Stair formwork supporting base capable of being effectively combined with floor concrete

Abstract

The utility model discloses a stair formwork supporting base capable of being effectively combined with floor concrete, which comprises an anti-displacement reinforcing steel bar ring, an anti-displacement reinforcing steel bar, a supporting plate and a supporting plate, wherein the anti-displacement reinforcing steel bar ring is arranged in the center of the top of the base; the lower anchoring rib is arranged at the bottom of the base; the four supporting steel bars are symmetrically arranged in a cross shape, the upper end of each supporting steel bar is fixedly connected with the anti-displacement steel bar ring, and the lower end of each supporting steel bar is fixedly connected with the lower anchoring bar, so that the anti-displacement steel bar ring, the square frame of the lower anchoring bar and the supporting steel bars are connected to form a steel bar support; the concrete pier is poured on the outer side of the steel bar bracket and is arranged on the stair platform template; the lower ends of the supporting vertical rods are vertically arranged in the displacement-preventing steel bar rings, and the upper ends of the supporting vertical rods abut against the bottom of the upper-layer stair platform formwork. The post-cutting problem that after floor concrete pouring is completed, a steel pipe or a steel bar support needs to be cut can be solved, and the building efficiency of a stair formwork supporting system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stair construction, in particular to a stair formwork support base which can be effectively combined with floor slab concrete. Background Art

[0002] Stairs are components used for vertical transportation between floors in a building. The upper and lower stairs are effectively connected by leaving construction joints. The formwork and pouring construction are carried out simultaneously with the floor structure. This requires the stair formwork support system to be stable and reliable. This application uses concrete piers as the support base for the vertical poles, and combines steel bar anchoring with cast-in-place floor slabs. Traditional methods of supporting stair vertical poles include supporting the vertical poles on the formwork or setting a "earth"-shaped steel bar base and welding it to the floor slab steel bars to support the vertical poles.

[0003] The traditional technology is to support the steel pipe on the formwork, which makes it impossible to remove the steel pipe buried in the concrete after the concrete is poured. When removing the formwork, the steel pipe must be cut off at the contact surface with the concrete, resulting in waste of steel pipes. The subsequent sealing of the holes formed by the steel pipe also poses a risk of water seepage and wastes manpower and financial resources. The "earth"-shaped steel bar base is used, and the lower support is not reliable, the frame is poorly stable, and the steel bars need to be removed later. Improper handling will cause the steel bars to rust severely and expand, leading to concrete cracks. Utility Model Content

[0004] The purpose of the utility model is to provide a stair formwork support base that can be effectively combined with floor concrete to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides a stair formwork support base that can be effectively combined with floor concrete, including: an anti-displacement steel bar ring, which is arranged at the center position of the top of the base; lower anchor bars, which are arranged at the bottom of the base, and the lower anchor bars include two transverse anchor bars and two longitudinal anchor bars, and the two transverse anchor bars and the longitudinal anchor bars are perpendicular to each other to form a square frame located in the middle and an exposed section located outside the square frame; supporting steel bars, four supporting steel bars are symmetrically arranged in a cross shape, the upper end of each supporting steel bar is fixedly connected to the anti-displacement steel bar ring, and the lower end is fixedly connected to the lower anchor bar, so that the anti-displacement steel bar ring, the square frame of the lower anchor bar and the supporting steel bars are connected to form a steel bar bracket; a concrete pier, which is cast on the outside of the steel bar bracket and arranged on the stair platform template; a supporting upright, the lower end of the supporting upright is vertically arranged in the anti-displacement steel bar ring, and the upper end is against the bottom of the upper stair platform template.

[0006] In a preferred embodiment, the inner diameter of the anti-displacement steel bar ring is larger than the outer diameter of the supporting upright, and the upper surface of the anti-displacement steel bar ring is higher than the stair concrete slab.

[0007] In a preferred embodiment, the arrangement height and steel bar type of the lower anchor bar are the same as the lower steel bars of the stair concrete slab, the length of the exposed section is the anchor length, and the exposed section is tied and connected to the stair concrete slab.

[0008] In a preferred embodiment, the concrete pier is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom, and the pouring height of the concrete pier is the same as the thickness of the stair concrete slab.

[0009] In a preferred embodiment, the center of the anti-displacement steel bar ring and the center of the square frame are on the same vertical line, and the side length of the square frame is greater than the outer diameter of the anti-displacement steel bar ring.

[0010] In a preferred embodiment, the support poles of the upper layer are arranged at positions corresponding to the support poles of the lower layer.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts prefabricated concrete piers as the support base, which can effectively fix the lower part of the formwork support pole, and is stable and reliable. The existing public technologies all require secondary processing, while the present application can be formed in one step, which can solve the problem of post-cutting of steel pipes or steel bar brackets after the floor concrete is poured, and has significant effects in saving construction time and labor costs. The present application is simple and easy to make and install, and has strong practicality, which greatly improves the efficiency of erecting the stair formwork support system. At the same time, the materials used are all on-site waste, which greatly improves the utilization rate of construction materials and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an elevation view of a stair formwork support base according to a preferred embodiment of the utility model;

[0013] Figure 2 This is a elevation view of a steel bar support according to a preferred embodiment of the present utility model;

[0014] Figure 3 A plan view of a steel bar support according to a preferred embodiment of the present utility model;

[0015] Figure 4 This is a schematic diagram of the concrete pier arrangement of a preferred embodiment of the utility model;

[0016] Figure 5 It is a schematic diagram of the overall assembly of a preferred embodiment of the utility model.

[0017] Description of reference numerals:

[0018] 1- Anti-displacement steel bar ring, 2- Lower anchor bar, 21- Square frame, 22- Exposed section, 3- Support steel bar, 4- Support vertical pole, 5- Concrete pier, 6- Stair concrete slab. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model are described clearly and completely below. The embodiments of the utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-5 As shown, the stair formwork support base that can be effectively combined with the floor concrete according to the preferred embodiment of the utility model comprises: an anti-displacement steel bar ring 1, a lower anchor bar 2, a support steel bar 3, a support vertical bar 4 and a concrete pier 5, wherein the anti-displacement steel bar ring 1 is arranged at the center of the top of the base, and the lower anchor bar 2 is arranged at the bottom of the base. The lower anchor bar 2 comprises two transverse anchor bars and two longitudinal anchor bars, and the two transverse anchor bars and the longitudinal anchor bars are perpendicular to each other to form a square frame 21 located in the middle and an exposed section 22 located outside the square frame 21. The four support steel bars 3 are symmetrically arranged in a cross shape, and the upper end of each support steel bar 3 is fixedly connected to the anti-displacement steel bar ring 1, and the lower end is fixedly connected to the lower anchor bar 2, so that the anti-displacement steel bar ring 1, the square frame 21 of the lower anchor bar 2 and the support steel bar 3 are connected to form a steel bar bracket. The lower end of the support vertical bar 4 is vertically arranged in the anti-displacement steel bar ring 1, and the upper end is against the bottom of the upper stair platform template. The concrete pier 5 is cast on the outside of the steel bar bracket and is arranged on the stair platform template.

[0021] Furthermore, the inner diameter of the anti-displacement steel ring 1 is larger than the outer diameter of the support rod 4, and the upper surface of the anti-displacement steel ring 1 is slightly higher than the stair concrete slab 6, so as to ensure that the support rod 4 is not offset. The upper support rod 4 corresponds to the lower support rod 4. The upper end of the lower support rod 4 is against the bottom of the stair platform template of the current layer.

[0022] Furthermore, the arrangement height and steel bar type of the lower anchor bar 2 are the same as the lower steel bars of the stair concrete slab. The length of the exposed section 22 is the anchoring length. The exposed section 22 is tied and connected to the stair concrete slab, thereby increasing the bond strength with the cast-in-place concrete to form a whole and prevent it from falling off.

[0023] Furthermore, the concrete pier 5 is designed as an isosceles trapezoidal structure that is wide at the top and narrow at the bottom to avoid affecting the floor slab reinforcement, which can be normally arranged without cutting. The pouring height of the concrete pier 5 is the same as the thickness of the staircase concrete slab. After reaching 1.2MPa, the four facades of the concrete pier 5 are roughened.

[0024] Furthermore, the center of the anti-displacement steel bar ring 1 and the center of the square frame 21 are on the same vertical line, and the side length of the square frame 21 is greater than the outer diameter of the anti-displacement steel bar ring 1 .

[0025] In a specific implementation, the anti-displacement steel bar ring 1 can be made of C6 threaded steel bar, and the inner diameter of the anti-displacement steel bar ring 1 is 5-6 cm. The support steel bar 3 is made of C8 threaded steel bar, with a length of 32 cm, and a total of 4 bars. The lower anchor bar 2 is made of C8 threaded steel bar, with a length of 54 cm, and a total of 4 bars. The concrete grade is C30, and the height is the same as the thickness of the stair concrete slab. The support vertical rod 4 is a cylindrical steel pipe, and a socket-type buckle frame can be used.

[0026] The construction process of the utility model is as follows: first assemble the steel support, pour the concrete pier 5, and pour the concrete pier 5 into an isosceles trapezoid that is wide at the top and narrow at the bottom. The pouring height is the thickness of the stair concrete slab, and the exposed section 22 of the lower anchor bar 2 is exposed outside the concrete pier. When it reaches 1.2MPa, the four facades of the concrete pier are roughened. The concrete pier 5 is placed on the stair platform formwork, the exposed section of the lower anchor bar is tied and connected to the stair concrete slab, the bottom of the support vertical rod 4 is set in the anti-displacement steel ring 1, and the upper end is against the bottom of the upper stair platform formwork, and the stair slab concrete is poured. When the base of the utility model is used, after the floor slab concrete is poured, the base and the floor slab concrete form a whole, without any exposed components, and no cutting is required, which improves the construction efficiency.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stair formwork support base that can be effectively combined with floor concrete, characterized in that: include: An anti-displacement steel bar ring (1), wherein the anti-displacement steel bar ring (1) is arranged at a central position on the top of the base; Lower anchoring bars (2), the lower anchoring bars (2) being arranged at the bottom of the base, the lower anchoring bars (2) comprising two transverse anchoring bars and two longitudinal anchoring bars, the two transverse anchoring bars and the longitudinal anchoring bars being perpendicular to each other to form a square frame (21) located in the middle and an exposed section (22) located outside the square frame (21); Support steel bars (3), wherein four of the support steel bars (3) are symmetrically arranged in a cross shape, the upper end of each of the support steel bars (3) is fixedly connected to the anti-displacement steel bar ring (1), and the lower end is fixedly connected to the lower anchor bar (2), so that the anti-displacement steel bar ring (1), the square frame (21) of the lower anchor bar (2) and the support steel bars (3) are connected to form a steel bar bracket; A concrete pier (5) is cast outside the steel support and is arranged on the staircase platform formwork; A support upright (4), wherein the lower end of the support upright (4) is vertically arranged in the anti-displacement steel bar ring (1), and the upper end abuts against the bottom of the upper staircase platform template.

2. The stair formwork support base that can be effectively combined with floor concrete according to claim 1 is characterized in that: The inner diameter of the anti-displacement steel bar ring (1) is greater than the outer diameter of the supporting upright (4), and the upper surface of the anti-displacement steel bar ring (1) is higher than the stair concrete slab.

3. The stair formwork support base that can be effectively combined with floor concrete according to claim 2 is characterized in that: The arrangement height and steel bar type of the lower anchor bar (2) are the same as the lower steel bars of the stair concrete slab; the length of the exposed section (22) is the anchoring length; and the exposed section (22) is connected to the stair concrete slab by binding.

4. The stair formwork support base that can be effectively combined with floor concrete according to claim 3 is characterized in that: The concrete pier (5) is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom, and the pouring height of the concrete pier (5) is the same as the thickness of the staircase concrete slab.

5. The stair formwork support base that can be effectively combined with floor concrete according to claim 4 is characterized in that: The center of the circle of the anti-displacement steel bar ring (1) and the center of the square frame (21) are on the same vertical line, and the side length of the square frame (21) is greater than the outer diameter of the anti-displacement steel bar ring (1).

6. The stair formwork support base that can be effectively combined with floor slab concrete according to claim 1 is characterized in that: The support uprights (4) of the upper layer are arranged at positions corresponding to those of the support uprights (4) of the lower layer.

Images