CN205276472U - Large -span steel truss structure - Google Patents

Abstract

The utility model discloses a large -span steel truss structure, include a set of steelframe and be located between the adjacent steelframe to with the perpendicular jack truss of being connected of steelframe, the steelframe adopts two pin composite truss, and it includes: two support columns and the main couple that is located its top, the support column lower part is equipped with the column base, the support column includes: a set of steel column and the therebetween strengthening rib that distributes in turn, the main couple includes: a set ofly go up boom plate, a set of boom plate down and lie in the web between the two. Overall structure for convenient and fast more is under construction.

Description

A long-span steel truss structure

technical field

The utility model relates to the field of steel structure buildings, in particular to a large-span steel truss structure.

Background technique

Large-span steel trusses have become a fast-growing structure type because of their reasonable force, full use of material strength, less consumables, light weight, low cost, and various structural forms. They are mostly used in large-span workshops in industrial buildings, Long-span corridors, aircraft assembly workshops and large warehouses have high manufacturing and installation requirements, especially the difficulty of installation. Therefore, the construction of long-span space structures is one of the important symbols of a country's architectural technology level. From One aspect reflects the level of construction technology of a country.

Super-long-span steel trusses are often used in heavy industrial plants, stadiums, industrial pipeline corridors, central squares and other industries. In order to reduce the weight of the entire steel structure, traditional large-span steel trusses are constructed with a single piece, but problems such as lateral bending are prone to occur during overall lifting. If this problem cannot be solved, it will greatly hinder the steel structure truss. Application in the field of construction engineering technology; at the same time, the methods often used in on-site construction are direct overall hoisting in place by cranes and segmental hoisting and high-altitude closing. However, when the installation position of the steel truss structure is limited by site conditions, it cannot be directly hoisted by a crane. At this time, the traditional method is: set up a full house of scaffolding, and assemble the various rods on the scaffold on site. However, this traditional method consumes a long time and requires a lot of labor. The cross-sectional geometric dimensions, verticality, bending sag, camber, and welding quality of the component joints are more difficult to control than assembling on the ground.

Utility model content

Purpose of the utility model: The purpose of the utility model is to solve the deficiencies of the existing technology and provide a large-span steel truss structure with high structural rigidity, high installation precision and orderly construction.

Technical solution: In order to achieve the above objectives, a long-span steel truss structure described in the utility model includes a group of steel frames and a secondary truss located between adjacent steel frames and vertically connected to the steel frames; the steel frames A double-truss composite truss is adopted, which includes: two supporting columns and a main truss at the top; the lower part of the supporting columns is provided with column feet; the supporting columns include: a group of steel columns and reinforcing ribs alternately distributed between them; The main truss includes: a set of upper chord plates, a set of lower chord plates and a web between them.

The steel frame adopts a double-truss composite steel frame. Compared with the traditional single-item truss, the structure is more stable, and it is not easy to bend and deform when it bears a large load; the supporting columns and the main truss adopt the combination of primary and secondary. , so that the rigidity of the structure is greatly improved; at the same time, there is a secondary truss structure vertically fixedly connected to the steel frame, which further ensures that there will be no shaking or twisting between the whole.

Further, in the above-mentioned large-span steel truss structure, the column foot is an inverted tapered composite column foot, and its lower part is fixedly connected to the ground concrete structure through an end plate.

Further, in the above-mentioned long-span steel truss structure, the side of the steel column is provided with connecting lugs; the connecting lugs are fixedly connected to the steel columns through bolts.

Further, in the above-mentioned long-span steel truss structure, the reinforcing ribs are alternately connected with the steel columns to form a triangular structure. The structural stability of the triangle is used to ensure that the internal structure of the support column is firm, and the internal structure will not be bent and deformed under the action of a large load.

Further, in the above-mentioned long-span steel truss structure, the webs are fixed alternately with the upper chord and the lower chord to form a triangular structure. The structural stability of the triangle is further utilized to ensure the internal rigidity of the main truss.

Further, in the above-mentioned long-span steel truss structure, the support column is welded by H-shaped steel, and the main truss is welded by double-web T-shaped steel.

The installation method of a long-span steel truss structure described in the utility model includes dividing the steel truss structure into three construction areas: the first construction area, the second construction area and the third construction area; the second construction area is located between the first construction area and the third construction area. Between the second construction area; the first construction area is located on the upper part of the third construction area; the specific installation method is as follows:

1) Installation of sliding track: Build different supporting systems according to different structures at the set position, and install a full-length sliding track on the upper part of the supporting system;

2) Assembly of sliding support frame:

① Set up the assembled tire frame in the second construction area, and complete the segmental assembly of the horizontal truss of the sliding support frame;

②Install the corresponding sliding support column on the sliding track, set a temporary support at the set position, and use the tower crane to fix and install the horizontal truss of the sliding supporting frame in sections;

③ Weld each connecting node, and then remove the temporary support to complete the assembly of the sliding support frame.

3) Installation of the steel truss structure in the second construction area: install the supporting columns in the second construction area at the set position, and install the secondary trusses between adjacent supporting columns; The truss sees that the rods are welded and fixed. According to this method, the installation of the steel truss structure in the second construction area is completed;

4) Installation of the steel truss structure on the first floor of the construction area: use the hoist to pull and slide the sliding support frame to the structure installation position in the first construction area; then follow the method described in step 3) to complete the first floor truss structure of the construction area Sectional installation;

5) Installation of the steel truss structure in the construction area 3: use the winch to pull and slide the sliding support frame to the structure installation position in the construction area 3; then use the sliding support frame as the support to complete the longitudinal main truss and horizontal secondary truss in the construction area 3 The segmental installation; finally, the remaining components are welded;

6) Installation of the upper steel truss structure in the first construction area: build temporary supports on the completed first-floor steel trusses in the first construction area, and rely on temporary supports to complete the installation of the second-story steel truss structures in the first construction area ;Complete the installation of the upper steel structure in sequence according to the above method;

7) Complete the welding of the embedded rods between each structure, and check the processing accuracy, and finally unload each temporary support and sliding support frame to complete the installation of the long-span steel truss structure.

Further, in the installation method of the above-mentioned large-span steel truss structure, when the steel truss structure in the second construction area is installed, a conversion bracket is installed on one side of the sliding support frame, and the conversion bracket is completed in the steel structure of the second construction area. After uninstalling.

Beneficial effects: a long-span steel truss structure and its installation method described in the utility model have the following advantages: in view of the characteristics of large span and many floors of the overall structure, the combination of double-truss composite truss and secondary truss is adopted, so that The overall structure is more stable; at the same time, the supporting column and the main truss are combined in a primary and secondary manner, so that the stiffness of each component of the entire steel frame can have sufficient bearing capacity.

At the same time, the utility model uses the sliding track to complete the installation of each construction area. The sliding track replaces the traditional scaffolding, which reduces a lot of scaffolding work. At the same time, the sliding track also has the advantages of simple structure, convenient construction, and a large area At the same time, the overall construction method is divided into partitions. According to the structural form of each area, different construction methods and hoisting machinery are used to ensure the overall construction precision and accuracy. It is a new and efficient construction method.

Description of drawings

Fig. 1 is the structural representation of the long-span steel truss structure described in the utility model;

Fig. 2 is the overall structural diagram of steel frame described in the utility model;

Fig. 3 is the structural diagram of the support column described in the utility model;

Fig. 4 is a schematic diagram of the overall construction area division of the steel truss structure described in the present invention;

In the figure: 1-steel frame, 2-secondary truss, 3-support column, 3-1-steel column, 3-2-reinforcing rib, 4-main truss, 4-1-upper chord, 4-2-lower chord , 4-3-web plate, 5-column foot, 6-connecting lug plate, S1-construction area 1, S2-construction area 2, S3-construction area 3.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the utility model.

Example

A long-span steel truss structure as shown in Fig. 1 and Fig. 2 includes a group of steel frames 1 and secondary trusses 2 located between adjacent steel frames and vertically connected with the steel frames; A composite truss, which includes: two supporting columns 3 and a main truss 4 at the top; the lower part of the supporting column 3 is provided with a column foot 5, and the column foot 5 adopts an inverted tapered composite column foot, and is connected with the lower part by fixing bolts. The concrete structure is fixedly connected; the support column 3 includes: a set of steel columns 3-1 and reinforcing ribs 3-2 alternately distributed therebetween, the steel columns 3-1 are connected by multiple sections of steel plates, and connecting ear plates are provided at the joints 6. The connecting ear plate 6 is fixedly connected to the steel column 3-1 through bolts, and at the same time, the reinforcing rib 3-2 is alternately connected to the steel column 3-1 to form a triangular structure; the main truss 4 includes: a set of upper chords Plate 4-1, a group of lower chord plates 4-2 and web 4-3 between them, the web 4-3 is alternately fixed with upper chord plate 4-1 and lower chord plate 4-2 to form a triangular structure. The primary and secondary matching method is adopted to ensure the overall structural stability, and the double-truss composite truss makes it difficult to cause problems such as lateral bending during the overall lifting.

Preferably, in the above-mentioned long-span steel truss structure, as shown in FIG. 2 , the support column 3 is welded by H-shaped steel, and the main truss 4 is welded by double-web T-shaped steel.

This embodiment also provides a method for installing a large-span steel truss structure, including dividing the steel truss structure into three construction areas: the first construction area S1, the second construction area S2, and the third construction area S3; Between the first area S1 and the second construction area S2; the first construction area S1 is located on the upper part of the third construction area S3; the specific installation method is as follows:

1) Installation of sliding track: Build different supporting systems according to different structures at the set position, and install a full-length sliding track on the upper part of the supporting system;

2) Assembly of sliding support frame:

① Set up the assembled tire frame in the second construction area S2, and complete the segmental assembly of the horizontal truss of the sliding support frame;

②Install the corresponding sliding support column on the sliding track, set a temporary support at the set position, and use the tower crane to fix and install the horizontal truss of the sliding supporting frame in sections;

③ Weld each connecting node, and then remove the temporary support to complete the assembly of the sliding support frame.

3) Installation of the S2 steel truss structure in the second construction area: install the supporting column 3 of the second construction area S2 at the set position, and install the secondary truss 2 between the adjacent supporting columns 3; then complete the main truss 4 by means of the sliding support frame Install in sections, and weld and fix the truss rods. According to this method, the installation of the S2 steel truss structure in the second construction area is completed;

4) Installation of steel truss structure on the first floor of construction area S1: use a winch to pull and slide the sliding support frame to the structural installation position of construction area S1; then follow the method described in step 3) to complete the first floor of construction area S1 Sectional installation of truss structures;

5) Installation of the S3 steel truss structure in the third construction area: use the winch to pull and slide the sliding support frame to the structural installation position of the third construction area S3; then use the sliding support frame as a support to complete the S3 longitudinal main truss 4 in the third construction area And the segmental installation of the transverse secondary truss 2; finally, the welding of the remaining components is completed;

6) Installation of the upper steel truss structure in construction area S1: build temporary supports on the steel structure trusses on the first floor of the completed construction area (S1), and rely on the temporary supports to complete the second floor of S1 in the construction area Installation of the steel truss structure; complete the installation of the upper steel structure in sequence according to the above method;

7) Complete the welding of the embedded rods between each structure, and check the processing accuracy, and finally unload each temporary support and sliding support frame to complete the installation of the long-span steel truss structure.

Preferably, in the installation method of the above-mentioned large-span steel truss structure, when the steel truss structure in the second construction area S2 is installed, a conversion bracket is installed on one side of the sliding support frame, and the conversion bracket is installed in the second construction area S2 The steel structure is unloaded after completion.

The embodiments are only used to illustrate the utility model and are not intended to limit the scope of the utility model. After reading the utility model, those skilled in the art all fall within the appended rights of the application to the modifications of various equivalent forms of the utility model. The scope limited by the requirements.

Claims (6)

1. A large-span steel truss structure, characterized in that it includes: a group of steel frames (1) and secondary trusses (2) located between adjacent steel frames and vertically connected to the steel frames; the steel frames ( 1) A double truss composite truss is used, which includes: two supporting columns (3) and a main truss (4) on top of them; the lower part of the supporting column (3) is provided with a column foot (5); the supporting column ( 3) It includes: a set of steel columns (3-1) and reinforcing ribs (3-2) alternately distributed therebetween; the main truss (4) includes: a set of upper chord plates (4-1), a set of lower chord plates (4-2) and the web (4-3) in between. 2. A long-span steel truss structure according to claim 1, characterized in that: the column foot (5) is an inverted tapered composite column foot, and its lower part is fixedly connected to the ground concrete structure through an end plate. 3. A long-span steel truss structure according to claim 1, characterized in that: the side of the steel column (3-1) is provided with connecting lugs (6); the connecting lugs (6) pass through The bolts are fixedly connected with the steel column (3-1). 4. The long-span steel truss structure according to claim 1, characterized in that: the reinforcing ribs (3-2) are alternately connected with the steel columns (3-1) to form a triangular structure. 5. A long-span steel truss structure according to claim 1, characterized in that: the web (4-3) is alternately fixed with the upper chord (4-1) and lower chord (4-2) to form a triangle structure. 6. A long-span steel truss structure according to claim 1, characterized in that: the support column (3) is welded by H-shaped steel, and the main truss (4) is welded by double-belly T-shaped steel .