CN202644410U - Protection canopy frame of triangle-shaped trusswork - Google Patents

Abstract

The utility model discloses a protective shed with a triangular truss structure, which comprises an upper beam body, which is built on a steel pipe column through an I-shaped steel beam, and the upper beam body is a triangular truss beam. The utility model solves the problem of self-heaviness and large deflection by designing the upper beam body as a triangular truss beam. The longitudinal deflection-resistant webs are added between the two groups of webs to further reduce the deflection of the triangular truss girder. Suitable for bridge construction.

Description

A protective scaffolding with a triangular truss structure

technical field

The utility model relates to a protective scaffolding, in particular to a protective scaffolding with a triangular truss structure.

Background technique

At present, domestic municipal road construction and road traffic network construction are booming, and interchanges and mutual crossings are inevitable, so cantilever pouring has become the first choice for construction. As the foundation of the cantilever pouring construction, the protective scaffolding is the most important thing. Generally, the upper beams of the protective scaffolding are mostly constructed in the following two ways:

One is the I-shaped longitudinal beam. Since the I-shaped steel longitudinal beam itself has a large self-weight, the deflection of the I-shaped steel longitudinal beam will also increase after the span is increased. In order to ensure the height of the upper beam body, the I-shaped steel longitudinal beam must be increased. In this way, the self-weight of the I-shaped steel longitudinal beam will further increase, and the material consumption will be more. At the same time, the increase in the dead load of the upper beam body will also lead to a corresponding increase in the material of the lower structure. Therefore, the I-shaped longitudinal beam is generally suitable for bridges with small spans ;

The second is the Bailey beam. According to engineering experience, the span of the Bailey beam structure is generally not greater than 20m.

To sum up, for some urban municipal bridges across railway stations, due to their large spans and wide bridge decks, the upper girders built with I-shaped longitudinal girders and Bailey sheets are generally not suitable. Moreover, after the completion of the bridge construction, due to the newly built bridge on the upper part, the crane boom cannot be used, so the upper beam body of the protective scaffolding must be moved to an open area before it can be hoisted and dismantled. The upper beam body is easy to roll over during the displacement process, which brings risks to the demolition.

Contents of the invention

The purpose of this utility model is to overcome the deficiency of the above-mentioned background technology, and provide a kind of protective scaffolding with triangular truss structure which is suitable for bridge construction with large span and is easy to dismantle.

In order to achieve the above objectives, the utility model provides a protective scaffolding with a triangular truss structure, which includes an upper beam body, which is built on a steel pipe column through an I-beam beam, and the upper beam body is a triangular truss beam. The triangular truss girder has small self-weight and small deflection, and is suitable for bridge construction with a large span; moreover, the triangular structure is more stable and is not easy to roll over during the moving process.

In the above solution, the triangular truss beam includes an upper chord and two lower chords, and the upper chord and the lower chord are fixedly connected by a web.

In the above solution, the web members are arranged in groups of three at intervals along the longitudinal direction of the upper chord and the lower chord, and the three web members are connected to each other to form a triangular structure.

In the above solution, longitudinal deflection-resistant webs are connected between two adjacent groups of webs, which further reduces the deflection of the triangular truss girder.

The beneficial effects brought by the technical solution provided by the utility model are: by designing the upper girder body as a triangular truss girder, the problems of self-heaviness and large deflection are solved, the structure is simple, and the cost is low; at the same time, the triangular structure is more stable. It is not easy to rollover during the process; moreover, a longitudinal deflection-resistant web member is added between two adjacent groups of the web members, which further reduces the deflection of the triangular truss beam.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a side view structural schematic diagram of Fig. 1;

Fig. 3 is a structural schematic diagram of a triangular truss beam.

In the figure, an upper beam body 1, an I-beam beam 2, a steel pipe column 3, an upper chord 4, a lower chord 5, a web 6, and a longitudinal deflection-resistant web 7.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a protective scaffolding of a triangular truss structure provided by the utility model includes an upper beam body 1, and the upper beam body 1 is built on a steel pipe column 3 through an I-beam beam 2, and the upper beam body 1 A triangular truss beam. The triangular truss girder has small self-weight and small deflection, and is suitable for bridge construction with a large span; moreover, the triangular structure is more stable and is not easy to roll over during the moving process. The triangular truss beam includes an upper chord 4 and two lower chords 5 , and the upper chord 4 and the lower chord 5 are fixedly connected by a web 6 .

The above-mentioned webs 6 are arranged in groups of three at intervals longitudinally along the upper chord 4 and the lower chord 5 , and the three webs 6 are connected to each other to form a triangular structure. A longitudinal deflection-resistant web member 7 is connected between two adjacent groups of the web members 6, which further reduces the deflection of the triangular truss beam.

The utility model solves the problem of self-heaviness and large deflection by designing the upper beam body 1 as a triangular truss beam, with simple structure and low cost; at the same time, the triangular structure is more stable, and it is not easy to rollover during the moving process; A longitudinal deflection-resistant web member 7 is added between adjacent two groups of the web members 6 to further reduce the deflection of the triangular truss beam.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. the protecting canopy frame of a triangular truss structure comprises top beam body (1), and top beam body (1) is built on steel pipe post (3) by i iron crossbeam (2), it is characterized in that, described top beam body (1) is the triangular truss beam.

2. the protecting canopy frame of a kind of triangular truss structure according to claim 1, it is characterized in that, described triangular truss beam comprises a upper chord (4) and two lower chords (5), is fixedly connected with by web member (6) between described upper chord (4) and the lower chord (5).

3. the protecting canopy frame of a kind of triangular truss structure according to claim 1 and 2, it is characterized in that, described web member (6) arranges take three as one group along described upper chord (4) and lower chord (5) longitudinal separation, and described three web members (6) are interconnected to form triangular structure.

4. the protecting canopy frame of a kind of triangular truss structure according to claim 3 is characterized in that, is connected with vertical capable of resisting deflection web member (7) between the described web member of two adjacent groups (6).

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