottom template (4) on the right side of the construction expansion joint (5); a left tension bolt (10) is arranged between the left concrete beam casting joint outer template (7) and the left concrete beam casting joint inner template (6); and a right tension bolt (11) is arranged between the right concrete beam casting joint inner template (8) and the right concrete beam casting outer template (9); the method is characterized in that: The structure of the left tension bolt (10) is completely the same as that of the right tension bolt (11); a notch platform (12) is provided on the screw side arm at one end of the left tension bolt (10), a hinge seat (13) is provided at the outer end of the notch platform (12), the middle lower end of the swing rod (14) is hinged on the hinge seat (13), the center of gravity (15) of the swing rod (14) is arranged on the inner side of the hinge seat (13), and an external thread (16) is provided at the other end of the left tension bolt (10); the left tension bolt is arranged in a manner that one end with the swing rod (14) is arranged in the construction expansion joint (5) outside the left concrete beam casting joint inner formwork (6), and the other end with the external thread (16) is arranged on the outer side of the left concrete beam casting outer formwork (7), so that the left concrete beam casting outer formwork (7) and the left concrete beam casting joint inner formwork (6) are tensioned and fixed together.

2. The synchronous support and reinforcement system for beam formwork on both sides of the expansion joint according to claim 1 is characterized in that: A PVC sleeve (17) is provided on the left tension bolt (10) between the left concrete beam casting outer formwork (7) and the left concrete beam casting joint inner formwork (6).

3. The synchronous support and reinforcement system for beam formwork on both sides of the expansion joint according to claim 2 is characterized in that: A pair of transverse back ribs (18) of the seam inner formwork are arranged on the outer side of the left concrete beam casting seam inner formwork (6), and the swing rod (14) is vertically arranged in an up-and-down manner against the transverse back ribs (18) of the seam inner formwork. An outer transverse back rib (19) is arranged on the outer side of the left concrete beam casting outer formwork (7), and one end of the left tension bolt (10) with an external thread (16) passes through the outer transverse back ribs (19) in turn and is screwed together with a nut (20).

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