CN106771100A - Precast concrete stair structure and property detection loads support - Google Patents

Abstract

The invention discloses precast concrete stair structure and property detection loading support, belong to prefabricated components inspection loading support, its structure includes vertical height adjustable telescopic support, oblique channel-section steel ribbed stiffener, horizontal tray and horizontal sliding plate, described horizontal tray is arranged on the side of fixed vertical height adjustable telescopic support, and between the two by the connection of oblique channel-section steel ribbed stiffener, described horizontal sliding plate is arranged on horizontal tray.Compared with prior art, precast concrete stair structure and property detection loading support of the invention has the position that can conveniently, continuously adjust the upper and lower strong point, the features such as with the requirement of precast concrete stair structure and property detection for adapting to different model, thus with good application value.

Description

Loading bracket for structural performance inspection of precast concrete stairs

technical field

The invention relates to a prefabricated component inspection loading bracket, in particular to a prefabricated concrete staircase structure performance inspection loading bracket.

Background technique

The prefabricated building has the advantages of high industrialization level, convenient winter construction, reduced wet work on the construction site, reduced material consumption, reduced dust and construction waste on the construction site, etc., which is conducive to improving construction quality and production efficiency, reducing costs, realizing energy saving and emission reduction and protection environmental purpose. In recent years, with the improvement of my country's green construction, energy conservation and emission reduction requirements, and the sharp increase in labor market prices, prefabricated concrete components have begun to be widely used in construction projects. The traditional cast-in-place construction method of building stairs is complex, labor-intensive, and inefficient. The use of prefabricated stairs can greatly improve production efficiency, reduce on-site construction strength and save natural resources. Therefore, in the past two years, prefabricated stairs have begun to be used in concrete It is widely used in high-rise and high-rise buildings. For construction companies, prefabricated stairs are similar to doors and windows and are used as a building part. However, prefabricated stairs are different from doors and windows. It is a safe evacuation channel during earthquakes and fires, and its importance is self-evident. Therefore, it is stipulated in the building code that when prefabricated stairs are used, a certain proportion of samples is required for structural performance inspection (ie loading test).

Due to the different elevations of the support points at both ends of the prefabricated stairs, it is necessary to place the prefabricated stairs on a temporary loading bracket when doing the loading test. The specifications of the loading bracket need to be adapted to the model of the prefabricated staircase, that is, the height difference and projected length between the support points at both ends of the prefabricated staircase. The usual practice is to use channel steel or square steel pipe to weld a temporary loading bracket on site according to the type of prefabricated staircase that needs to be inspected for structural performance.

In different projects or in the same project, there may be many types of prefabricated stairs used. When performing structural performance inspection on samples of various types of prefabricated stairs, it is necessary to weld temporary loading brackets of multiple specifications on site, which results in Waste of labor and materials. Therefore, in the on-site loading test of prefabricated stairs, the height and length of the loading bracket can be adjusted, and it is required to be suitable for different types of prefabricated stairs.

Contents of the invention

The technical task of the present invention is to provide a prefabricated concrete staircase structural performance inspection loading bracket for the above-mentioned deficiencies in the prior art. Characteristics of requirements for structural performance inspection of different types of precast concrete stairs.

The technical solution adopted by the present invention to solve its technical problems is: it includes a vertically height-adjustable telescopic bracket, an oblique channel steel stiffener, a horizontal bracket and a horizontal sliding backing plate, and the horizontal bracket is arranged on a fixed vertical One side of the height-adjustable telescopic bracket, and the two are connected by oblique channel steel stiffeners, and the horizontal sliding backing plate is arranged on the horizontal bracket.

The vertical height-adjustable telescopic support includes a vertical telescopic sleeve rod, an upper connecting square steel pipe, a middle cross stiffener and a lower connecting channel steel. The vertical telescopic sleeve rod includes two, each vertically telescopic The sets of rods respectively include an outer square steel pipe and an inner square steel pipe. The inner square steel pipe is located in the inner cavity of the outer square steel pipe. Round holes are arranged on both sides of each outer square steel pipe, and a plurality of etc. The round holes arranged at intervals, the inner square steel pipe and the outer square steel pipe are fixed through the round holes inserted into the outer square steel pipe and the inner square steel pipe by pin rods, and the upper connecting square steel pipe is set at the upper part between the two inner square steel pipes , the lower connecting channel steel is arranged at the lower part between the two outer square steel pipes, the middle cross stiffener is arranged between the two outer square steel pipes, one end of the oblique channel steel stiffener is connected to the outer square steel pipe connected.

The horizontal bracket includes horizontal square steel pipes, cross stiffeners at the ends, square steel pipes connected horizontally in the middle and square steel pipes connected horizontally at the ends. The horizontal square steel pipes include two horizontal square steel pipes, which are symmetrically arranged front and back. Two horizontal square steel pipes are respectively provided with end cross stiffeners, intermediate horizontally connected square steel pipes and end horizontally connected square steel pipes. The telescopic brackets are connected, and the two horizontal square steel pipes between the middle horizontally connected square steel pipes and the end horizontally connected square steel pipes are provided with horizontal sliding backing plates.

The horizontal sliding backing plate includes an upper steel backing plate and a lower square steel pipe, the lower square steel pipe is arranged on the lower part of the upper steel backing plate, and bolt holes are respectively arranged at both ends of the upper steel backing plate, and the middle The upper surfaces of the two horizontal square steel pipes between the horizontally connected square steel pipes and the end horizontally connected square steel pipes are provided with chute respectively. A fixing bolt is arranged between the chute and the lower end of the fixing bolt is located in the chute, and the upper end of the fixing bolt passes through the bolt hole, and the horizontal sliding backing plate is fixed on the horizontal bracket by a nut.

Compared with the prior art, the prefabricated concrete staircase structure performance inspection loading bracket of the present invention has the following outstanding beneficial effects: safe and reliable, convenient to adjust, and strong applicability; before the prefabricated staircase is subjected to the loading test, it can be adjusted according to the specifications of the inspected staircase The protruding length of the two vertical telescopic rods and the position of the horizontal sliding backing plate are respectively fixed on the vertical telescopic rods and the horizontal sliding backing plate, and the prefabricated stairs are hoisted to the loading bracket to carry out the loading test of the prefabricated stairs. It has high versatility, avoids welding temporary brackets on site before the test, saves labor and materials, and avoids waste of resources.

Description of drawings

Accompanying drawing 1 is the perspective view of prefabricated concrete stair structural performance inspection loading support;

Accompanying drawing 2 is the top view of prefabricated concrete staircase structural performance inspection loading support;

Accompanying drawing 3 is the front view of prefabricated concrete staircase structural performance inspection loading bracket;

Accompanying drawing 4 is the side view of prefabricated concrete staircase structural performance inspection loading support;

Accompanying drawing 5 is the perspective view of horizontal sliding backing plate;

Accompanying drawing 6 is the prefabricated concrete stair structure performance inspection loading bracket to carry out the structural performance inspection schematic diagram of prefabricated stairs;

Explanation of reference signs: 1. External square steel pipe, 2. Internal square steel pipe, 3. Upper connecting square steel pipe, 4. Middle cross stiffener, 5. Lower connecting channel steel, 6. Diagonal channel steel stiffening rib, 7. Horizontal square steel pipe, 8, cross stiffener at the end, 9, square steel pipe connected horizontally in the middle, 10, square steel pipe connected horizontally at the end, 11, horizontal sliding backing plate, 12, chute, 13, pin rod, 14, round Hole, 15, fixed bolt, 16, upper steel backing plate, 17, bottom square steel pipe, 18, bolt hole.

detailed description

Referring to accompanying drawings 1 to 6 of the description, the precast concrete staircase structure performance inspection loading bracket of the present invention will be described in detail below.

The prefabricated concrete staircase structure performance inspection loading bracket of the present invention, its structure comprises vertical height adjustable telescopic bracket, oblique channel steel stiffener 6, horizontal bracket and horizontal sliding backing plate 11, and described horizontal bracket is arranged on the fixed One side of the telescopic support is adjustable in vertical height, and the two are connected by an oblique channel steel stiffener 6, and the horizontal sliding backing plate 11 is arranged on the horizontal bracket.

The vertical height-adjustable telescopic support includes a vertical telescopic sleeve rod, an upper connecting square steel pipe 3, a middle cross stiffener 4 and a lower connecting channel steel 5, and the vertical telescopic sleeve rod includes two, each The vertical telescopic rods respectively include an external square steel pipe 1 and an internal square steel pipe 2, the internal square steel pipe 2 is located in the inner cavity of the external square steel pipe 1, and round holes 14 are arranged on both sides of each of the external square steel pipes 1, and the internal square steel pipe 1 Both sides of the square steel pipe 2 are provided with a plurality of circular holes 14 arranged at equal intervals, which can adjust the extension length of the inner square steel pipe 2. The round hole 14 on the steel pipe 2 is fixed, and the upper connecting square steel pipe 3 is arranged on the upper part between the two inner square steel pipes 2, the upper connecting square steel pipe 3 is used to support the upper end of the prefabricated stairs, and the lower connecting channel steel 5 is arranged on In the lower part between the two outer square steel pipes 1 , the middle cross stiffener 4 is arranged between the two outer square steel pipes 1 , and one end of the oblique channel steel stiffener 6 is connected with the outer square steel pipe 1 .

The horizontal bracket includes a horizontal square steel pipe 7, an end cross stiffener 8, a middle transversely connected square steel pipe 9 and an end transversely connected square steel pipe 10, and the described horizontal square steel pipe 7 includes two, two horizontal square steel pipes The steel pipes 7 are arranged symmetrically front and back, and two horizontal square steel pipes 7 are respectively provided with end cross stiffeners 8, middle transversely connected square steel pipes 9 and end transversely connected square steel pipes 10, with end cross stiffeners 8 One end of the horizontal square steel pipe 7 is connected to the vertically height-adjustable telescopic bracket, and the two horizontal square steel pipes 7 between the middle horizontally connected square steel pipe 9 and the end horizontally connected square steel pipe 10 are provided with horizontal sliding backing plates 11 .

The horizontal sliding backing plate 11 is used to support the lower end of the prefabricated stairs, and includes an upper steel backing plate 16 and a lower square steel pipe 17. The lower square steel pipe 17 is arranged on the lower part of the upper steel backing plate 16, and the upper steel backing plate The two ends of 16 are respectively provided with bolt holes 18, and the upper surfaces of the two horizontal square steel pipes 7 between the middle horizontally connected square steel pipes 9 and the end horizontally connected square steel pipes 10 are respectively provided with chute 12, which can adjust the horizontal The position of the sliding backing plate 11, the two ends of the upper steel backing plate 16 are respectively located on the top of the chute 12, and a fixing bolt 15 is arranged between the upper steel backing plate 16 and the chute 12, and the lower end of the fixing bolt 15 is located at In the chute 12, the upper end passes through the bolt hole 18, and the horizontal sliding backing plate 11 is fixed on the horizontal bracket by a nut.

Before carrying out the structural performance inspection to the prefabricated concrete stairs, at first according to the height difference between the upper and lower support points of the prefabricated stairs, adjust the protruding length of the inner square steel pipes 2 of the two vertical telescopic sleeve rods, and fix them by the pin rods 13. Then adjust the position of the horizontal sliding backing plate 11 according to the horizontal projection length between the upper and lower support points of the prefabricated stairs, and tighten the fixing bolts 15 at both ends. Finally, the prefabricated staircase is hoisted onto the loading bracket, so that the upper supporting point of the staircase is located on the upper connecting square steel pipe 3, and the lower supporting point is located on the horizontal sliding backing plate 11. After that, the structural performance test of the prefabricated staircase can be carried out directly.

Before the structural performance inspection of the prefabricated stairs, according to the height difference and projected length between the supporting points of the prefabricated stairs, the extension length of the vertical height-adjustable telescopic support and the position of the horizontal sliding backing plate 11 are adjusted respectively. After the adjustment is completed, the prefabricated stairs can be hoisted to the loading bracket for loading test. The scheme can conveniently and accurately adjust the height and width of the support points at both ends of the prefabricated stairs, so as to adapt to the loading test of prefabricated stairs with different specifications, and has high versatility. When inspecting the structural performance of prefabricated stairs with various specifications on the construction site, it avoids the need to weld multiple sets of temporary supports before the test, saving materials and labor.

The implementation methods listed above are only for understanding the present invention, and are not intended to limit the technical solutions described in the present invention. Those of ordinary skill in the relevant fields can also make various changes on the basis of the technical solutions described in the claims. or deformation, all equivalent changes or deformations shall fall within the protection scope of the claims of the present invention. The parts of the present invention that are not described in detail are known technologies of those skilled in the art.

Claims (4)

1. Prefabricated concrete staircase structure performance inspection loading bracket, which is characterized by: including vertical height adjustable telescopic bracket, oblique channel steel stiffener, horizontal bracket and horizontal sliding backing plate, the horizontal bracket is set on the fixed vertical To one side of the height-adjustable telescopic support, and the two are connected by oblique channel steel stiffeners, and the horizontal sliding backing plate is arranged on the horizontal bracket. 2. The prefabricated concrete staircase structure performance inspection loading bracket according to claim 1, characterized in that: said vertical height adjustable telescopic bracket includes a vertical telescopic sleeve rod, an upper connecting square steel pipe, a middle cross stiffener and The lower part is connected to the channel steel, and the vertical telescopic sleeve rods include two, each vertical telescopic sleeve rod respectively includes an external square steel pipe and an internal square steel pipe, and the internal square steel pipe is located in the inner cavity of the external square steel pipe, each of the There are round holes on both sides of the outer square steel pipe, and multiple round holes arranged at equal intervals on both sides of the inner square steel pipe. The holes are fixed, the upper connecting square steel pipe is arranged at the upper part between the two inner square steel pipes, the lower connecting channel steel is arranged at the lower part between the two outer square steel pipes, and the middle cross stiffener is arranged at the two Between the root outer square steel pipes, one end of the oblique channel steel stiffener is connected with the outer square steel pipes. 3. The loading bracket for structural performance inspection of precast concrete stairs according to claim 1, characterized in that: the horizontal bracket includes horizontal square steel pipes, cross stiffeners at the ends, square steel pipes with intermediate transverse connections and transverse connections at the ends Square steel pipes. The horizontal square steel pipes include two horizontal steel pipes. The two horizontal square steel pipes are symmetrically arranged front and back. Between the two horizontal square steel pipes are respectively provided cross stiffeners at the ends, square steel pipes connected horizontally in the middle and square steel pipes connected horizontally at the ends. A steel pipe, wherein one end of the horizontal square steel pipe with cross stiffeners at the end is connected to the vertically height-adjustable telescopic bracket, and the two horizontal square steel pipes between the middle horizontally connected square steel pipe and the end horizontally connected square steel pipe Provided with a horizontal sliding backing plate. 4. The loading bracket for structural performance inspection of precast concrete stairs according to claim 3, wherein the horizontal sliding backing plate includes an upper steel backing plate and a lower square steel pipe, and the lower square steel pipe is arranged on the upper steel backing The lower part of the plate, and the two ends of the upper steel backing plate are respectively provided with bolt holes, and the upper surfaces of the two horizontal square steel pipes between the middle horizontally connected square steel pipe and the end horizontally connected square steel pipe are respectively provided with chute, The two ends of the upper steel backing plate are respectively located on the upper part of the chute, and a fixing bolt is arranged between the upper steel backing plate and the chute, the lower end of the fixing bolt is located in the chute, the upper end passes through the bolt hole, and the nut is Secure the horizontal slide pads to the horizontal brackets.