Concrete pier and steel box girder consolidation device and construction method thereof

Abstract

The invention relates to the field of bridge engineering, in particular to a concrete bridge pier and steel box girder consolidation device and a construction method thereof.The consolidation device comprises a steel pipe, a bottom steel plate, a horizontal stiffening plate and a connecting steel plate, the bottom of the steel pipe is installed in the concrete bridge pier, and the top of the steel pipe is installed in the steel box girder; the bottom steel plate, the horizontal stiffening plate and the connecting steel plate are sequentially arranged at the bottom, the middle and the top of the steel pipe, the bottom steel plate is located in the concrete pier, the horizontal stiffening plate is located on the upper surface of the concrete pier, and the connecting steel plate is located on the lower surface of the steel box girder. Steel box girder manufacturing, consolidation device manufacturing and pier lower portion concrete pouring can be conducted at the same time, and the construction period is shortened; the connecting structure is simple, the on-site welding workload is small, and only the connecting steel plate needs to be welded to the steel box girder bottom plate. According to the invention, the technical problems of high connection construction difficulty and complex working procedures of the existing concrete pier and the steel box girder can be solved, and the concrete pier and the steel box girder can be quickly consolidated.

Description

Technical Field

[0001] The invention relates to the field of bridge engineering, and in particular to a consolidation device for a concrete bridge pier and a steel box beam and a construction method thereof. Background Art

[0002] Steel box girders are widely used in bridge projects due to their high strength, low deadweight, short construction period and other significant features, as well as the guidance of national industrial policies. Due to the requirements of overall structural stress or deformation, the top of some piers needs to be consolidated with the steel box girder. At present, bridge piers are mainly concrete structures, so it is necessary to consider the connection structure between concrete piers and steel box girders.

[0003] At present, there are two main types of connections between concrete piers and steel box girders:

[0004] 1. Steel bar anchoring. That is, the top of the concrete pier extends out to connect the steel bars into the steel box girder with holes reserved in the bottom plate, and then the concrete is poured in the steel box girder to form consolidation. This connection method requires steel bar holes to be reserved at the bottom of the steel box girder, which is difficult to align the steel bar holes, requires high precision during construction, and the quality of concrete pouring in the steel box girder is difficult to guarantee.

[0005] 2. Pier embedding type. A hole is opened in the bottom plate of the steel box girder, and the concrete pier is inserted into the steel box girder. A reinforced partition is set inside the steel box girder to form an anchoring small box chamber. Shear nails are welded at the contact points with the concrete, and the steel box girder is set with shear keys and steel bars inserted inside. This connection method requires high concrete density and complex construction procedures, and cannot give full play to the advantages of the fast overall construction of steel structure bridges.

[0006] Therefore, the existing method for connecting concrete piers and steel box girders has the disadvantages of great construction difficulty and complicated procedures. Summary of the invention

[0007] The purpose of the present invention is to provide a consolidation device for concrete piers and steel box girders and a construction method thereof, which can solve the technical problems of the existing connection construction of concrete piers and steel box girders being difficult and the process being complicated, and can quickly and conveniently complete the consolidation of concrete piers and steel box girders.

[0008] To achieve the above-mentioned purpose, the present invention designs a consolidation device for a concrete pier and a steel box girder, comprising a steel pipe, a bottom steel plate, a horizontal stiffening plate, and a connecting steel plate. The bottom of the steel pipe is installed in the concrete pier, and the top of the steel pipe is installed in the steel box girder; the bottom steel plate, the horizontal stiffening plate, and the connecting steel plate are arranged at the bottom, middle, and top of the steel pipe in sequence, the bottom steel plate is located in the concrete pier, the horizontal stiffening plate is located on the upper surface of the concrete pier, and the connecting steel plate is located on the lower surface of the steel box girder.

[0009] As a preferred solution, the horizontal stiffening plates and the connecting steel plates are both provided with reserved concrete pouring holes for pouring self-compacting micro-expansive concrete.

[0010] As a preferred solution, the bottom steel plate is fixed in the concrete pier by anchor bolts.

[0011] As a preferred solution, the consolidation device further comprises bottom vertical stiffening ribs, which are arranged on the bottom steel plate and located on the side of the steel pipe.

[0012] As a preferred solution, the consolidation device further comprises shear nails, and the shear nails are vertically arranged on the side of the steel pipe along the transverse direction of the steel pipe.

[0013] As a preferred solution, the consolidation device further comprises a top vertical stiffening rib, and the top vertical stiffening rib is arranged at the bottom of the connecting steel plate and located on the side of the steel pipe.

[0014] The present invention also designs a construction method for a consolidation device of a concrete bridge pier and a steel box beam, comprising the following steps:

[0015] The various components of the consolidation device are manufactured in the prefabrication yard and welded to form a whole, and the steel box beam and concrete bridge piers are manufactured simultaneously;

[0016] Transport the consolidation device to the construction site and hoist it above the concrete pier;

[0017] Post-casting concrete on the upper part of the concrete pier;

[0018] After the strength of the post-casting zone concrete reaches the requirement, pour the self-compacting micro-expansion concrete from the concrete pouring hole reserved on the upper part of the connecting steel plate;

[0019] When the strength of the self-compacting micro-expansive concrete reaches the required level, the concrete pouring holes are sealed with steel plates and polished to make them smooth.

[0020] Install the steel box girder onto the consolidation device;

[0021] The connecting steel plate is welded and fixed to the bottom plate of the steel box beam to complete the construction of the consolidation device.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a consolidation device for a concrete bridge pier and a steel box beam and a construction method thereof. The steel box beam manufacturing, the consolidation device manufacturing and the concrete pouring of the lower part of the bridge pier can be carried out simultaneously, which saves construction time; the connection structure is simple, the on-site welding workload is small, and only the connection steel plate and the bottom plate of the steel box beam need to be welded. Therefore, the present invention can solve the technical problems of the existing connection construction difficulty and complicated process of concrete bridge piers and steel box beams, and can quickly and conveniently complete the consolidation of concrete bridge piers and steel box beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a consolidation device for a concrete bridge pier and a steel box girder in the transverse direction of the bridge;

[0025] Figure 2 A schematic diagram of a consolidation device for a concrete pier and a steel box girder along the bridge direction;

[0026] Figure 3 It is a schematic plan view of the steel plate connecting the consolidation device of a concrete pier and a steel box girder.

[0027] Reference numerals:

[0028] Steel box girder 1, concrete pier 2, steel pipe 3, anchor bolt 4, bottom steel plate 5, bottom vertical stiffening rib 6, shear nail 7, horizontal stiffening plate 8, top vertical stiffening rib 9, connecting steel plate 10, concrete pouring hole 11, self-compacting micro-expansive concrete 12, diaphragm 13, longitudinal stiffening rib 14. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In view of the shortcomings of the prior art, the present invention provides a consolidation device for a concrete bridge pier and a steel box beam and a construction method thereof. The production of the steel box beam, the production of the consolidation device and the pouring of concrete at the bottom of the bridge pier can be carried out simultaneously, saving construction time; the connection structure is simple, the on-site welding workload is small, and only the connection steel plate and the bottom plate of the steel box beam need to be welded. Therefore, the present invention can solve the technical problems of the existing connection construction difficulty and complex procedures of the concrete bridge pier and the steel box beam, and can quickly and conveniently complete the consolidation of the concrete bridge pier and the steel box beam.

[0033] The invention relates to a consolidation device for a concrete bridge pier and a steel box beam, comprising a steel pipe, a bottom steel plate, a horizontal stiffening plate, a connecting steel plate, a bottom vertical stiffening rib, a shear nail, and a top vertical stiffening rib.

[0034] The bottom of the steel pipe is installed in the concrete pier, and the top of the steel pipe is installed in the steel box girder; the bottom steel plate, the horizontal stiffening plate and the connecting steel plate are arranged at the bottom, middle and top of the steel pipe in sequence, the bottom steel plate is located in the concrete pier, the horizontal stiffening plate is located on the upper surface of the concrete pier, and the connecting steel plate is located on the lower surface of the steel box girder.

[0035] The horizontal stiffening plate and the connecting steel plate are both provided with concrete pouring holes for pouring self-compacting micro-expansion concrete. The bottom steel plate is fixed in the concrete bridge pier by anchor bolts.

[0036] The bottom vertical stiffening ribs are arranged on the bottom steel plate and located on the side of the steel pipe.

[0037] The shear studs are vertically arranged on the side of the steel pipe along the transverse direction of the steel pipe.

[0038] The top vertical stiffening rib is arranged at the bottom of the connecting steel plate and located on the side of the steel pipe.

[0039] The present invention also relates to a construction method of a consolidation device for a concrete bridge pier and a steel box beam, comprising the following steps:

[0040] The various components of the consolidation device are manufactured in the prefabrication yard and welded to form a whole, and the steel box beam and concrete bridge piers are manufactured simultaneously;

[0041] Transport the consolidation device to the construction site and hoist it above the concrete pier;

[0042] Post-casting concrete on the upper part of the concrete pier;

[0043] After the strength of the post-casting zone concrete reaches the requirement, pour the self-compacting micro-expansion concrete from the concrete pouring hole reserved on the upper part of the connecting steel plate;

[0044] When the strength of the self-compacting micro-expansive concrete reaches the required level, the concrete pouring holes are sealed with steel plates and polished to make them smooth.

[0045] Install the steel box girder onto the consolidation device;

[0046] The connecting steel plate is welded and fixed to the bottom plate of the steel box beam to complete the construction of the consolidation device.

[0047] The following is a description with reference to the accompanying drawings and examples. It should be noted that the accompanying drawings of the present invention are only for illustrative purposes and are only schematic diagrams, not physical drawings, and should not be construed as limiting the present invention. The shape of the steel pipe in the figure can be circular, rectangular or other shapes, and the number is not limited to 2, and should be set according to engineering needs.

[0048] like Figure 1 , 2 As shown, the present invention provides a consolidation device for a concrete pier and a steel box beam, wherein the top of the consolidation device is installed in a steel box beam 1, and the bottom of the consolidation device is pre-buried in a concrete pier 2. The consolidation device is composed of a steel pipe 3, an anchor bolt 4, a bottom steel plate 5, a bottom vertical stiffening rib 6, a shear nail 7, a horizontal stiffening plate 8, a top vertical stiffening rib 9, a connecting steel plate 10, and a self-compacting micro-expansion concrete 12. The steel pipe 3 of the consolidation device is filled with concrete, and a shear nail 7 is arranged on the outside of the steel pipe 3.

[0049] in, Figure 1 is a schematic diagram of the consolidation device in the transverse direction of the bridge, that is, a schematic diagram along the cross section of the bridge. Figure 2 This is a schematic diagram of the consolidation device along the bridge direction, that is, a schematic diagram along the length of the bridge.

[0050] like Figure 3 As shown, it is a schematic plan view of the connecting steel plates in the consolidation device. Concrete pouring holes 11 are reserved on the horizontal stiffening plates 8 and the connecting steel plates 10 of the consolidation device for pouring self-compacting micro-expansive concrete 12.

[0051] A transverse partition 13 and longitudinal stiffening ribs 14 are arranged inside the connecting part of the steel box girder 1 to increase the strength of the steel box girder 1 so as to bear the weight of the consolidation device.

[0052] The present invention also provides a construction method of a consolidation device for a concrete bridge pier and a steel box beam. The main construction steps of the consolidation device of the present invention are as follows:

[0053] 1) The various components of the consolidation device are manufactured in the prefabrication yard. The steel pipe 3, anchor bolt 4, bottom steel plate 5, bottom vertical stiffening rib 6, shear nail 7, horizontal stiffening plate 8, top vertical stiffening rib 9, and connecting steel plate 10 are processed according to the design size and large-scale drawing, and the above components are welded to form a whole; the steel box girder 1 and concrete bridge pier 2 are manufactured simultaneously.

[0054] 2) The steps of making the concrete pier are: tying the concrete pier 2 with steel bars, installing the formwork, and pouring the concrete at the bottom of the pier. During the construction process, a positioning steel member is set in the upper post-casting zone of the concrete pier 2 for positioning, and a position for the installation of the consolidation device is reserved;

[0055] 3) The consolidation device is transported to the construction site, hoisted to the top of the concrete pier 2, and positioned using positioning steel components.

[0056] 4) Post-cast concrete on the upper part of concrete pier 2.

[0057] 5) After the strength of the post-cast zone concrete reaches 90%, pour the self-compacting micro-expansive concrete 12 from the concrete pouring hole 11 reserved on the upper part of the connecting steel plate 10.

[0058] 6) After the strength of the self-compacting micro-expansive concrete 12 reaches 90%, the concrete pouring holes 11 reserved on the upper part of the connecting steel plate 10 are sealed with steel plates for welding and polished to make them smooth.

[0059] 7) Install the steel box girder 1 onto the consolidation device.

[0060] 8) The connecting steel plate 10 in the consolidation device is welded and fixed to the bottom plate of the steel box girder 1 to complete the construction of the consolidation device.

[0061] The material properties used in the above steps are as follows: the consolidation device steel components and steel box girders are made of Q345q steel, the pier concrete is made of C40 concrete, and the self-compacting micro-expansive concrete in the steel tube is made of C40.

[0062] It should be understood that the specific order or hierarchy of steps in the process disclosed by the present invention is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims provide the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A consolidation device for a concrete bridge pier and a steel box beam, characterized in that: It includes a steel pipe, a bottom steel plate, a horizontal stiffening plate, and a connecting steel plate. The bottom of the steel pipe is installed in a concrete pier, and the top of the steel pipe is installed in a steel box girder. The bottom steel plate, the horizontal stiffening plate, and the connecting steel plate are arranged at the bottom, middle, and top of the steel pipe in sequence. The bottom steel plate is located in the concrete pier, the horizontal stiffening plate is located on the upper surface of the concrete pier, and the connecting steel plate is located on the lower surface of the steel box girder.

2. The consolidation device for a concrete bridge pier and a steel box beam according to claim 1, characterized in that: Concrete pouring holes are reserved on the horizontal stiffening plates and the connecting steel plates for pouring self-compacting micro-expansive concrete.

3. The consolidation device for a concrete bridge pier and a steel box beam according to claim 2, characterized in that: The bottom steel plate is fixed in the concrete pier by anchor bolts.

4. The consolidation device for a concrete bridge pier and a steel box beam according to claim 1, characterized in that: The consolidation device also includes bottom vertical stiffening ribs, which are arranged on the bottom steel plate and located on the side of the steel pipe.

5. The consolidation device for a concrete bridge pier and a steel box beam according to claim 1, characterized in that: The consolidation device also includes shear nails, which are vertically arranged on the side of the steel pipe along the transverse direction of the steel pipe.

6. The consolidation device for a concrete bridge pier and a steel box beam according to claim 1, characterized in that: The consolidation device also includes a top vertical stiffening rib, which is arranged at the bottom of the connecting steel plate and located on the side of the steel pipe.

7. A construction method for a consolidation device for a concrete bridge pier and a steel box beam, characterized in that: The following steps are included: The various components of the consolidation device are manufactured in the prefabrication yard and welded to form a whole, and the steel box beam and concrete bridge piers are manufactured simultaneously; Transport the consolidation device to the construction site and hoist it above the concrete pier; Post-casting concrete on the upper part of the concrete pier; After the strength of the post-casting zone concrete reaches the requirement, pour the self-compacting micro-expansion concrete from the concrete pouring hole reserved on the upper part of the connecting steel plate; When the strength of the self-compacting micro-expansive concrete reaches the required level, the concrete pouring holes are sealed with steel plates and polished to make them smooth. Install the steel box girder onto the consolidation device; The connecting steel plate is welded and fixed to the bottom plate of the steel box beam to complete the construction of the consolidation device.

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