Post-cast strip independent supporting structure and construction method thereof

Abstract

A post-cast strip independent supporting structure comprises a plurality of supporting sets which are arranged at equal intervals in the length direction of a post-cast strip, each supporting set comprises two supporting single bodies, each supporting single body comprises three vertical steel pipes which are arranged in a delta shape, the three vertical steel pipes are connected through rotating fasteners, and steel base plates are welded to the upper sides of the three vertical steel pipes; and a concrete column pier for simultaneously covering the three vertical steel pipes is arranged at the lower part of the concrete column pier. The construction method comprises the construction steps that after the top plate formwork is completed, square holes are formed in the top plate formwork at the corresponding supporting positions, every three steel pipes are connected with the whole supporting pieces arranged in the shape like the Chinese character'pin 'through rotating fasteners, and steel base plates are welded; the top end of the whole supporting piece extends into the square hole, and after the perpendicularity is measured to meet the requirement, a formwork is erected, and a column pier is poured; and after the column pier is solidified and demoulded, concrete pouring can be conducted on the basement top plate, and warning paint is painted on the supporting single bodies. The post-cast strip can be independently supported, and the supporting structure of the post-cast strip part is separated from the whole supporting system.

Description

Technical Field

[0001] The invention relates to a post-cast strip independent supporting structure and a construction method thereof. Background Art

[0002] Post-cast strips are concrete strips left at corresponding positions of foundation slabs, walls, and beams in accordance with design or construction specifications to prevent harmful cracks that may occur in reinforced concrete structures due to uneven shrinkage or settlement during construction. Post-cast strips temporarily divide the structure into several parts. After the internal shrinkage of the components, the construction joints are poured with concrete after a certain period of time to connect the structure into a whole. For details, please refer to Chinese patent CN202210474722.5.

[0003] During the construction of the basement roof, the post-casting strip construction process is to build the post-casting strip together with the support system of the main structure. Due to the particularity of the post-casting strip, the support of this part cannot be removed before the pouring of the post-casting strip. However, when the formwork support outside the post-casting strip is normally removed, it is inevitable that the formwork support system at the post-casting strip will become loose. Some are even removed together and then re-installed. This will cause the beams and slabs on both sides of the post-casting strip to form temporary cantilever components, thereby causing cracking damage at the root of the beams and slabs at the post-casting strip, affecting the quality of the main structure. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide an independent supporting structure for the post-cast strip, which can play the role of independent support for the post-cast strip, separate the supporting structure of the post-cast strip part from the overall supporting system, and retain the support of the post-cast strip part when the formwork is removed, so as to eliminate the influence of the formwork removal on the quality of the post-cast strip part.

[0005] The second technical problem to be solved by the present invention is to provide a construction method for the above-mentioned post-cast strip independent support structure, which has simple steps, convenient construction, and reduces the difficulty of support construction and management.

[0006] In order to solve the first technical problem mentioned above, the present invention provides an independent support structure for a post-cast strip, comprising a plurality of support groups arranged at equal intervals along the length direction of the post-cast strip, each support group comprising two support units, and the two support units in each support group are symmetrically distributed on both sides of the width direction of the post-cast strip, and each of the support units comprises three vertical steel pipes arranged in a herringbone shape, the three vertical steel pipes are connected and positioned by rotating fasteners and are flush up and down, a square steel pad is provided on the upper side of the three vertical steel pipes, the upper sides of the three vertical steel pipes are welded to the lower side of the square steel pad, and the lower parts of the three vertical steel pipes are provided with cylindrical concrete piers that simultaneously cover the lower parts of the three vertical steel pipes.

[0007] For the purpose of simple explanation, the post-cast strip independent support structure described in the present invention is referred to as the support structure below.

[0008] Advantages of this support structure: This support structure provides a safe and convenient load and structural design, which can play an independent supporting role for the post-cast strip, separate the supporting structure of the post-cast strip from the overall supporting system, and retain the support of the post-cast strip when the formwork is removed, so as to eliminate the impact of formwork removal on the quality of the post-cast strip. In addition, three steel pipes are connected in a herringbone shape as the bearing structure, which greatly reduces the difficulty of construction and management and improves construction efficiency. It has strong stability and good supporting and bearing performance. The bottom of the steel pipe is connected to the ground through a concrete pier, which is safe, reliable and stable.

[0009] In order to solve the above second technical problem, the present invention provides a construction method of a post-cast belt independent support structure, comprising the following steps:

[0010] (1) After the basement roof template is completed, a square hole is opened on the roof template at the supporting position corresponding to each supporting unit on both sides of the post-casting strip. The size of the square hole matches the size of the square steel pad;

[0011] (2) Use rotating fasteners to connect three steel pipes to the integral support members arranged in a finished shape;

[0012] (3) Weld a square steel plate on top of each integral support member;

[0013] (4) Corresponding to each square hole, extend the top end of the integral support member into the square hole so that the upper side of the square steel pad is flush with the upper side of the top plate template;

[0014] (5) After the verticality of the integral support is measured by instruments to meet the requirements, the formwork is erected and the concrete column pier is poured;

[0015] (6) After the concrete columns are solidified and the formwork is removed, the basement roof can be poured with concrete and the supporting units can be painted with warning paint.

[0016] For the purpose of simple explanation, the construction method of the post-casting belt independent support structure described in the present invention is referred to as the construction method below.

[0017] The advantages of this construction method are: simple steps, low cost, and faster and more convenient construction compared to the common support method of the post-cast strip; at the same time, the materials at the post-cast strip can be turned over in time, avoiding economic losses caused by material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main viewing direction of the support structure (showing one support group).

[0019] Figure 2It is a schematic diagram of the support structure when viewed from above (illustrated as three adjacent support groups, and the rotating fasteners are not shown). DETAILED DESCRIPTION

[0020] See also Figure 1 , Figure 2 A post-cast strip independent support structure, comprising a plurality of support groups arranged at equal intervals along the length direction of the post-cast strip, each support group comprising two support monomers, the two support monomers in each support group being symmetrically distributed on both sides of the width direction of the post-cast strip, each support monomer comprising three vertical steel pipes 1 arranged in a herringbone shape (the steel pipe 1 adopts a Φ48*3.6 round steel pipe), the three vertical steel pipes 1 are connected and positioned by a rotating fastener 11 and are flush up and down, a square steel pad 2 is provided on the upper side of the three vertical steel pipes 1 (the size of the steel pad 2 is 200mm*200mm*2mm), the upper sides of the three vertical steel pipes 1 are welded to the lower side of the square steel pad 2, and the lower parts of the three vertical steel pipes 1 are provided with a cylindrical concrete column pier 3 (the column pier 3 has a diameter of 200mm and a height of 200mm) which simultaneously covers the lower parts of the three vertical steel pipes 1.

[0021] The above-mentioned construction method of the post-cast belt independent support structure comprises the following steps:

[0022] (1) After the basement roof template 4 is completed, a square hole is opened on the roof template 4 at the supporting position corresponding to each supporting unit on both sides of the post-casting belt, and the size of the square hole matches the size of the square steel pad 2;

[0023] (2) Every three steel pipes 1 are connected to the integral support member arranged in a finished shape by using a rotating fastener 11;

[0024] (3) Weld a square steel plate 2 on top of each integral support member;

[0025] (4) Corresponding to each square hole, extend the top end of the integral support member into the square hole so that the upper side of the square steel plate 2 is flush with the upper side of the top plate template 4;

[0026] (5) After the verticality of the integral support meets the requirements by measuring with instruments, the formwork is erected and the concrete column pier 3 is poured (the formwork is made of PVC pipes with a diameter of 200 mm and a height of 200 mm);

[0027] (6) After the concrete column 3 is solidified and the formwork is removed, the basement roof can be poured with concrete and the supporting units can be painted with warning paint.

Claims

1. A post-cast belt independent support structure, characterized in that: It comprises a plurality of support groups which are arranged at equal intervals along the length direction of the post-cast strip, each support group comprises two support monomers, the two support monomers in each support group are symmetrically distributed on both sides of the width direction of the post-cast strip, each support monomer comprises three vertical steel pipes which are arranged in a herringbone shape, the three vertical steel pipes are connected and positioned by rotating fasteners and are flush up and down, a square steel pad is provided on the upper side of the three vertical steel pipes, the upper sides of the three vertical steel pipes are welded to the lower side of the square steel pad, and the lower parts of the three vertical steel pipes are provided with cylindrical concrete piers which simultaneously cover the lower parts of the three vertical steel pipes.

2. A construction method for an independent supporting structure of a post-cast belt, characterized in that: The following steps are involved: (1) After the basement roof template is completed, a square hole is opened on the roof template at the supporting position corresponding to each supporting unit on both sides of the post-casting strip. The size of the square hole matches the size of the square steel pad; (2) Use rotating fasteners to connect three steel pipes to the integral support members arranged in a finished shape; (3) Weld a square steel plate on top of each integral support member; (4) Corresponding to each square hole, extend the top end of the integral support member into the square hole so that the upper side of the square steel pad is flush with the upper side of the top plate template; (5) After the verticality of the integral support is measured by instruments to meet the requirements, the formwork is erected and the concrete column pier is poured; (6) After the concrete columns are solidified and the formwork is removed, the basement roof can be poured with concrete and the supporting units can be painted with warning paint.

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