Fabricated steel bridge

Abstract

The utility model provides an assembly type steel bridge which comprises a main supporting beam frame. The longitudinal beam unit is composed of a plurality of longitudinal beam modules transversely fixed to the steel structure truss set at equal intervals, and the longitudinal beam modules are formed by longitudinally connecting box beam units in series; the two ends of each box girder unit are each provided with a boss which protrudes outwards in the longitudinal direction and is provided with a first connecting hole which is vertically through. Notches are formed in the four corners of the longitudinal second end face, the notches are sunken inwards, and second connecting holes penetrating vertically are formed in the two vertical side walls of each notch; the adjacent box girder units vertically penetrate through the second notch connecting holes and the first boss connecting holes through fastening bolts and are bolted through double-end nuts; the transverse bearing beam set is composed of transverse beams distributed at equal intervals in the longitudinal direction. The longitudinal distribution beam group consists of longitudinal beams which are transversely distributed at equal intervals, and the longitudinal beams and the cross beams are laid on the upper surfaces of the cross beams in a crossed manner; and the bridge floor top plate is fixed above the longitudinal distribution beam group. The assembly type steel bridge solves the problem that an existing steel bridge is difficult to install quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction field, concretely relates to a fabricated steel bridge. BACKGROUND

[0002] In the scene of installing the bridge, the hoisting structure needs to be installed at the bridge installation place, and the temporary fabricated steel bridge needs to be quickly erected when the hoisting structure is installed. However, the installation speed of the existing steel bridge is still not fast enough; on the other hand, the waterproof and anti-rust performance of the temporary fabricated steel bridge is poor, after being used in a humid environment, if not maintained in detail, the steel structure is prone to rust, which reduces its reusability; in addition, the assembly operation of part of the temporary fabricated steel bridge is complex, professional equipment and personnel are needed, which is difficult to meet the demand of quickly building in an emergency. Therefore, it is of great significance to develop a temporary fabricated steel bridge which is stable in connection, good in durability and convenient to quickly install, to improve the temporary traffic guarantee capacity. SUMMARY

[0003] The utility model solves the problem that the existing steel bridge is difficult to quickly install.

[0004] The utility model provides a kind of fabricated steel bridge, which solves the problem of the existing steel bridge difficult to quickly install.

[0005] The connecting structure of the box girder unit greatly improves the installation efficiency. The box girder unit is provided with a boss and a notch at two ends respectively, and can be inserted and installed without complex calibration operation. At the same time, the adjacent box girder units are vertically penetrated through the notch second connecting hole and the boss first connecting hole by fastening bolts, and are connected by the double-end nut bolt connection mode. Compared with the traditional complex welding or multi-component assembly, the operation is more simple, and the construction personnel can quickly complete the longitudinal modular assembly by using simple tools. The transverse bearing beam group is composed of transverse beams distributed equidistantly along the longitudinal direction. The transverse beams are directly arranged and anchored on the upper surface of the prefabricated box girder unit to form a transverse rigid connection. The installation process does not need complex positioning and adjustment process, and the transverse structure can be quickly built, which enhances the overall stability of the bridge and improves the installation speed. The longitudinal distribution beam group is orthogonally laid on the upper surface of the transverse beam of the transverse bearing beam group, and adopts a simple I-shaped cross section and is easy to install. Since the design conforms to the mechanical principle, it does not need excessive reinforcement and adjustment during installation, and can be quickly connected with the transverse bearing beam group and the bridge deck top plate to complete the construction of the entire bridge deck structure.

[0006] Further, the steel structure truss group comprises a transversely extending beam frame and a plurality of support steel columns arranged equidistantly along the bottom of the beam frame; the bottom end of the support steel column is anchored to the water bottom bed by a vertical penetration method; and the bottom surface of the box girder unit is rigidly connected to the top surface of the beam frame by welding or high-strength bolt connection. The anchoring method of the support steel column vertically penetrating into the water bottom bed can fully utilize the bearing capacity of the bed to provide stable and reliable foundation support for the steel bridge, effectively resisting the influence of adverse factors such as water flow scouring and foundation settlement on the stability of the bridge. At the same time, the welding of the box girder unit and the top surface of the beam frame ensures efficient force transmission between the superstructure and the support structure, enhances the rigidity and bearing capacity of the overall structure of the bridge, and ensures the safety and durability of the bridge under heavy traffic.

[0007] Further, the end of the boss is provided with a tapered surface, and the inclination angle of the tapered surface is 1:10 to 1:5, which facilitates automatic alignment during assembly. During the on-site construction process, the construction personnel do not need to use complex measuring and calibration tools for accurate alignment, but only rely on the guiding effect of the tapered surface to quickly and accurately splice the adjacent box girder units, greatly shortening the construction time.

[0008] Further, the bolt locking surface of the second connecting hole is provided with an elastic lock washer, which is compressed and deformed after the bolt is tightened to offset the loosening caused by vibration. The elastic lock washer is compressed and deformed after the bolt is tightened, forming a continuous elastic pressure, tightly locking the bolt and the connecting hole. Even in the case of frequent vibration, the fastening state of the bolt connection can be maintained, ensuring the stability and reliability of the bridge structure connection, reducing the maintenance cost and safety hidden danger in the later period.

[0009] Further, the joint between adjacent box girder units is filled with epoxy resin sealant to prevent water vapor from penetrating into the connecting joint.

[0010] Further, the surface of the top plate is pressed with diamond-shaped anti-skid convex patterns with a height of 2-3 mm, which improves the anti-skid performance of the bridge surface, increases the friction between the vehicle tires and the bridge surface, effectively prevents the vehicle from skidding during driving, especially in rainy, icy and wet conditions, and ensures driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a longitudinal side view of the utility model;

[0012] Fig. 2 is a horizontal side view of the utility model;

[0013] Fig. 3 is a partial cross-sectional view of the box girder unit of the utility model;

[0014] Fig. 4 is a partial cross-sectional view of the connecting part between adjacent box girder units of the utility model;

[0015] Fig. 5 is a top view of the bridge surface top plate of the utility model.

[0016] Illustration: 1, main support beam frame; 1.1, steel structure truss group; 1.1.1, cross beam frame; 1.1.2, support steel column; 2, longitudinal beam unit; 2.1, longitudinal beam module; 2.1.1, box girder unit; 2.1.11, boss; 2.1.12, first connecting hole; 2.1.13, notch; 2.1.14, second connecting hole; 2.1.15, conical surface; 2.1.16, elastic anti-loose washer; 3, horizontal bearing beam group; 3.1, cross beam; 4, longitudinal distribution beam group; 4.1, longitudinal beam; 4.1.1, upper flange; 4.1.2, lower flange; 5, bridge surface top plate; 5.1, diamond-shaped anti-skid convex pattern. DETAILED DESCRIPTION

[0017] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising" or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0018] Also, in the disclosure of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application; secondly, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as limiting the number.

[0019] It should be understood by those skilled in the art that the embodiments of the present application shown in the above description and drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application has been shown and explained in the embodiments, and the embodiments of the present application can have any modification or change without departing from the principle.

[0020] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0021] Please refer to Figs. 1-2The utility model provides a kind of bent cap hoop adjusting reinforcement mechanism, including vertical fixed to the bent cap column 1 of foundation surface, bent cap frame 2 of horizontal erection in the top of bent cap column 1, annular hoop body 3 of sheathing in the outer wall of bent cap column 1.Hoop body is made of two symmetrical circular hoop pieces 3.2, and the opening end of two hoop pieces 3.2 is oppositely arranged to close around bent cap column 1, and the opening end side is formed with a pair of opposite connecting ears 3.3 along the radial direction outward extension, and semicircular groove 3.4 is equipped in the inboard of connecting ear 3.3;When two hoop pieces 3.2 close around bent cap column 1, the two connecting ears 3.3 of each hoop piece 3.2 are respectively coupled with the corresponding connecting ear 3.3 of another hoop piece 3.2 radially symmetrically, form left and right two independent support parts 3.1, and the inboard semicircular groove 3.4 of coupled connecting ear 3.3 is closed to form coaxial through cylindrical limiting hole, the axis of the hole is perpendicular to the axis of bent cap column 1 and parallel to the extension direction of bent cap frame 2, and the top end of first connecting rod 5.1 is inlaid in each limiting hole, is radially constrained to the arc surface of semicircular groove 3.4 to the rod body, and simultaneously locking bolt 3.6 is penetrated with the vertical limiting hole 3.7 in the top of rod body with connecting ear 3.3, to form axial shear locking, and the upper surface of support part 3.1 is provided with the planar support surface of supporting bent cap frame 2.It also includes annular base 4 that is sleeved in the connection place of bent cap column 1 and foundation and the lower end surface contacts the foundation surface, and the base 4 includes two semicircular rings 4.1, and the opening end of two semicircular rings 4.1 is oppositely arranged and the end is formed with symmetrical connecting flange 4.2 along vertical upward extension, and coaxial assembly hole 4.3 is opened in the connecting flange 4.2, and in closed state, two semicircular rings 4.1 are connected into annular structure by fastener 4.4 penetrated in assembly hole 4.3, and the inboard abutting surface is in close contact with the outer wall of bent cap column 1, and the lower end surface is in close contact with the foundation surface to disperse vertical load.

[0022] Vertical adjusting support mechanism 5 includes first connecting rod 5.1 that is vertically fixed to the right below support part 3.1, and the middle part of first connecting rod 5.1 is formed with support convex ring 5.1.1 along the radial direction outward, and the upper end surface of support convex ring 5.1.1 is in abutment with the bottom surface of support part 3.1;First connecting rod 5.1 bottom is screw-connected with adjusting column 5.2, and the bottom surface of adjusting column 5.2 is rotatably connected with the vertical rotating hole in the top surface of base 4 through rotating column 5.3, to realize the conversion of rotating motion of adjusting column 5.2 to vertical displacement of first connecting rod 5.1.

[0023] The anti-rotation structure 6 is used for limiting rotation of the adjusting column 5.2, and comprises a fixed convex ring 6.1 extending radially outward along the bottom of the adjusting column 5.2, and two semicircular arc-shaped sliding grooves, i.e., a first fixed groove 6.2 and a second fixed groove 6.3, are symmetrically arranged at the outer edge of the fixed convex ring 6.1; the circular arc angle of the first fixed groove 6.2 is 180°~270°, the center of the circular arc coincides with the axis of the adjusting column 5.2, and the radius is R1; the circular arc angle of the second fixed groove 6.3 is 180°~270°, the center of the circular arc coincides with the axis of the adjusting column 5.2, and the radius is R2, and R1>R2 is satisfied; two groups of threaded holes 6.4.1 are pre-set on the top surface of the base 4 in the circumferential direction, the positions of each group of threaded holes 6.4.1 correspond to the sliding groove track of the first fixed groove 6.2 or the second fixed groove 6.3; the first fixed groove 6.2 and the second fixed groove 6.3 are distributed in the circumferential direction in a staggered manner, and the coverage areas of the two are complementary, so that at least one sliding groove is aligned with the threaded hole 6.4.1 of the base 4 when the adjusting column 5.2 is rotated to any angle, the locking screw 6.4.2 in the locking assembly 6.4 can be selectively inserted through the sliding groove area of the first fixed groove 6.2 or the second fixed groove 6.3, and is screwed with the threaded hole 6.4.1 of the base 4, and the head of the locking screw 6.4.2 is pressed and rubbed with the contact surface of the fixed convex ring 6.1, thereby limiting the circumferential rotation of the adjusting column 5.2.

[0024] The above only describes the best embodiments of the present application, but cannot be understood as a limitation on the claims. The present application is not limited to the above embodiments, and the specific structure can be changed. Any change made within the protection scope of the independent claims of the present application is within the protection scope of the present application.

Claims

1. A fabricated steel bridge, characterized by, Comprise: The main support beam frame (1) is composed of steel structure truss groups (1.1) arranged equidistantly along the longitudinal direction of the bridge deck; The longitudinal beam unit (2) is composed of a plurality of longitudinal beam (4.1) modules (2.1) fixed equidistantly transversely on the steel structure truss group (1.1), and each longitudinal beam (4.1) module (2.1) is longitudinally connected in series through a box girder unit (2.1.1); Both ends of the box girder unit (2.1.1) are respectively provided with: A boss (2.1.11) at the four corners of the longitudinal first end face, the boss (2.1.11) protrudes outward along the longitudinal direction and is provided with a first connecting hole (2.1.12) vertically penetrating; A notch (2.1.13) at the four corners of the longitudinal second end face, the notch (2.1.13) is recessed inward and both vertical side walls are provided with a second connecting hole (2.1.14) vertically penetrating; Adjacent box girder units (2.1.1) are connected by tightening bolts vertically penetrating the second connecting hole (2.1.14) of the notch (2.1.13) and the first connecting hole (2.1.12) of the boss (2.1.11), and are connected by double-end nuts, realizing longitudinal modular assembly; The transverse bearing beam group (3) is composed of transverse beams (3.1) distributed equidistantly along the longitudinal direction, the transverse beams (3.1) are arranged across and anchored to the upper surfaces of all prefabricated box girder units (2.1.1), forming a transverse rigid connection; The longitudinal distribution beam group (4) is composed of transverse equidistantly distributed longitudinal beams (4.1), the longitudinal beams (4.1) and the transverse beams (3.1) are cross-laid on the upper surface of the transverse beams (3.1), adopting a "H" shaped cross section, including a top upper flange (4.1.1) and a bottom lower flange (4.1.2); The bridge deck top plate (5) is fixed to the upper flange (4.1.1) plane of the longitudinal distribution beam group (4) to form a driving surface.

2. The fabricated steel bridge of claim 1, wherein The steel structure truss group (1.1) comprises a transversely extending cross beam frame (1.1.1), and a plurality of support steel columns (1.1.2) arranged equidistantly along the bottom of the cross beam frame (1.1.1); the bottom end of the support steel column (1.1.2) is anchored to the underwater bed through vertical penetration; the bottom surface of the box girder unit (2.1.1) is rigidly connected with the top surface of the cross beam frame (1.1.1) by welding or high-strength bolt connection.

3. The prefabricated steel bridge according to claim 1, characterized in that, Comprise: The end of the boss (2.1.11) is provided with a tapered surface (2.1.15), the inclination angle of the tapered surface (2.1.15) is 1:10 to 1:5, facilitating automatic alignment during assembly.

4. The prefabricated steel bridge according to claim 1, characterized in that: The bolt locking surface of the second connecting hole (2.1.14) is provided with an elastic lock washer (2.1.16), which is compressed and deformed after the bolt is tightened to offset the loosening caused by vibration.

5. The prefabricated steel bridge according to claim 1, characterized in that: The joint between adjacent box girder units (2.1.1) is filled with epoxy resin sealant to prevent water vapor from entering the connection node.

6. The prefabricated steel bridge according to claim 1, characterized in that: The surface of the top plate is pressed with diamond-shaped anti-slip convex patterns (5.1), and the convex pattern height is 2-3mm.

Images