A guide rail beam (10), a track beam unit (100), and a track beam (1000) for a rail vehicle (7) are disclosed. The guide rail beam (10) includes a fixing plate (1), a flange plate (2), a web plate (3), and a stiffening rib (5). The fixing plate (1) is disposed on a mounting surface (20). The flange plate (2) is disposed above the fixing plate (1). A road wheel (71) travels on the flange plate (2). An upper end of the web plate (3) is connected with the flange plate (2), and a lower end of the web plate (3) is connected with the fixing plate (1). The web plate (3) is in contact with and be associated with a guide wheel (72) to guide a traveling track of the guide wheel (72). An upper end of the stiffening rib (5) is connected with the flange plate (2), and a lower end of the stiffening rib (5) is connected with the fixing plate (1).

Disclosed is a control method of an airbag-type intelligent control device for vortex-induced vibration of bridges. The airbag-type intelligent control device for vortex-induced vibration (VIV) of bridges includes a control system, which comprises a monitoring device and a control workstation; the monitoring device is used to detect the wind speed and direction near the bridge and the vibration state of the bridge; the control workstation is connected to the monitoring device. The VIV order of bridges is determined based on the detected wind speed, wind direction, and the vibration state of the bridge. The airbag system is mounted on both sides of the bridge and connected to the control workstation; according to the obtained VIV order, the sectional shape parameters of the airbag system are determined, and the airbag system is regulated to have the appropriate sectional shape.

The present invention is a support structure including elongate hollow cylinder and flat plates secured thereto. A first rigid flat plate is horizontally disposed in overlying relation to each hollow cylinder and a second rigid flat plate is horizontally disposed in underlying relation to each hollow cylinder. Stress-distributing strengthening members are circumferentially positioned about the hollow cylinder and secured to their associated rigid flat plates. A key may extend from a first end of each hollow cylinder and a mating socket may be formed in a second end of each hollow cylinder to facilitate end-to-end interconnection of a plurality of hollow cylinders.

The present invention is a support structure including elongate hollow cylinder and flat plates secured thereto. A first rigid flat plate is horizontally disposed in overlying relation to each hollow cylinder and a second rigid flat plate is horizontally disposed in underlying relation to each hollow cylinder. Stress-distributing strengthening members are circumferentially positioned about the hollow cylinder and secured to their associated rigid flat plates. A key may extend from a first end of each hollow cylinder and a mating socket may be formed in a second end of each hollow cylinder to facilitate end-to-end interconnection of a plurality of hollow cylinders.

Provided is a viaduct structure. The viaduct structure consists of steel bridge columns, steel plate girders, a bridge deck bottom steel plate, bridge deck side steel plates and cement-gravel concrete, where the steel bridge columns, the steel plate girders and the bridge deck bottom steel plate are welded to one another to form the ceiling type steel architecture, the bridge deck side steel plates are welded to the bridge deck bottom steel plate, and the cement-gravel concrete is poured in a groove-like structure formed by the bridge deck side steel plates and the bridge deck bottom steel plate. The viaduct structure has the advantages of a firm structure, a thin bridge deck, the thin steel plate girders, a low height of the bridge deck, no plywoods required for pouring, convenient construction, low waste, a low material consumption, a low construction cost, a short construction period, etc.

Provided is a viaduct structure. The viaduct structure consists of steel bridge columns, steel plate girders, a bridge deck bottom steel plate, bridge deck side steel plates and cement-gravel concrete, where the steel bridge columns, the steel plate girders and the bridge deck bottom steel plate are welded to one another to form the ceiling type steel architecture, the bridge deck side steel plates are welded to the bridge deck bottom steel plate, and the cement-gravel concrete is poured in a groove-like structure formed by the bridge deck side steel plates and the bridge deck bottom steel plate. The viaduct structure has the advantages of a firm structure, a thin bridge deck, the thin steel plate girders, a low height of the bridge deck, no plywoods required for pouring, convenient construction, low waste, a low material consumption, a low construction cost, a short construction period, etc.

A bridge system is provided that utilizes foundation structures that are formed of the combination of precast and cast-in-place concrete. A method of constructing the combination precast and cast-in-place concrete foundation structures involves receiving at a construction site a precast concrete foundation unit having elongated upright wall members that define a channel therebetween, and multiple upright supports located within the channel; placing the precast concrete foundation unit at a desired use location; delivering concrete into the channel while the precast concrete foundation unit remains at the desired use location; and allowing the concrete to cure-in-place such that the elongated upright wall members are connected to the cured-in-place concrete by reinforcement embedded within both the cured-in-place concrete and the upright wall members. The bridge units may be placed before the pouring step to embed the bottoms of the bridge units in the cast-in-place concrete.

A bridge assembly includes a plurality of platform members which may be secured to support beams via individual platform chassis which are configured to allow tool-less attachment bolt heads thereto. A plurality of specially configured clamps are attached to the free ends of the bolts and the clamps are used to secure the platform members to the platform chassis. The platform chassis are each secured to the outer support beams via L-brackets that are mounted between the chassis and support beams. The support beams include flanged channels wherein the heads of a plurality of bolts may be attached without the need for tools. The platform members may be laid in either a parallel or perpendicular orientation with respect to the outer support beams with two different clamp styles being used depending on the orientation selected.

A bridge assembly includes a plurality of platform members which may be secured to support beams via individual platform chassis which are configured to allow tool-less attachment bolt heads thereto. A plurality of specially configured clamps are attached to the free ends of the bolts and the clamps are used to secure the platform members to the platform chassis. The platform chassis are each secured to the outer support beams via L-brackets that are mounted between the chassis and support beams. The support beams include flanged channels wherein the heads of a plurality of bolts may be attached without the need for tools. The platform members may be laid in either a parallel or perpendicular orientation with respect to the outer support beams with two different clamp styles being used depending on the orientation selected.

A shallow single plate cold roll formed steel tub girder member is fabricated from unheated steel plate material by a cold roll-forming process which eliminates longitudinal welds and induces camber in the tub girder member.