Umbrella-shaped rigid frame bridge with reinforced concrete structure

Abstract

The utility model discloses an umbrella-shaped rigid frame bridge with a steel-concrete structure, which comprises a bridge main pier, a beam body formed by continuously splicing a plurality of box beam units is erected at the upper end of the bridge main pier, a plurality of inclined supports for supporting and fixing the beam body are arranged on the side wall of the bridge main pier, and the inclined supports are symmetrically distributed on the bridge main pier in pairs. The upper end and the lower end of the inclined support are fixedly connected with a bridge main pier and a bridge body through connecting flanges respectively. The utility model has the advantages that the stress is more reasonable, the problem of downward deflection of the end of the beam body is effectively avoided, the durability of the structure is improved, and the transportation, hoisting and erection are convenient; meanwhile, the problems that the construction difficulty of the No.0 beam section, located over the bridge main pier, of the beam body is large, and the construction quality is not easy to control are solved, the using amount of concrete is reduced, and the method has the advantages of being light in self weight, easy to construct, good in durability, efficient in structure and the like and is suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to an umbrella-shaped rigid frame bridge with a steel-concrete structure. Background Technique

[0002] With the advent of the era of industrialized construction, the field of transportation construction is facing unprecedented changes. As a traditional civil engineering structure, bridges are developing towards prefabrication and industrialization in this transformation; at the same time, as key projects of traffic lifelines, bridges are also making great strides towards industrial production and green construction in this era of change.

[0003] In the development of modern bridges, rigid frame bridges have been widely promoted and rapidly developed due to their strong spanning ability, stable structure, and adaptability to various construction environments. In the past, the T-shaped rigid frame was a bridge type commonly used in the construction of long-span bridges. Since this bridge type is a statically determinate or low-degree statically indeterminate structure, problems such as concrete cracking, uneven driving, and end deflection are likely to occur during use. Therefore, the T-shaped rigid frame bridge is less and less used in current bridge construction; while the long-span continuous rigid frame bridge combines the structural characteristics of the T-shaped rigid frame and the continuous beam bridge, so it has been gradually developed and widely applied.

[0004] The 0# block of the long-span continuous rigid frame bridge is the core stress-bearing part, and its size increases continuously with the increase of the span of the continuous rigid frame bridge; during the pouring process of the existing 0# block of the long-span continuous rigid frame bridge, a large amount of hydration heat is often released, which may cause temperature cracks inside the 0# block, making the construction of the 0# block a key link in the construction of the continuous rigid frame bridge. At the same time, due to the complex spatial shape of the 0# block, dense steel bars and prestressed pipes, and obvious shear lag effect, the whole construction process is in a high-stress state. At this time, once there are situations such as high piers and complex construction environments, it will be difficult to ensure the construction quality of the 0# block in the existing long-span continuous rigid frame bridge, thereby affecting the safety and durability of the entire bridge structure. Summary of the Invention

[0005] The purpose of the utility model is to provide an umbrella-shaped rigid frame bridge with a steel-concrete structure in view of the defects of the prior art.

[0006] To achieve the above purpose, the utility model can adopt the following technical solutions:

[0007] The umbrella-shaped rigid frame bridge with a steel-concrete structure of the utility model includes a main bridge pier. A beam body composed of multiple box girder units continuously spliced is erected at the upper end of the main bridge pier. A plurality of inclined supports for fixing the beam body are arranged on the side wall of the main bridge pier. The inclined supports are grouped in pairs and symmetrically arranged on the main bridge pier. The upper and lower ends of the inclined supports are fixedly connected to the main bridge pier and the beam body respectively through connecting flanges.

[0008] Specifically, the main bridge pier is composed of multiple continuously spliced pier units. Each pier unit includes a vertically arranged rectangular steel pipe, and the rectangular steel pipe is filled with pier filler; the inclined support is composed of multiple continuously spliced support units. Each support unit includes an inner core pipe and an outer sleeve coaxially sleeved, and a plurality of connecting wing plates are evenly distributed circumferentially between the inner core pipe and the outer sleeve, and the chambers between adjacent two connecting wing plates are filled with inclined support filler.

[0009] Further, for the convenience of splicing the inclined support, an inclined guide pipe for passing through the inner core pipe can also be arranged in each inclined support.

[0010] Further, for the convenience of splicing the beam body, a pair of horizontal guide pipes spanning between the two abutments can also be arranged on the left and right sides in the width direction of the beam body, and hanging ears for hanging on the horizontal guide pipes are arranged on the left and right webs of each box girder unit.

[0011] Further, for strengthening the inclined support, a reinforcing connecting plate can also be arranged at the included angle between the main bridge pier and each inclined support.

[0012] The advantages of the present utility model are that a beam body composed of multiple continuously spliced box girder units erected on the main bridge pier, and a plurality of inclined supports arranged symmetrically in pairs on the main bridge pier for supporting and fixing the beam body together form a rigid frame bridge with an umbrella-shaped structure, the force is more reasonable, effectively avoiding the problem of downward deflection at the end of the beam body, improving the durability of the structure, and being convenient for transportation, hoisting and erection; at the same time, it also avoids the problems of large construction difficulty and difficult control of construction quality of the 0# beam section where the beam body is directly above the main bridge pier, reduces the amount of concrete used, has the advantages of light self-weight, easy construction, good durability, high structural efficiency, etc., and is suitable for popularization and application. Brief Description of the Drawings

[0013] Figure 1 is the structural schematic diagram of the present utility model.

[0014] Figure 2 is Figure 1 the enlarged sectional view of each pier unit constituting the main bridge pier in

[0015] Figure 3 is Figure 1 the enlarged sectional view of each support unit constituting the inclined support in

[0016] Figure 4 is Figure 1 the enlarged sectional view of each box girder unit constituting the beam body in Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0019] As Figure 1 shown, the steel-concrete structure umbrella-shaped rigid frame bridge of the present utility model includes a vertically arranged bridge main pier. A beam body is horizontally erected at the upper end of the bridge main pier. A plurality of inclined supports for fixing the beam body are arranged on the side wall of the bridge main pier. The inclined supports are grouped in pairs and symmetrically arranged on the bridge main pier. The upper and lower ends of the inclined supports are respectively fixedly connected to the bridge main pier and the beam body, thus forming a rigid frame bridge approximately in the shape of an umbrella structure.

[0020] Specifically, the bridge main pier is composed of multiple continuously spliced main pier units 1. As Figure 2 shown, each main pier unit includes a vertically arranged rectangular steel pipe 1.1. The main pier filler 1.2 is filled in the rectangular steel pipe 1.1. The main pier filler 1.2 is concrete and is poured into the rectangular steel pipe 1.1, so that the rectangular steel pipe 1.1 and the main pier filler 1.2 jointly form the steel-concrete structure main pier unit 1, which is convenient for forming the steel-concrete structure bridge main pier through the construction method of splicing section by section and integral pouring.

[0021] The beam body is continuously spliced by multiple box girder units 2. In order to facilitate the splicing of each box girder unit 2 to form the beam body, a pair of horizontal guiding pipes 3 should also be arranged on the left and right sides in the width direction of the beam body. The horizontal guiding pipes 3 are horizontally erected on the abutments 4 at both ends of the beam body, and the distance between the two horizontal guiding pipes 3 should match the width of each box girder unit 2 that constitutes the beam body. At this time, hanging ears 5 that can be hooked on the horizontal guiding pipes 3 are arranged on the left and right webs of each box girder unit 2 (as Figure 4 shown), so that the box girder unit 2 can be hooked between the two horizontal guiding pipes 3, and a boosting device is used to horizontally push the box girder unit 2, so that the box girder unit 2 moves horizontally towards the bridge main pier and is welded and fixedly connected one by one, thus forming the entire beam body.

[0022] The inclined support is composed of multiple continuously spliced support units 6. As Figure 3As shown, each support unit 6 includes an inner core tube 6.1 and an outer sleeve tube 6.2 that are coaxially sleeved, and a plurality of connecting wing plates 6.3 are evenly distributed circumferentially between the inner core tube 6.1 and the outer sleeve tube 6.2. The inner core tube 6.1 and the outer sleeve tube 6.2 are fixedly connected into one body through the connecting wing plates 6.3. A cavity formed between two adjacent connecting wing plates 6.3 is also filled with inclined support filler 6.4. The inclined support filler 6.4 is concrete, which is poured into the cavities between all adjacent connecting wing plates 6.3 on each support unit 6, so that the inner core tube 6.1, the outer sleeve tube 6.2, the connecting wing plates 6.3 and the inclined support filler 6.4 jointly constitute the support unit 6 of the steel-concrete structure, facilitating the formation of the inclined support of the steel-concrete structure through the construction method of splicing each section one by one and pouring integrally.

[0023] In addition, a connecting flange 7 should be provided at the end of the inclined support, and through the connecting flange 7, the upper and lower ends of the inclined support are respectively fixedly connected to the main pier of the bridge and the beam body.

[0024] Furthermore, in order to facilitate the splicing of each support unit 6 to form an inclined support, an inclined guide tube 8 for passing through the inner core tube 3.1 should be provided in each inclined support 6; the inclined guide tube 8 is a cylindrical steel pipe, and its inclined direction is consistent with the inclined direction of the inclined support; the diameter of the inclined guide tube 8 should be consistent with the inner diameter of the inner core tube 3.1, so that each support unit 6 can be stably sleeved on the inclined guide tube 8 and slide downward along the inclined guide tube 8, thereby splicing and fixedly connecting into an inclined support.

[0025] Furthermore, in order to strengthen the fixation of the inclined support, a reinforcement connecting plate 9 can also be provided at the included angle between the installed and arranged main pier of the bridge and each inclined support. The reinforcement connecting plate 9 is welded at the included angle between the main pier of the bridge and the inclined support to form a further pulling and fixing of the inclined support.

[0026] The construction steps of the entire steel-concrete structure umbrella-shaped rigid frame bridge are as follows:

[0027] The first step is to erect the main pier of the bridge. Segmentally vertically hoist the rectangular steel pipe 1.1 through on-site lofting, and weld each section of the rectangular steel pipe 1.1 one by one. Then, pour the main pier filler 1.2 integrally from top to bottom to form the main pier of the bridge.

[0028] The second step is to set up boosting equipment on the two abutments 4 where the beam body needs to be erected, and erect a pair of horizontal guide tubes 3 according to the preset width of the beam body.

[0029] Step 3: Erect the beam body. First, erect a box girder unit 2 on the main pier of the bridge as the first symmetrically centered girder (i.e., the 0# beam segment), and then symmetrically erect the remaining beam segments. The erection method is to hang the box girder unit 2 on two horizontal guiding pipes 3 through the lugs 5 on the left and right webs of the box girder unit 2, and then use a boosting device to horizontally push the box girder unit 2 towards the main pier of the bridge. After the box girder unit 2 is moved into place, weld the adjacent box girder units 2 to form the beam body;

[0030] Step 4: Install the connecting flanges 7 on the corresponding main piers and beam bodies of the bridge according to the preset positions of the inclined supports, and erect the inclined guiding pipes 8 between the corresponding connecting flanges 7. Note that the inclined upper ends of the inclined guiding pipes 8 are not fixedly connected to the connecting flanges 7 first;

[0031] Step 5: Install the inclined supports. Sleeve the inner core pipe 6.1 and the outer sleeve pipe 6.2, which are integrally connected by the connecting wing plate 6.3, onto the inclined guiding pipes 8 section by section, and weld and fixedly connect the adjacent sections together. Then, pour the inclined support filler 6.4 integrally from top to bottom to form the inclined support;

[0032] Step 6: Construct the connecting flanges 7 at each connection part;

[0033] Step 7: Construct the bridge deck, the bridge deck paving, and the accessory structures to complete the construction of the entire umbrella-shaped rigid frame bridge.

[0034] The entire umbrella-shaped rigid frame bridge has a more reasonable force, effectively avoids the problem of downward deflection at the end of the beam body, improves the durability of the structure, and is convenient for transportation, hoisting, and erection; at the same time, it also avoids the problems of difficult construction and hard-to-control construction quality of the 0# beam segment where the beam body is directly above the main pier of the bridge, reduces the amount of concrete used, and has the advantages of light self-weight, easy construction, good durability, and high structural efficiency, making it suitable for popularization and application.

Claims

1. An umbrella-shaped rigid frame bridge of steel-concrete structure, characterized in that: It includes a main bridge pier, at the upper end of which a beam body formed by continuously splicing a plurality of box beam units is erected, and on the side walls of the main bridge pier are arranged a plurality of inclined supports for supporting the beam body, the inclined supports are arranged in groups of two and symmetrically on the main bridge pier, and the upper and lower ends of the inclined supports are respectively fixedly connected to the main bridge pier and the beam body through connecting flanges.

2. The umbrella-shaped rigid frame bridge of steel-concrete structure according to claim 1 is characterized in that: The main pier of the bridge is composed of a plurality of main pier units that are continuously spliced, and each of the main pier units includes a vertically arranged rectangular steel pipe filled with main pier fillers.

3. The umbrella-shaped rigid frame bridge of steel-concrete structure according to claim 1 is characterized in that: The inclined support is composed of multiple sections of support units that are continuously spliced, and each section of the support unit includes an inner core tube and an outer sleeve that are coaxially mounted. A plurality of connecting wing plates are evenly distributed along the circumference between the inner core tube and the outer sleeve, and the cavity between two adjacent connecting wing plates is filled with an inclined support filler.

4. The umbrella-shaped rigid frame bridge of steel-concrete structure according to claim 3 is characterized in that: An oblique guide tube for passing the inner core tube is arranged in each of the oblique supports.

5. The umbrella-shaped rigid frame bridge of steel-concrete structure according to claim 1 is characterized in that: A pair of horizontal guide tubes are arranged on the left and right sides of the beam body in the width direction and are horizontally mounted between the two abutments. The left and right webs of each box beam unit are provided with hanging ears that are hooked on the horizontal guide tubes.

6. The umbrella-shaped rigid frame bridge of steel-concrete structure according to claim 1 is characterized in that: A reinforcement connecting plate is provided at the angle between the main pier of the bridge and each of the oblique supports.

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