Bridge pier structure for extra-large bridge

Abstract

The utility model relates to a bridge pier structure for an extra-large bridge, and relates to the technical field of bridge construction.The bridge pier structure comprises a bridge pier body arranged on the ground, two sets of sinking grooves are formed in the bridge pier body, a supporting frame is pre-buried in the bridge pier body, the supporting frame is arranged on the sinking grooves, and the supporting frame is fixedly connected with a keel frame for supporting padstones; the bottom of the supporting padstone is arranged in the sinking groove and connected with the pier body. The sinking groove is formed in the upper surface of the top cap, and then the keel frame of the bearing padstone is fixed through the supporting frame in the sinking groove, so that the supporting and fixing effect of the top cap on the bearing padstone is improved, and then the bearing padstone can transmit acting force of a bridge to the pier body conveniently; and the connection strength between the bearing padstone and the pier is improved.

Description

Technical Field

[0001] This application relates to the technical field of bridge construction, and in particular to a pier structure for extra-large bridges. Background Technology

[0002] Bridge piers are substructures that support the bridge span structure and transfer dead loads and vehicle live loads to the foundation. They are usually located between two abutments and their main function is to support the bridge span structure.

[0003] Currently, for bridge construction on highways, local roads, and urban roads, the piers are still constructed using traditional on-site casting techniques. The pier structure includes the pier itself and multiple sets of supporting pads placed on the pier. After the pier is cast, multiple sets of supporting pads are cast on the pier, and finally the abutment is placed on the supporting pads to support the abutment.

[0004] However, because the supporting pad stone of the super-large bridge exerts a large force, when the supporting pad stone transfers the force of the abutment to the pier, the connection between the pier and the supporting pad stone is easily damaged due to the large force, which in turn reduces the connection strength between the pier and the supporting pad stone. Utility Model Content

[0005] To improve the connection strength between the supporting pad stone and the pier, this application provides a pier structure for extra-large bridges.

[0006] This application provides a bridge pier structure for extra-large bridges, which adopts the following technical solution:

[0007] A bridge pier structure for a super-large bridge includes a pier body set on the ground, two sets of sinking grooves opened on the pier body, a support frame pre-embedded on the pier body, the support frame set on the sinking groove, the support frame fixedly connected to the keel frame of the support pad stone, and the bottom of the support pad stone set in the sinking groove and connected to the pier body.

[0008] By adopting the above technical solution, a groove is opened on the upper surface of the top cap, and the keel frame of the supporting pad stone is fixed by the support frame in the groove. This improves the supporting and fixing effect of the top cap on the supporting pad stone, and makes it easier for the supporting pad stone to transfer the force of the bridge to the pier body, thereby improving the connection strength between the supporting pad stone and the pier.

[0009] Furthermore, the keel frame of the supporting pad stone is located between the support frame and the bottom of the sinkhole, and the keel frame and the support frame are tied and fixed together with steel bars.

[0010] By adopting the above technical solution, the keel frame of the supporting pad stone is located between the support frame and the bottom of the sinkhole, thereby improving the fixing effect of the pier body on the supporting pad stone.

[0011] Furthermore, a protective layer is provided on the supporting pad stone, and multiple sets of pad blocks are provided inside the protective layer. The multiple sets of pad blocks are arranged on the outer perimeter of the keel frame, and the pad blocks are precast using concrete of the same concrete grade as the supporting pad stone.

[0012] By adopting the above technical solution, multiple sets of pad blocks are pressed against the template, so that the pad blocks and concrete together form a protective layer to protect the supporting stone keel frame and support frame. The protective layer ensures that the stone concrete has a certain protective layer thickness to prevent steel corrosion and ensure the structural safety of the stone.

[0013] Furthermore, the centerline of the pier body and the centerline of the bridge joint are parallel to each other and do not coincide.

[0014] By adopting the above technical solution, the asymmetrical structural design of the pier body centerline and the bridge joint centerline creates an eccentric distance in the longitudinal direction, which helps to disperse the force on the pier body and avoid the concentration of a single force point, thereby improving the structural stability and safety of the pier body.

[0015] Furthermore, the strength of the supporting pad stone is greater than the strength of the pier body.

[0016] By adopting the above technical solution, the strength of the support pad stone is greater than that of the pier body, which enables the support pad stone to withstand greater pressure and load, effectively dispersing the force transmitted from the bridge bearing and avoiding excessive pressure on the pier due to excessive force concentration.

[0017] Furthermore, the pier body includes:

[0018] The pier body is mounted on a ground mounting platform;

[0019] The top cap is set on the end of the pier body away from the ground, and the sinkhole is opened at the end of the top cap away from the ground.

[0020] By adopting the above technical solution, the force exerted by the bridge on the supporting pad stone is transferred to the top cap and then transmitted to the installation platform through the pier body, thereby achieving the support and fixation of the bridge.

[0021] Furthermore, the width of the top cap at the end furthest from the ground is greater than the width at the end closest to the ground, and the cross-section of the pier body is an elliptical structure.

[0022] By adopting the above technical solution, the elliptical pier body facilitates the support and fixation of the bottom of the top cap, and the top cap, which is wider at the top and narrower at the bottom, prevents the pier body from becoming too large, thereby solving the problem of excessive material consumption due to the excessive size of the supporting pad stone.

[0023] Furthermore, the top cap is provided with a drip groove to prevent water accumulated at the top of the top cap from flowing into the pier body.

[0024] By adopting the above technical solution, the water flowing down from the top of the cap can be dripped off in a timely manner through the drip groove, thereby reducing the probability of water flowing down the top of the cap into the pier body.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] By creating a groove on the upper surface of the top cap and then fixing the keel frame of the supporting pad stone with the support frame in the groove, the supporting and fixing effect of the top cap on the supporting pad stone is improved. At the same time, by making the strength of the supporting pad stone greater than the strength of the pier body, it is easier for the supporting pad stone to transfer the force of the bridge to the pier body, thereby improving the connection strength between the supporting pad stone and the pier. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the bridge pier structure in this application;

[0028] Figure 2 This is a schematic diagram of the pier body and support frame structure of this application, in which a corner of the top cap is cut off;

[0029] Figure 3 yes Figure 2 Enlarged diagram of section A in the middle;

[0030] Figure 4 This is a top view of the pier structure of this application, in which the center lines of the pier body and the two sets of supporting pad stones in the length and width directions are marked.

[0031] Attached reference numerals: 1. Pier body; 11. Pier body; 12. Top cap; 121. Settlement channel; 122. Drip channel; 123. Support frame; 2. Support pad stone. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a bridge pier structure for extra-large bridges.

[0034] Reference Figure 1 and Figure 2 A bridge pier structure for a super-large bridge includes a pier body 1 set on the ground, two sets of sinkholes 121 are opened on the pier body 1, a support frame 123 is pre-embedded on the pier body 1, the support frame 123 is set on the sinkholes 121, the support frame 123 is fixedly connected to the keel frame of the support pad stone 2, and the bottom of the support pad stone 2 is set in the sinkholes 121 and connected to the pier body 1.

[0035] Reference Figure 1 and Figure 2The pier body 1 includes a pier body 11 and a top cap 12. A concrete platform is set on the ground at the bottom of the pier body 1. The pier body 11 is fixedly installed on the surface of the platform. The cross-section of the pier body 11 is elliptical. The top cap 12 is fixedly installed on the end of the pier body 11 away from the platform. The width of the end of the top cap 12 away from the ground is greater than the width of the end closer to the ground. The side of the top cap 12 away from the pier body 11 is rectangular. The top cap 12, which is wider at the top and narrower at the bottom, prevents the pier body 11 from becoming too large, thereby solving the problem of excessive material usage due to the excessive size of the supporting pad stone 2.

[0036] Reference Figure 2 and Figure 3 Since the top cap 12 has a structure that is wider at the top and narrower at the bottom, in order to prevent the water accumulated at the top of the top cap 12 from flowing into the pier body 11 along the side wall of the top cap 12, a step is provided at one end of the bottom of the top cap 12, and a drip groove 122 is provided on one side of the bottom of the step. The drip groove 122 drips the water accumulated at the top of the top cap 12 in time, thereby reducing the probability of the water accumulated at the top of the top cap 12 flowing into the pier body 11.

[0037] Reference Figure 1 and Figure 2 Two sets of sinkholes 121 are provided on the end of the top cap 12 away from the pier body 11. A support frame 123 is pre-embedded and installed on the top cap 12. The support frame 123 is located on the sinkhole 121. Then, with the support of the support frame 123, the keel frame of the support pad stone 2 is tied between the support frame 123 and the bottom of the sinkhole 121. After the keel frame of the support pad stone 2 is tied, multiple sets of pad blocks are installed on the outside of the keel frame by steel bars. The pad blocks are precast using concrete of the same grade as the support pad stone 2. The bottom and side walls of the sinkhole 121 are roughened. Then the template of the support pad stone 2 is installed. The side walls of the pad blocks are pressed against the template. Finally, concrete is poured to form the pouring construction of the support pad stone 2. In this embodiment, the support frame 123 is formed by multiple sets of steel bars pre-embedded and tied together on the top cap 12.

[0038] Reference Figure 1 and Figure 2 Multiple sets of spacers are pressed against the formwork, so that the spacers and concrete together form a protective layer that protects the keel frame and support frame 123 of the supporting pad stone 2. The protective layer ensures that the concrete of the supporting pad stone 2 has a certain protective layer thickness to prevent steel corrosion and ensure the structural safety of the pad stone. In addition, the wire ends of the spacers and steel bars should not extend into the protective layer to avoid forming corrosion channels. Such measures help to improve the service life and structural stability of the supporting pad stone 2.

[0039] Reference Figure 1Since the bearing pad 2 is used to transfer the force from the abutment to the pier body 1, by making the strength of the bearing pad 2 greater than the strength of the pier body 1, the bearing pad 2 can withstand greater pressure and load, effectively dispersing the force transmitted from the bridge bearing and avoiding excessive pressure on the pier due to excessive force concentration. In this embodiment, the pier body 1 is cast with C35 concrete, and the bearing pad 2 is cast with C40 concrete.

[0040] Reference Figure 1 and Figure 4 The centerline of the pier body 1 is parallel to and does not coincide with the centerline of the bridge joint. The position of the bridge joint corresponds to the position between the two sets of supporting pad stones 2. Because the centerline of the pier body 1 is parallel to and does not coincide with the centerline of the bridge joint, the distances from the sidewalls of the two sets of supporting pad stones 2 at the same position to the centerline of the pier body 1 are not equal. In the top view of this embodiment, the centerlines of the pier body 1 and the two sets of supporting pad stones 2 do not coincide in the length and width directions. This makes the force on the pier body 1 asymmetrical. Through this asymmetrical structural design, an eccentric distance is generated in the longitudinal direction, which helps to disperse the force on the pier body 1 and avoid the concentration of a single force point, thereby improving the structural stability and safety of the pier body 1. In addition, this design can also effectively reduce the deformation or damage that may occur in the pier body 1 during use, ensuring that the pier body 1 can maintain a good condition for a longer period of time and provide safety for traffic.

[0041] The working principle of this application embodiment is as follows:

[0042] By creating a groove 121 on the upper surface of the top cap 12, and then fixing the keel frame of the supporting pad stone 2 through the support frame 123 in the groove 121, the supporting and fixing effect of the top cap 12 on the supporting pad stone 2 is improved. At the same time, by making the strength of the supporting pad stone 2 greater than the strength of the pier body 1, it is easier for the supporting pad stone 2 to transfer the force of the bridge to the pier body 1, thereby improving the connection strength between the supporting pad stone 2 and the pier.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge pier structure for extra-large bridges, characterized in that: The bridge includes a pier body (1) set on the ground, with two sets of sinking grooves (121) on the pier body (1), and a support frame (123) pre-embedded on the pier body (1). The support frame (123) is set on the sinking groove (121), and the support frame (123) is fixedly connected to the keel frame of the support pad stone (2). The bottom of the support pad stone (2) is set in the sinking groove (121) and connected to the pier body (1).

2. The bridge pier structure for a super-large bridge according to claim 1, characterized in that: The keel frame of the supporting pad stone (2) is located between the support frame (123) and the bottom of the sinkhole (121), and the keel frame and the support frame (123) are tied and fixed by steel bars.

3. A bridge pier structure for extra-large bridges according to claim 2, characterized in that: A protective layer is provided on the supporting pad stone (2), and multiple sets of pad blocks are provided inside the protective layer. The multiple sets of pad blocks are set on the outer perimeter of the keel frame. The pad blocks are precast using concrete of the same concrete grade as the supporting pad stone (2).

4. A bridge pier structure for extra-large bridges according to claim 3, characterized in that: The centerline of the pier body (1) is parallel to and does not coincide with the centerline of the bridge joint.

5. A bridge pier structure for extra-large bridges according to claim 2, characterized in that: The strength of the supporting pad stone (2) is greater than the strength of the pier body (1).

6. A bridge pier structure for extra-large bridges according to claim 1, characterized in that: The pier body (1) includes: Pier body (11), the pier body (11) is set on the ground mounting platform; The top cap (12) is located on the end of the pier body (11) away from the ground, and the sinkhole (121) is located on the end of the top cap (12) away from the ground.

7. A bridge pier structure for extra-large bridges according to claim 6, characterized in that: The width of the top cap (12) at the end away from the ground is greater than the width at the end near the ground, and the cross-section of the pier body (11) is an elliptical structure.

8. A bridge pier structure for a super-large bridge according to claim 7, characterized in that: The top cap (12) is provided with a drip groove (122) to prevent water accumulated at the top of the top cap (12) from flowing into the pier body (11).

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