CN104818809B - Construction method for combined plate staircase - Google Patents

Abstract

The invention relates to a construction method of a composite slab staircase, comprising: making steel formwork of corresponding size and quantity according to the size of the staircase, including an integral steel plate (1) at the bottom, several standard step formworks (2) in the middle of the stair steps, an upper step Formwork (3), a lower step formwork (4); the bottom integral steel plate (1) is made according to the size of the stairs, the two ends of the bottom integral steel plate are bent, the upper end after bending is used to connect with the upper platform plate, and the lower end Used to connect with the lower platform slab, the length of the upper end and the lower end after bending is equivalent to the width of the upper step formwork (3) and one lower step formwork (4); install the stair formwork; fix the lifting ring (6); hoist it in place , the upper step formwork (3) and the lower step formwork (4) are respectively fixed on the upper platform beam and the lower platform beam with anchor bolts; pouring concrete. The invention can make the stair construction operation simple, improve the stair quality and reduce the cost.

Description

A construction method of composite slab stairs

Technical field

The invention belongs to the field of construction engineering, and in particular relates to a stair construction method.

Background technique

Stairs are vertical transportation facilities in buildings, and their quality plays a vital role in normal use and handling of emergencies. At present, the stairs are usually constructed with wooden formwork. The rigidity and stability of the formwork are poor, and mold runout and displacement often occur, which affects the quality of the project. Moreover, it takes a long time to set up the formwork, which is inconvenient to install and disassemble. When the concrete strength is not enough, it may cause damage, and the construction is complicated. , low efficiency; wooden formwork has fewer sources of materials, which damages the environment and costs more. Therefore, the method for carrying out stair construction with wooden formwork loosely assembled needs to be improved.

Contents of the invention

The present invention provides a stair construction method in order to solve the above-mentioned problems existing in the prior art. The invention can make the stair construction operation simple, improve the stair quality and reduce the cost. The technical scheme that the present invention takes is:

A construction method for composite slab stairs, comprising the following steps:

1) Determine the size of the stairs, mainly including the width, length, number of steps, and width of the steps.

2) Make steel formwork of corresponding size and quantity, including the overall steel plate at the bottom (1), several standard step formworks in the middle of the stair steps (2), one upper step formwork (3), and one lower step formwork (4); according to the size of the stairs Making the bottom integral steel plate (1), the two ends of the bottom integral steel plate are bent, the bent upper end is used for connecting with the upper platform plate, and the lower end is used for connecting with the lower platform plate, the length of the bent upper end and the lower end is Respectively with the width of the upper step template (3) and a lower step template (4);

3) Install the stair formwork: between each adjacent central standard step formwork (2), the central standard formwork (2) and the bottom integral steel plate (1) are fixedly connected, and the upper step formwork (3) and the lower The step formwork (4) is respectively fixedly connected with the corresponding central standard step formwork (2); the two sides of each central standard step formwork (2) are right-angled trapezoids, the slope of the trapezoidal slope is consistent with the slope of the stairs, and the overall steel plate at the bottom (1) The slope is consistent with the slope of the stairs;

4) Fix the hoisting ring (6) at the place where the stair formwork can be kept stable during the hoisting process, and the diameter of the hoisting ring must meet the hoisting load requirements.

5) Lift the stair formwork connected in step (3) into place, and the anchor bolt holes at the connection between the upper step formwork (3) and the lower step formwork (4) and the bottom integral steel plate should be connected with the upper platform beam and the lower platform beam respectively. Align the positions of reserved anchor bolt holes, fix the upper step formwork (3) and lower step formwork (4) on the upper platform beam and the lower platform beam respectively with anchor bolts, and cut off the hoisting ring after the hoisting is completed;

6) Pouring concrete: Pour concrete from the middle standard step formwork at the top of the stair formwork. After the upper step formwork is poured, under the action of gravity, the concrete will automatically flow into the next step formwork until the entire stair formwork is poured.

The advantages and positive effects that the present invention has are:

(1) The rigidity and stability of the steel formwork are strong, the concrete is not easily deformed, and the appearance quality is good, which ensures the quality of the project;

(2) The steel formwork is used as a permanent formwork, which can be directly installed in place during construction without disassembly, easy to operate, save man-hours, and safe in construction;

(3) Save wood and protect the environment;

(4) The steel formwork and the concrete can be bonded to work together as a whole, thereby effectively improving the bearing capacity of the stairs.

Description of drawings

Fig. 1 is the structural representation of this composite staircase;

Fig. 2 is a schematic diagram of a standard step template;

Fig. 3 is a schematic diagram of step templates up and down;

In the figure: 1-integral steel plate, 2-standard step formwork, 3-upper step formwork, 4-lower step formwork, 5a, high-strength bolt, 5b-anchor bolt, 6-lifting ring, 7-bolt hole, 8-anchor bolt hole.

detailed description

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, the staircase process of the present invention is as follows:

(1) Measure and check the size of the stairs, mainly including the width, length, number of steps, and width of the steps.

(2) Make a template. According to the data, the steel formwork of corresponding size and quantity is made, and the steel formwork includes an integral steel plate 1, several standard step formworks 2 in the middle of the stair steps, an upper step formwork 3, a lower step formwork 4, high-strength bolts 5a, anchor bolts 5b and Lifting ring 6.

The specific construction method of the formwork is as follows:

First, make the bottom integral steel plate 1 according to the size of the stairs, bend at the width position of the upper and lower step templates at both ends of the integral steel plate, the bending angle is consistent with the gradient of the stairs, and connect with the step templates 2, 3, 4 Bolt holes are opened at the bolt position;

Make described standard step template 2, upper step template 3 and lower step template 4 respectively, and open bolt holes at corresponding positions, as shown in Figure 2 and Figure 3;

Connect the standard formwork 2, the standard formwork 2 and the bottom steel plate 1 with the high-strength bolt 5a, and the upper and lower step formworks 3, 4 are respectively connected with the standard formwork 2, and the upper and lower formworks are not connected at this time. Step templates 3, 4 and bottom steel plate 1;

Weld the hoisting ring 6 at the corresponding position, the diameter of the hoisting ring must meet the hoisting load requirements, and the welding position must be calculated by bending moment mechanics to ensure that the stair formwork can remain stable during the hoisting process.

(3) Install the template. Hoist the steel formwork in place, the anchor bolt holes at the connection between the upper and lower step formwork and the steel plate should be aligned with the positions of the anchor bolt holes reserved on the upper and lower platform beams, fix the upper and lower step formworks on the upper and lower platform beams respectively with anchor bolts 5b, and the hoisting is completed Then cut off the lifting ring. During the formwork installation and construction process, pay attention to the appropriate adjustment of the stair step elevation, starting position and levelness.

(4) Pouring concrete. Concrete is poured from the uppermost step formwork of the staircase formwork. After the upper step formwork is poured, under the action of gravity, the concrete will automatically flow into the next step formwork until the entire steel formwork is poured. After the pouring is completed, the concrete surface is automatically leveled and the appearance is good.

(5) Concrete maintenance. Pay attention to the artificial damage to the concrete until it can be used normally. There is no need to disassemble the formwork. The steel formwork remains in the stairs as a permanent formwork. The steel plate at the bottom of the concrete can replace the reinforcement in the concrete, effectively improving the bearing capacity of the concrete.

The advantages and positive effects of the present invention are: the rigidity and stability of the steel formwork is strong, the concrete is not easily deformed, the appearance quality is good, and the quality of the project is guaranteed; the steel formwork is used as a permanent formwork, and it can be directly installed in place during construction without disassembly, and the operation is simple , save man-hours, construction safety; save wood, protect the environment; steel formwork and concrete can be bonded to work together as a whole, thus effectively improving the bearing capacity of the stairs.

Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art Under the enlightenment of the present invention, people can also make many forms without departing from the purpose of the present invention and the scope of protection of the claims, and these all belong to the protection scope of the present invention.

Claims (1)

1. A construction method for composite slab stairs, comprising the following steps: 1) Determine the size of the stairs, mainly including the width, length, number of steps, and width of the steps; 2) Make steel formwork of corresponding size and quantity, including the overall steel plate at the bottom (1), several standard step formworks in the middle of the stair steps (2), one upper step formwork (3), and one lower step formwork (4); according to the size of the stairs Making the bottom integral steel plate (1), the two ends of the bottom integral steel plate are bent, the bent upper end is used for connecting with the upper platform plate, and the lower end is used for connecting with the lower platform plate, the length of the bent upper end and the lower end is Respectively with the width of the upper step template (3) and a lower step template (4); 3) Install the stair formwork: between each adjacent standard step formwork (2) in the middle, between the standard step formwork (2) in the middle part and the integral steel plate (1) at the bottom, fix and connect the upper step formwork (3) and The lower step formwork (4) is fixedly connected with the corresponding middle standard step formwork (2) respectively; both sides of each middle standard step formwork (2) are right-angled trapezoids, and the slope of the trapezoid's hypotenuse is consistent with the slope of the stairs, and the bottom as a whole The slope of the steel plate (1) is consistent with the slope of the stairs; 4) Fix the hoisting ring (6) at the place where the stair formwork can be kept stable during the hoisting process, and the diameter of the hoisting ring must meet the hoisting load requirements; 5) Lift the stair formwork connected in step (3) into place, and the anchor bolt holes at the connection between the upper step formwork (3) and the lower step formwork (4) and the bottom integral steel plate should be connected with the upper platform beam and the lower platform beam respectively. Align the positions of reserved anchor bolt holes, fix the upper step formwork (3) and lower step formwork (4) on the upper platform beam and the lower platform beam respectively with anchor bolts, and cut off the hoisting ring after the hoisting is completed; 6) Pouring concrete: Pour concrete from the standard step formwork at the top of the stair formwork. After the upper step formwork is poured, under the action of gravity, the concrete will automatically flow into the next step formwork until the entire stair formwork is poured.