阅读说明：本技术 卡槽式装配混凝土楼梯 (Clamping groove type assembled concrete stair ) 是由 张延年 于宏扬 秦桂娟 于洋 李志军 陈志燕 杜松岩 董宁 李琦琦 陈昊 刘柏男 于 2019-12-03 设计创作，主要内容包括：本发明涉及一种卡槽式装配混凝土楼梯,属于建筑技术领域。在距斜梯板上部侧表面布置弯起钢筋,并在斜梯板顶面等距布置若干个混凝土卡槽与弯起钢筋绑扎,在斜梯板底部侧表面布置受力筋,在受力筋上侧等距离布置分布钢筋；所述两块水平梯板分别设置在斜梯板的上下端,两块水平梯板分别固定在两块梯梁上部；在踏步底部沿其形状布置弯起钢筋,踏步上部布置受力筋,在受力筋下部等距离布置分布钢筋,踏步的底部整体固定在若干个混凝土卡槽上,缝隙灌注有高强水泥砂浆。本发明运输方便,连接简单,无需现场支模与焊接,提高了安装效率,混凝土卡槽的的设置提高了整体承载力和稳定性,适应装配式建筑的发展。(The invention relates to a clamping groove type assembled concrete stair, and belongs to the technical field of buildings. Arranging bent-up steel bars on the side surface of the upper part of the inclined ladder plate, arranging a plurality of concrete clamping grooves on the top surface of the inclined ladder plate at equal intervals for binding with the bent-up steel bars, arranging stress bars on the side surface of the bottom of the inclined ladder plate, and arranging distributed steel bars on the upper sides of the stress bars at equal intervals; the two horizontal ladder boards are respectively arranged at the upper end and the lower end of the inclined ladder board, and the two horizontal ladder boards are respectively fixed at the upper parts of the two ladder beams; arranging bent reinforcing steel bars at the bottom of each step along the shape of the step, arranging stress bars at the upper part of each step, arranging distributed reinforcing steel bars at the lower parts of the stress bars at equal intervals, integrally fixing the bottom of each step on a plurality of concrete clamping grooves, and pouring high-strength cement mortar into gaps. The invention has convenient transportation and simple connection, does not need on-site formwork erecting and welding, improves the installation efficiency, improves the integral bearing capacity and stability by arranging the concrete clamping groove, and is suitable for the development of assembly type buildings.)

1. The utility model provides a draw-in groove formula assembly concrete stair which characterized in that: comprises steps (1), concrete slots (2), horizontal ladder boards (3), inclined ladder boards (4) and ladder beams (5);

bending reinforcing steel bars (10) are arranged at a position 15mm away from the top surface of the inclined step plate (4) from the side surface of the upper part of the inclined step plate (4), a plurality of concrete clamping grooves (2) are arranged at equal intervals on the top surface of the inclined step plate (4) and are bound with the bending reinforcing steel bars (10), stress ribs (8) are arranged at a position 15mm away from the bottom surface of the inclined step plate (4) from the side surface of the bottom part of the inclined step plate (4), and distributed reinforcing steel bars (7) are arranged at equal intervals on the upper sides of the stress ribs (8); the two horizontal ladder plates (3) are respectively arranged at the upper end and the lower end of the inclined ladder plate (4), and the two horizontal ladder plates (3) are respectively fixed at the upper parts of the two ladder beams (5); arrange angle reinforcing bar (9) along its shape in the position of stepping on (1) bottom apart from surface 15mm, step on (1) upper portion apart from upper surface 15mm department and arrange atress muscle (8), arrange distribution reinforcing bar (7) in atress muscle (8) lower part equidistance, the bottom monolithic stationary of (1) of stepping on is on a plurality of concrete draw-in groove (2), and the gap is poured into high strength cement mortar.

2. The slot-in assembled concrete stair of claim 1, wherein: a ladder beam groove (6) is formed above the ladder beam (5), the ladder beam groove (6) comprises two grooves, one groove is close to one side of the step (1) and is a U-shaped groove, the depth is 2/3 of the height of the ladder beam (5), and the width is 1/5 of the width of the ladder beam (5); the other is an L-shaped groove at the outer side of the ladder beam (5), the depth is 2/3 of the height of the ladder beam (5), and the width is 1/4 of the width of the ladder beam (5).

3. The slot-in assembled concrete stair of claim 1, wherein: the upper part of the integrally cast concrete clamping groove (2) is arc-shaped, so that stress concentration is avoided.

4. The slot-in assembled concrete stair of claim 1, wherein: the first section of the tread (1) is 210mm high and 240mm wide, and the heights of other treads are 170mm and 270mm wide.

5. The slot-in assembled concrete stair of claim 1, wherein: the bottom of the inclined ladder board (4) is provided with a cavity for better pouring cement mortar.

6. The slot-in assembled concrete stair of claim 1, wherein: the diameters of the stress steel bars (8) and the distribution steel bars (7) are both 8mm, and the stress steel bars (8) are perpendicular to the distribution steel bars (7).

7. The slot-in assembled concrete stair of claim 1, wherein: and two ends of the bent reinforcing steel bar (10) extend to the inner side of the upper part of the horizontal ladder board (3).

8. The slot-in assembled concrete stair of claim 1, wherein: the lower part of the horizontal ladder board (3) is connected with a ladder beam groove (6) arranged above the ladder beam (5) in a matched joint way

High-strength cement mortar is poured in the gap.

9. The slot-in assembled concrete stair of claim 1, wherein: the bottom of the step (1) is provided with a plurality of obliquely upward grooves which are arc-shaped and matched with the arc-shaped upper parts of the concrete clamping grooves (2).

10. The slot-in assembled concrete stair of claim 1, wherein:

a steel skeleton is embedded in the concrete clamping groove (2); the steel skeleton comprises a first steel pipe (2.1), a steel plate (2.2), skeleton steel bars (2.3), a second steel pipe (2.4) and a third steel pipe (2.5);

four framework steel bars (2.3) are welded at four corners of the lower portion of the steel plate (2.2), a first steel pipe (2.1) is welded at two vertex angles on one side of the steel plate (2.2) at an angle of 135 degrees, a second steel pipe (2.4) is welded at two vertex angles on the other side of the steel plate (2.2), a third steel pipe (2.5) is parallel to the steel plate (2.2), and the third steel pipe (2.5) is welded with the first steel pipe (2.1) and the second steel pipe (2.4); the short sides of the first steel pipe (2.1), the second steel pipe (2.4) and the steel plate (2.2) form a triangular whole;

the third steel pipe (2.5) is a cylinder, the long edge of the steel plate (2.2) is arc-shaped, and the bottom of the framework steel bar (2.3) is bound with the bent steel bar (10) of the inclined step plate (4).

Technical Field

The invention belongs to the technical field of buildings, and particularly relates to a clamping groove type assembled concrete stair.

Background

In the fabricated building, the clamping groove type fabricated concrete stair occupies a very important position in the whole building system, the stair is used as a main vertical traffic and emergency evacuation channel of the building and has important influence on the normal use and emergency evacuation of the whole building, and the fabricated degree of the stair is one of main indexes of the fabricated building. In the steel structure building, adopt traditional cast-in-place reinforced concrete stair though have great advantage in fastness, syllable-dividing effect and non-maintaining, but reinforced concrete stair dead weight is great, need carry out complex processes such as formwork, reinforcement and cast in situ, maintenance, have that the construction period is long, the hidden engineering is many, the poor shortcoming of quality controllability, and it produces to take turns to this assembled steel structure stair.

Disclosure of Invention

In order to solve the technical problems, the invention provides a clamping groove type assembled concrete stair, which is mainly used for developing the clamping groove type assembled concrete stair with definite force transmission, simple structure, safety, reliability, material saving and convenient construction, and can effectively solve the problems of difficult transportation, complex connection, on-site formwork support and welding, low installation efficiency and the like.

The technical scheme adopted by the invention is as follows:

the utility model provides a draw-in groove formula assembly concrete stair which characterized in that: comprises steps, concrete clamping grooves, horizontal ladder boards, inclined ladder boards and ladder beams;

arranging bent reinforcing steel bars at a position 15mm away from the top surface of the inclined ladder board from the side surface of the upper part of the inclined ladder board, arranging a plurality of concrete clamping grooves at equal intervals on the top surface of the inclined ladder board to be bound with the bent reinforcing steel bars, arranging stress ribs at a position 15mm away from the bottom surface of the inclined ladder board from the side surface of the bottom part of the inclined ladder board, and arranging distributed reinforcing steel bars at equal intervals on the upper sides of the stress ribs; the two horizontal ladder boards are respectively arranged at the upper end and the lower end of the inclined ladder board, and the two horizontal ladder boards are respectively fixed at the upper parts of the two ladder beams; arranging bent reinforcing steel bars at the positions 15mm away from the outer surface of the stepping bottom along the shape of the bent reinforcing steel bars, arranging stress bars at the positions 15mm away from the upper surface of the stepping upper part, arranging distributed reinforcing steel bars at the lower parts of the stress bars at equal intervals, integrally fixing the stepping bottom on a plurality of concrete clamping grooves, and pouring high-strength cement mortar into gaps.

Furthermore, a ladder beam groove is formed above the ladder beam, and comprises two grooves, wherein one groove is close to one side of the step and is a U-shaped groove, the depth of the groove is 2/3 of the height of the ladder beam, and the width of the groove is 1/5 of the width of the ladder beam; the other is an L-shaped groove at the outer side of the ladder beam, the depth is 2/3 of the height of the ladder beam, and the width is 1/4 of the width of the ladder beam.

Furthermore, the upper part of the integrally poured concrete clamping groove is arc-shaped, so that stress concentration is avoided.

Further, the first step section is 210mm high and 240mm wide, and the other steps are 170mm high and 270mm wide.

Furthermore, the bottom of the inclined ladder plate is provided with a cavity for better pouring cement mortar.

Furthermore, the diameters of the stressed steel bars and the distributed steel bars are both 8mm, and the stressed steel bars are perpendicular to the distributed steel bars.

Furthermore, two ends of the bent reinforcing steel bars extend to the inner side of the upper part of the horizontal ladder board.

Further, horizontal step lower part and the ladder beam groove cooperation seam of arranging above the ladder beam are connected, and the gap is poured with high strength cement mortar.

Furthermore, the bottom of the step is provided with a plurality of obliquely upward grooves which are arc-shaped and matched with the arc-shaped upper parts of the concrete clamping grooves.

Furthermore, a steel skeleton is embedded in the concrete clamping groove; the steel skeleton comprises a first steel pipe, a steel plate, skeleton steel bars, a second steel pipe and a third steel pipe;

four framework steel bars are welded at four corners of the lower portion of the steel plate, a first steel pipe is welded at two vertex angles on one side of the steel plate, the angle is DEG, a second steel pipe is welded at two vertex angles on the other side of the steel plate, a third steel pipe is parallel to the steel plate, and the third steel pipe is welded with the first steel pipe and the second steel pipe; the first steel pipe, the second steel pipe and the short side of the steel plate form a triangular whole;

the third steel pipe is a cylinder, the long edge of the steel plate is arc-shaped, and the bottom of the framework steel bar is bound with the bent steel bar of the inclined ladder plate.

The invention has the advantages of

The invention has the advantages of convenient transportation, simple connection, no need of on-site formwork erecting and welding, improved installation efficiency, improved integral bearing capacity and stability due to the arrangement of the concrete clamping groove, and suitability for the development of assembly type buildings.

Drawings

Fig. 1 is a side view of a slot-type assembled concrete stair according to the invention.

Fig. 2 is a reinforcement diagram of a slot type assembled concrete stair tread of the invention.

Fig. 3 is a top view of a snap-fit concrete stair tread of the present invention.

Fig. 4 is a front view of an assembled steel skeleton of the present invention.

FIG. 5 is a rib arrangement diagram of the step of the slot type assembled concrete stair of the present invention.

FIG. 6 is a detailed view of the connection of the ladder boards of the chute type assembly concrete stair beam.

In the figure, 1 is a step; 2 is a concrete slot; 2.1 is a first steel pipe; 2.2 steel plates; 2.3 framework steel bars; 2.4, a second steel pipe; 2.5 is a steel pipe III; 3 is a horizontal step plate; 4 is an inclined ladder plate; 5 is a ladder beam; 6 is a ladder beam groove; 7 is a distribution reinforcing steel bar; 8 is a stress rib; 9 bent-up bars and 10 bent-up bars.

Detailed Description

In order to further illustrate the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, which should not be construed as limiting the scope of the present invention.