Arch bridge pier

Abstract

The utility model discloses an arch bridge pier, belongs to the field of bridge engineering, and solves the problems that a traditional frame pier is cumbersome in appearance, poor in spanning capacity in the transverse bridge direction and tedious in construction. The bridge pier comprises a pier body, a bearing platform and a pile foundation which are sequentially arranged from top to bottom, the pier body comprises a middle arch rib, side arch ribs and a pier top cap beam, the side arch ribs are located on the two sides of the middle arch rib and are semi-arched cantilever beams, the pier top cap beam is located on the top of the middle arch rib and the top of the side arch ribs, and a bridge pier skewback is arranged on the top of the bearing platform. An arch foot on one side of the middle arch rib and an arch foot of the side arch rib on the same side are jointly connected to a bridge pier skewback. The advantages that an arch structure is large in spanning capacity and high in material utilization rate are fully utilized, building materials are saved, the structure size is light, and the defect that surface cracks are caused by too large concrete hydration heat of a traditional frame pier is overcome. The overpass structure has large spanning capacity, ensures that the space under the overpass is transparent, and saves urban land resources.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge engineering field, and concretely relates to an arch bridge pier. BACKGROUND

[0002] In recent years, with the development of China's economy and society, the construction of urban roads is promoted, and bridges account for a high proportion in the construction of urban roads, especially with the development of urbanization, urban land resources are extremely scarce, and the adaptability of traditional frame piers is challenged.

[0003] Traditional frame piers mostly adopt the structure form of bent cap + column, the bent cap is used as a direct component for supporting the upper part, bears the concentrated force transmitted by the beam body through the support, and is subjected to the combined action of large bending moment and shear force, so that the bent cap section size is large, the material consumption is large, the appearance is heavy, and the cross-bridge spanning capacity is poor. In the case that the land under the bridge is limited, the structure stiffness needs to be improved by tensioning prestress, and the construction is complicated; meanwhile, due to uneven arrangement of the pier column, large eccentric tension is generated, and the structure size is also relatively heavy. The volume of the pier is too large, the concrete is subjected to severe hydration heat reaction, the surface of the pier is prone to cracking, and the heavy structure appearance does not meet the requirements of urban landscape. SUMMARY

[0004] The utility model aims at providing an arch bridge pier to solve the problems of heavy appearance, poor cross-bridge spanning capacity and complicated construction of the traditional frame pier.

[0005] The technical scheme of the utility model is: an arch bridge pier, which comprises a pier body, a pile cap and a pile foundation arranged in sequence from top to bottom, the pier body comprises a middle arch rib, side arch ribs and a pier top hat beam, the side arch ribs are located on both sides of the middle arch rib, the side arch ribs are semicircular cantilever beams, the pier top hat beam is located at the top of the middle arch rib and the side arch ribs, the top of the pile cap is provided with a pier arch seat, and the arch foot of one side of the middle arch rib and the arch foot of the side arch rib on the same side are connected together on the pier arch seat.

[0006] As a further improvement of the utility model, a column is arranged between the middle arch rib and the side arch rib, and the column is supported between the pier top hat beam and the pier arch seat.

[0007] As a further improvement of the utility model, the cross section of the pier arch seat is trapezoidal.

[0008] As a further improvement of the utility model, a plurality of support cushion stones are arranged on the top of the pier top hat beam along the length direction.

[0009] As a further improvement of the utility model, pier stop blocks are arranged at the two ends of the top of the pier top hat beam.

[0010] As a further improvement of the utility model, the pile cap is composed of a pier body and a cushion layer, and the cushion layer is located at the bottom of the pier body.

[0011] The utility model discloses an arch bridge pier, and the pier body is designed as an arch structure, compared with the traditional frame pier, the utility model makes full use of the advantages of large spanning capacity and high material utilization rate of the arch structure, saves building materials, and the light structure size solves the surface crack caused by the excessive hydration heat of concrete of the traditional frame pier. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the elevation schematic view of the utility model;

[0013] Figure 2 It is the side arrangement drawing of the utility model;

[0014] Figure 3 It is the A-A view in Figure 1

[0015] Figure 4 It is the plane schematic view of the pier top hat beam in the utility model;

[0016] Figure 5 It is the B-B view in Figure 1

[0017] Figure 6 It is the C-C view in Figure 1

[0018] Figure 7 It is the D-D view in Figure 1

[0019] Figure 8 It is the E-E view in Figure 1

[0020] Figure 9 It is the F-F view in Figure 1

[0021] In the drawing: 1, pier body;11, middle arch rib;12, side arch rib;13, stand column;14, pier top hat beam;15, support padstone;16, pier block;17, pier arch seat;2, bearing platform;21, platform body;22, cushion layer;3, pile foundation. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings.

[0023] For example, Figures 1-9 ​​​​​​As shown, an arch bridge pier comprises a pier body 1, a bearing platform 2 and a pile foundation 3 arranged in sequence from top to bottom, the pier body 1 comprises a middle arch rib 11, a side arch rib 12 and a pier top hat beam 14, the side arch rib 12 is located on both sides of the middle arch rib 11, the side arch rib 12 is a half-arch-shaped cantilever beam, the pier top hat beam 14 is located on the top of the middle arch rib 11 and the side arch rib 12, the bearing platform 2 is provided with a pier arch seat 17 on the top, the side arch rib 12 on the same side of the middle arch rib 11 is connected with the side arch rib 12 on the same side of the middle arch rib 11 on the same side of the middle arch rib 11.

[0024] A stand column 13 is arranged between the middle arch rib 11 and the side arch rib 12, and the stand column 13 is supported between the pier top hat beam 14 and the pier arch seat 17.

[0025] The cross section of the pier arch seat 17 is trapezoidal.

[0026] A plurality of support cushion stones 15 are arranged on the top of the pier top hat beam 14 along the length direction. The pier top hat beam 14 is provided with a pier stop block 16 at each end of the top.

[0027] The bearing platform 2 is composed of a platform body 21 and a cushion layer 22, and the cushion layer 22 is located at the bottom of the platform body 21.

[0028] The pier body 1 is a direct structure for bearing the upper load, which transmits the upper load to the pile foundation 3, and bears the wind load, earthquake and the like, so as to ensure the stability and safety of the bridge.

[0029] The pier top hat beam 14 is a load transmission member on the upper part of the arch rib (the middle arch rib 11 and the side arch rib 12), which adopts a rectangular cross section with a drip edge on both sides, is integrally poured with the middle arch rib 11 and the side arch rib 12, and is transitioned through a straight-line chamfer; the pier top hat beam 14 is connected with the arch rib in a variable height mode, so as to ensure the flatness of the pier top. The support cushion stone 15 is arranged on the top of the pier top hat beam 14, so as to ensure the close fit with the support, and the pier stop block 17 is arranged at each end, so as to ensure the safety and stability of the upper structure.

[0030] The middle arch rib 11 and the side arch rib 12 are both reinforced concrete solid plate structures, and the cross section is rectangular. The four corners are correspondingly cut into chamfers, so as to reduce the sharp part of the structure edge and increase the durability. The middle arch rib 11 is a rigid joint hinge-free arch, and the arch axis adopts a circular curve, which is the main load-bearing component of the pier. The side arch rib 12 is an arch-shaped cantilever beam, which presents a 1 / 2 middle arch rib 11 and has an upwardly curved "reverse arch" shape, so as to enhance the stability of the structure to a certain extent. When subjected to downward load, the fixed end forms a compressive stress and generates an upward counterforce, which is a component for assisting the middle arch rib 11 to bear the load. The arch foot of the middle arch rib 11 and the side arch rib 12 is connected with the pier arch seat 17, and the pier arch seat 17 is a trapezoidal body structure, which fully plays the compression resistance of the arch seat concrete and also has the function of beautiful appearance. The stand column 13 is arranged between the middle arch rib 11 and the side arch rib 12, which is fixed with the pier arch seat 17 at the lower part and connected with the pier top hat beam 14 at the upper part, so as to reduce the span of the pier top hat beam 14 and assist the arch rib to bear the load.

[0031] The pier abutment 17 is connected with the bearing platform 2, the bearing platform 2 bears the load transmitted by the arch rib and the column 13, and the load is evenly distributed to each pile foundation 3, so that the pile foundation 3 is balanced in stress. The platform body 21 adopts a beam-shaped structure, the section is rectangular, the reinforcing steel bars of the middle arch rib 11, the side arch rib 12, the column 13 and the pier abutment 17 are all anchored into the platform body 21. The bottom surface of the platform body 21 is poured with a plain concrete cushion 22, which plays the role of leveling the foundation pit, adjusting the elevation and sharing the bearing capacity of the platform body 21.

[0032] The pile foundation 3 is connected with the bearing platform 2, and the pile foundation 3 transmits the load to the soil layer with good bearing performance at a deep underground, so as to meet the requirements of bearing capacity and settlement. In order to make the pile foundation 3 and the bearing platform 2 more closely combined and prevent leakage in the later period, the pile foundation 3 extends into the bearing platform 2 by not less than 10 cm.

[0033] The middle arch rib 11, the side arch rib 12 and the column 13 in the utility model constitute the structure modeling of the abstract "lily", the appearance is beautiful, the uniform bridge pier form is avoided, the appearance image of the traditional frame pier with the cap beam is overcome, the landscape of the city is improved through the modeling of the utility model.

[0034] The utility model discloses a bridge pier which is light in structure, strong in spanning capacity, saves land and good in landscape effect, and has wide application prospect in city bridge construction.

Claims

1. An arch pier characterized by: The bridge pier comprises a pier body (1), a bearing platform (2) and a pile foundation (3) arranged in sequence from top to bottom, the pier body (1) comprises a middle arch rib (11), a side arch rib (12) and a pier top hat beam (14), the side arch rib (12) is located on both sides of the middle arch rib (11), the side arch rib (12) is a half-arch-shaped cantilever beam, the pier top hat beam (14) is located on the top of the middle arch rib (11) and the side arch rib (12), the bearing platform (2) is provided with a bridge pier arch seat (17) on the top, and the arch foot of one side of the middle arch rib (11) and the arch foot of the side arch rib (12) on the same side are jointly connected on the bridge pier arch seat (17).

2. An arch bridge pier according to claim 1, characterized in that: A stand column (13) is arranged between the middle arch rib (11) and the side arch rib (12), and the stand column (13) is supported between the pier top hat beam (14) and the bridge pier arch seat (17).

3. An arch bridge pier according to claim 2, wherein: The cross section of the bridge pier arch seat (17) is trapezoidal.

4. An arch bridge pier according to any one of claims 1-3, characterized in that: A plurality of support abutments (15) are arranged on the top of the pier top hat beam (14) along the length direction.

5. An arch bridge pier according to claim 4, wherein: Bridge pier stop blocks (16) are arranged at both ends of the top of the pier top hat beam (14).

6. An arch bridge pier according to claim 5, wherein: The bearing platform (2) is composed of a platform body (21) and a cushion layer (22), and the cushion layer (22) is located on the bottom of the platform body (21).

Images