Post-cast strip bottom formwork hanging device and construction method thereof

Abstract

The invention relates to building construction, in particular to a post-cast strip bottom formwork hoisting device and a construction method thereof. The bottom formwork is arranged at the bottom of the post-cast strip and comprises a water stop screw rod, an upper beam, supporting rods and a lower beam, the supporting rods are symmetrically and fixedly connected to the two ends of the bottom face of the upper beam, the lower beam is arranged at the bottom of the bottom formwork, the upper beam and the lower beam are provided with bolt holes for the water stop screw rod to penetrate through, and the water stop screw rod sequentially penetrates through the upper beam, the bottom formwork and the lower beam. The upper cross beam and the lower cross beam are connected through the water stop screws, and the bottom formwork is made to be tightly attached to the bottom faces of the concrete structures on the two sides of the post-cast strip. According to the method, the time for fixing the post-cast strip bottom formwork is remarkably shortened, the working efficiency is improved, a post-cast strip bottom support does not need to be manually erected, and the stability and safety are high in the concrete pouring process; the device is simple in structure, convenient to use, low in manufacturing cost, capable of being manufactured by welding square steel and steel pipes on a construction site and high in practicability.

Description

Technical Field

[0001] The invention relates to building construction, in particular to a post-casting strip bottom template hanging formwork device and a construction method thereof. Background Art

[0002] Post-cast strips are concrete strips set aside at the corresponding positions of the foundation slab, wall, and beam in accordance with design or construction specifications to prevent harmful cracks that may occur in reinforced concrete structures due to uneven shrinkage or settlement. Post-cast strips temporarily divide the structure into several parts. After the internal shrinkage of the components, the construction joint concrete is poured again after a period of time to connect the structure into a whole. The pouring time of the post-cast strip should be selected when the temperature is relatively low. Cement or concrete with a small amount of aluminum powder added to cement can be poured. Its strength grade should be one level higher than the strength of the component to prevent cracks between the new and old concrete and form weak parts. The post-cast strip is extremely important. At present, when the bottom formwork of the post-cast strip of the building roof is supported, brackets and vertical poles are set from the bottom of the bottom formwork. The construction volume is large and the efficiency is low, which easily causes quality problems of the post-cast strip. Summary of the invention

[0003] The present invention aims to solve the above technical problems, thereby providing a post-casting strip bottom template hanging formwork device and a construction method thereof, so as to improve construction efficiency and construction quality.

[0004] The present invention solves the technical problem and adopts the following technical solution: A post-cast strip bottom formwork hanging device, the bottom formwork is placed at the bottom of the post-cast strip, includes a waterstop screw, an upper crossbeam, a support rod and a lower crossbeam, the two ends of the bottom surface of the upper crossbeam are symmetrically fixed with support rods, the lower crossbeam is placed at the bottom of the bottom formwork, the upper crossbeam and the lower crossbeam are provided with bolt holes for passing the waterstop screws, the waterstop screws pass through the upper crossbeam, the bottom formwork and the lower crossbeam in sequence, the upper crossbeam and the lower crossbeam are connected by the waterstop screws and the bottom formwork is tightly attached to the bottom surface of the concrete structure on both sides of the post-cast strip.

[0005] A construction method for a post-casting strip bottom template hanging formwork device comprises the following steps: S1. Multiple upper beams and support rods are arranged on the top surface of the concrete structure on both sides of the post-casting belt, and the support rods are erected on the concrete structure; S2. Support the bottom formwork, which is located on the bottom surface of the concrete structure; S3. A lower crossbeam is arranged on the bottom surface of the bottom template; S4. A water-stop screw is inserted into the bolt hole of the upper crossbeam, and the lower end of the water-stop screw passes through the bottom template and the lower crossbeam in sequence; S5. Tighten the nut and the water stop screw to tighten the lower beam and the bottom formwork, so that the bottom formwork is close to the bottom surface of the concrete structure; S6. Pour the post-cast joint concrete.

[0006] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: 1) Significantly shorten the time for fixing the bottom formwork of the post-casting belt, improve work efficiency, and do not need to manually set up the bottom bracket of the post-casting belt. The concrete pouring process has good stability and high safety; 2) It has a simple structure, is easy to use, and has a low production cost. It can be welded and made using square steel and steel pipes at the construction site, making it highly practical.

[0007] Further, the optimization scheme of the present invention is: The distance between the two support rods is greater than the width of the post-casting strip.

[0008] The lower ends of the two support rods are pressed onto the top surfaces of the concrete structures on both sides of the post-casting strip.

[0009] The support rod is a round tube or a round rod.

[0010] The upper cross beam and the lower cross beam are square steel or square tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of an embodiment of the present invention; Figure 2 A schematic diagram of an upper crossbeam and a support rod according to an embodiment of the present invention; Figure 3 A schematic diagram of a lower crossbeam according to an embodiment of the present invention; Figure 4 A schematic diagram of a water-stop screw according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the construction and installation of an embodiment of the present invention; Figure 6 for Figure 5 Left view of .

[0012] In the figure: upper beam 1; support rod 2; lower beam 3; water stop screw 4; post-cast strip 5; concrete structure 6; bottom formwork 7. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0015] See also Figure 1-Figure 4 This embodiment provides a post-cast strip bottom template hanging formwork device, which is mainly composed of an upper crossbeam 1, a support rod 2, a lower crossbeam 3 and a water-stop screw 4. The upper crossbeam 1 is horizontally arranged, and it is made of square steel or square tube. The two ends of the bottom surface of the upper crossbeam 1 are symmetrically welded with support rods 2. The upper crossbeam 1 and the support rod 2 are an integrated structure. The support rod 2 is vertically arranged and perpendicular to the upper crossbeam 1. The support rod 2 is made of round tube or round steel. The distance between the two support rods 2 is greater than the width of the post-cast strip 5. When in use, the lower end of the support rod 2 is pressed against the top surface of the concrete structure 6 on both sides of the post-cast strip 5.

[0016] The lower cross beam 3 is horizontally placed below the support rod 2. The lower cross beam 3 is made of square steel or square tube. The upper cross beam 1 and the lower cross beam 3 are symmetrically provided with two bolt holes, and two water-stop screws 4 are vertically penetrated in the bolt holes. When in use, the lower cross beam 3 moves the bottom surface of the bottom template 7, and the water-stop screws 4 are tightened to make the bottom template 7 close to the bottom surface of the concrete structure 6 on both sides of the post-casting strip 5.

[0017] A construction method for a post-casting strip bottom template hanging formwork device is carried out according to the following steps ( Figure 5 , Figure 6 shown): S1. A plurality of upper cross beams 1 and support rods 2 are arranged on the top surface of the concrete structure 6 on both sides of the post-cast zone 5, and the support rods 2 are erected on the concrete structure.

[0018] S2. Support the bottom formwork 7, which is located at the bottom of the post-casting strip 5 and has two sides located at the bottom surface of the concrete structure 6.

[0019] S3. A lower cross beam 3 is arranged on the bottom surface of the bottom template 7, and the support rods 2 are arranged horizontally.

[0020] S4. A water-stop screw 4 is inserted into the bolt hole of the upper cross beam 1, and the lower end of the water-stop screw 4 passes through the bolt holes of the bottom template 7 and the lower cross beam 3 in sequence.

[0021] S5. Tighten the nut, and the water-stop screw 4 tightens the lower beam 3 and the bottom formwork 7. The lower end of the support rod 2 is pressed against the top surface of the concrete structure 6 on both sides of the post-cast strip 5, and both sides of the bottom formwork 7 are close to the bottom surface of the concrete structure 6.

[0022] S6, pouring concrete in the post-cast zone 5.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A bottom template hanging device for a post-casting strip, the bottom template is placed at the bottom of the post-casting strip, including a water-stop screw, characterized in that: It also includes an upper crossbeam, a support rod and a lower crossbeam, the two ends of the bottom surface of the upper crossbeam are symmetrically fixed with support rods, the lower crossbeam is placed at the bottom of the bottom template, the upper crossbeam and the lower crossbeam are provided with bolt holes for passing waterstop screws, the waterstop screws pass through the upper crossbeam, the bottom template and the lower crossbeam in sequence, the upper crossbeam and the lower crossbeam are connected by the waterstop screws and the bottom template is tightly attached to the bottom surface of the concrete structure on both sides of the post-cast strip.

2. The post-casting strip bottom template hanging formwork device according to claim 1 is characterized in that: The distance between the two support rods is greater than the width of the post-casting strip.

3. The post-casting strip bottom template hanging mold device according to claim 1 is characterized in that: The lower ends of the two support rods are pressed onto the top surfaces of the concrete structures on both sides of the post-casting strip.

4. The post-casting strip bottom formwork hanging device according to claim 1 is characterized in that: The support rod is a round tube or a round rod.

5. The post-casting strip bottom template hanging mold device according to claim 1 is characterized in that: The upper cross beam and the lower cross beam are square steel or square tube.

6. A construction method for the post-casting strip bottom template hanging formwork device according to any one of claims 1 to 5, comprising the following steps: S1. Multiple upper beams and support rods are arranged on the top surface of the concrete structure on both sides of the post-casting belt, and the support rods are erected on the concrete structure; S2. Support the bottom formwork, which is located on the bottom surface of the concrete structure; S3. A lower crossbeam is arranged on the bottom surface of the bottom template; S4. A water-stop screw is inserted into the bolt hole of the upper crossbeam, and the lower end of the water-stop screw passes through the bottom template and the lower crossbeam in sequence; S5. Tighten the nut and the water stop screw to tighten the lower beam and the bottom formwork, so that the bottom formwork is close to the bottom surface of the concrete structure; S6. Pour the post-cast joint concrete.

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