CN112049078A - Truss-like steel aqueduct of wave web - Google Patents

Abstract

The invention discloses a truss-type steel aqueduct with a corrugated web, comprising a steel box girder body with a corrugated web and a truss support structure. It consists of a web and a bottom plate; the truss support structure is at least two pieces and arranged symmetrically along the central axis, consisting of a chord, a flat connection between the lower chords of the two trusses, a web and a transverse connection between the two truss webs The corrugated web is located between the parallel links of the truss support structure, and the bottom plate is supported on the horizontal link; the inner side of the parallel link is provided with a partition plate to provide lateral support for the corrugated web. It adopts all-steel structure, with good watertight performance, and the structure can be assembled and constructed on site after being prefabricated in sections in the factory. The construction speed is fast and the construction quality can be easily guaranteed. Compared with concrete structures, steel structures have less dead weight and stronger spanning capacity, so they are more suitable for the construction of large water-passing sections and large-span aqueducts.

Description

A truss-type steel aqueduct with corrugated webs

technical field

The invention belongs to the technical field of bridge engineering and building structures, and relates to a truss-type navigable steel aqueduct with corrugated webs.

Background technique

An aqueduct is a water delivery system consisting of bridges, tunnels or ditches for water, passage and navigation. Aqueducts are usually erected on rivers or valleys and are widely used in water conservancy projects and drinking water projects. In order to ensure the safety of the water delivery process, aqueducts need to meet the requirements of bearing capacity and water tightness. Traditional aqueducts usually use prestressed reinforced concrete structures. The concrete structure is prevented from cracking under tension by applying prestressing force to the bottom plate and side walls. The number of prestressed tendons is large and the arrangement is complicated. The on-site construction work is very tedious and difficult, and the quality of the project is difficult to guarantee. Due to the large lateral prestress loss of the traditional floor and the problem of prestress relaxation over time, this will lead to an increased risk of cracking in the concrete tank body, and it is difficult to repair after cracking.

SUMMARY OF THE INVENTION

The invention proposes a truss-type navigable steel aqueduct with corrugated webs. The all-steel structure has the advantages of good water tightness. With the help of good structural design, the possible cracking problem of the concrete material can be fundamentally eliminated, and compared with the concrete structure The ability to span is stronger, so it is more suitable for the construction of large overwater sections and large-span aqueducts. At the same time, by virtue of the small longitudinal stiffness of the corrugated web, the tank body can well adapt to the uneven temperature difference and deformation of the water body in the tank and the truss outside the tank, and the mechanical performance of the structure is greatly improved.

The technical scheme of the present invention is as follows:

A structure of a truss-type navigable steel aqueduct with a corrugated web, comprising a steel box girder body with a corrugated web and a truss support structure, the truss support structure provides support for the steel box girder;

The steel box girder body is symmetrically arranged along the central axis, adopts a trough or U-shaped section, and is composed of a corrugated web and a bottom plate;

The corrugated web is located between the truss support structures, and the inner side of the truss support structure is provided with a partition plate to provide lateral support for the corrugated web.

Further technology of the present invention:

Preferably, the truss support structure is composed of chords on both sides, a flat connection between the chords on both sides, a web between the chords on the same side, and a transverse connection between the webs, and the corrugated web is located at the Between the parallel links of the truss support structure, the bottom plate is supported on the horizontal links.

Preferably, the bottom plate of the steel box girder body is composed of a cross beam and a longitudinal stiffener to form a support system, the cross beam and the longitudinal stiffener are integrated, and the cross-connection of the truss support structure supports the beam.

Preferably, the truss support structure consists of chords on both sides and webs between chords on the same side.

The present invention has the following remarkable effects with respect to the prior art:

(1) High carrying capacity and large spanning capacity. Compared with the concrete structure, it adopts an all-steel structure, which has a smaller self-weight and stronger spanning ability, so it is more suitable for the construction of large water-passing sections and large-span aqueducts.

(2) The construction is convenient. The structure can be prefabricated in sections in the factory for on-site assembly construction. The degree of industrialization is high, the construction speed is fast, and the construction quality can be easily guaranteed.

(3) The water tightness performance is good, and the present invention adopts an all-steel structure to fundamentally eliminate the cracking problem that may occur in the concrete material.

(4) The ability to resist uneven temperature difference and deformation is strong. The side wall of the water conveying tank adopts a corrugated web with small longitudinal stiffness, so that the aqueduct can well adapt to the uneven temperature difference and deformation between the water body in the tank and the truss outside the tank. In the force mode, the purpose of separating the slot and bridge is achieved.

(5) The aqueduct can be used for navigation, and at the same time, it can cross the river surface, and the upper and lower navigation does not affect each other. The use of corrugated plates in the aqueduct can improve the collision ability of ships.

Description of drawings

Figure 1 is a cross-sectional view of the truss-type steel aqueduct with corrugated webs when the truss-type support structure is higher than the steel box girder body;

Figure 2 is a longitudinal cross-sectional view of a truss-type steel aqueduct with corrugated webs when it is a truss-type beam-arch composite structural system. ;

Figure 3 is a plan view of a truss-type steel aqueduct with corrugated webs;

Figure 4 is a cross-sectional view of the truss-type support structure of the truss-type steel aqueduct with corrugated webs and the steel box girder body at the same height;

Figure 5 is a longitudinal sectional view of a truss-type steel aqueduct with corrugated webs when it is a truss-girder structure system.

Detailed ways

Below in conjunction with the accompanying drawings, the structure of the present invention is further described as follows:

As shown in Figures 1 to 3, the present invention proposes a truss-type navigable steel aqueduct with corrugated webs.

It includes a steel box girder body and a truss support structure with corrugated webs; the steel box girder body is symmetrically arranged along the central axis, adopts a trough or U-shaped section, and is composed of a corrugated web 10 and a bottom plate 20;

The truss support structure is higher than the steel box girder body. The truss support structure is at least two pieces and arranged symmetrically along the central axis. The transverse links between the web rods are composed of 60, and each rod can adopt various cross-sectional forms such as I-shaped or box-shaped.

The bottom plate of the steel box girder consists of a cross beam 21 and a longitudinal stiffener 22 to form a support system, and the truss support structure provides lateral support for the corrugated web 10 through the diaphragm 11 .

As shown in Figures 3-4, the present invention proposes another truss-type navigable steel aqueduct with corrugated webs.

It includes a steel box girder body and a truss support structure with corrugated webs; the steel box girder body is symmetrically arranged along the central axis, adopts a trough or U-shaped section, and is composed of a corrugated web 10 and a bottom plate 20;

The truss support structure has the same height as the steel box girder and is composed of chords 30 and webs 50 . Each rod can adopt various cross-sectional forms such as I-shaped or box-shaped.

The bottom plate of the steel box girder consists of a cross beam 21 and a longitudinal stiffener 22 to form a support system, and the truss support structure provides lateral support for the corrugated web 10 through the diaphragm 11 .

For the truss-type steel aqueduct with corrugated webs proposed by the present invention, a truss-girder structure system can be selected according to design requirements, as shown in FIG. 5 . A truss-type arch-beam composite structural system can also be selected, as shown in Figure 2.

The truss-type navigable steel aqueduct with corrugated webs proposed by the present invention adopts an all-steel structure and can fundamentally eliminate the possible cracking problem of concrete materials by virtue of good structural design, and has stronger spanning ability compared with concrete structures. It is more suitable for the construction of large overwater sections and large-span aqueducts. In addition, by virtue of the small longitudinal stiffness of the corrugated web, the tank body can well adapt to the uneven temperature difference between the water body in the tank and the truss outside the tank, and the mechanical performance of the structure is greatly improved. The structure can be prefabricated in sections in the factory for on-site assembly and construction. It has the characteristics of high industrialization, fast construction speed and easy to guarantee construction quality.

The above description is for the convenience of those of ordinary skill in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications to these descriptions can be readily made, and the general principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the description herein, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (4)

1. The utility model provides a truss-like steel aqueduct of wave form web which characterized in that: the steel box girder comprises a steel box girder body adopting a corrugated web plate and a truss support structure, wherein the truss support structure provides support for the steel box girder body;

the steel box girder bodies are symmetrically arranged along a central axis, adopt groove-shaped or U-shaped sections and consist of a corrugated web plate and a bottom plate;

the corrugated web plates are located between the truss support structures, and the inner sides of the truss support structures are provided with partition plates for providing lateral support for the corrugated web plates.

2. The truss-type steel aqueduct with corrugated web as claimed in claim 1, wherein: the truss support structure is composed of chords on two sides, parallel links between the chords on the two sides, web members between the chords on the same side and transverse links between the web members, the corrugated web is located between the parallel links of the truss support structure, and the bottom plate is supported on the transverse links.

3. The truss-type steel aqueduct with corrugated web as claimed in claim 2, wherein: the bottom plate of the steel box girder body is composed of a supporting system consisting of a cross beam and a longitudinal stiffening rib, the cross beam and the longitudinal stiffening rib are integrated into a whole, and the cross beam is supported by the cross connection of the truss supporting structure.

4. The truss-type steel aqueduct with corrugated web as claimed in claim 1, wherein: the truss support structure is composed of chord members on two sides and web members between the chord members on the same side.

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