A pedestrian overpass and frame bridge pier

Abstract

The present invention discloses a pedestrian overpass and a frame bridge pier, wherein the frame bridge pier comprises piers arranged in parallel in the transverse direction of the bridge, pile foundations arranged in parallel in the transverse direction of the bridge, and a cap arranged on the top of a pair of the pile foundations arranged in the transverse direction of the bridge and used to carry a pair of the piers arranged in the transverse direction of the bridge; the top of the pier is provided with a cantilever beam extending in the length direction of the standard span main beam with a preset length and used to carry the standard span main beam. The frame bridge pier provided by the present invention can compensate for the span of the pedestrian overpass by adjusting the length of the cantilever beam extending relative to the piers arranged in the direction of the bridge. For pedestrian overpasses with different spans within a certain range, the pre-processed standard span main beam and the frame bridge pier can be used for assembly, which reduces the construction difficulty, thereby effectively accelerating the construction progress and reducing the construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge design, and in particular to a frame bridge pier. The present invention also relates to a pedestrian bridge with the frame bridge pier. Background Art

[0002] The main design scheme for pedestrian overpasses at this stage is to set main beams of the overpass of different lengths according to different spans.

[0003] End beams and corbels are set at both ends of the main beam to support the ladder. The position of the main beam bearing the ladder needs to be specially designed and force calculated. The construction of the pedestrian bridge can only be carried out if there are no immovable pipelines below the piers, but nowadays, more and more urban underground pipelines such as water supply, drainage, military optical fiber, electric wires and optical cables of major companies are arranged on both sides of the main roads. If the pipelines are dense and conflict with the lower foundation of the piers, the piers cannot be set at the pipelines, and the pier positions need to be reselected. Therefore, the bridge plan needs to be adjusted, but now the urban land is tight, and sometimes there is no suitable location for the piers, which makes the bridge plan difficult to implement. In addition, the length of the bridge is limited by the width of the urban road and the width of the sidewalk, so it is difficult to make a very reasonable adjustment to the beam length and pier position.

[0004] More importantly, the beam length of pedestrian overpasses is designed according to specific conditions, so the beam length of each overpass is different, which is not conducive to the standardized design of bridges, and can only use cast-in-place structures or steel structure bridges. The standard drawings of hollow slabs and small box beams with standard spans used in the highway industry and municipal industry can be cast in the beam factory, and then transported to the site for assembly after the main beam reaches a certain strength. This standardized design is not only convenient for construction but also low in cost. However, according to previous pedestrian overpasses, due to the length and function requirements, this method is not applicable, which brings great inconvenience to the construction of overpasses.

[0005] Therefore, how to solve the construction difficulties caused by the unequal spans of pedestrian overpasses has become a technical problem that technical personnel in this field need to solve. Summary of the invention

[0006] The object of the present invention is to provide a frame bridge pier, which solves the problem of difficulty in constructing pedestrian bridges with different spans, speeds up the construction progress and reduces the construction cost. Another object of the present invention is to provide a pedestrian bridge including the frame bridge pier.

[0007] To achieve the above-mentioned purpose, the present invention provides a frame bridge pier, including pier columns arranged in parallel in the transverse direction of the bridge, pile foundations arranged in parallel in the transverse direction of the bridge, and a pedestal arranged on the top of a pair of the pile foundations arranged in the transverse direction of the bridge and used to support a pair of the pier columns arranged in the transverse direction of the bridge; the top of the pier column is provided with a cantilever beam extending in a preset length toward the length direction of the standard span main beam and used to support the standard span main beam.

[0008] Optionally, a ground tie beam is connected between the piers arranged in the transverse direction of the bridge, the ground tie beam is arranged at the bottom of the pier and the bottom surface of the ground tie beam is higher than the cap;

[0009] The pair of cantilever beams are arranged in parallel, and further comprises a cross beam vertically connected between the pair of cantilever beams.

[0010] Optionally, a plurality of groups of the pile foundations are arranged along the direction of the bridge, the piers are arranged in one-to-one correspondence with the pile foundations, and the distance between adjacent pile foundations arranged along the direction of the bridge is greater than the span of the underground pipeline.

[0011] Optionally, the ends of a pair of outwardly extending cantilever beams are connected to a main beam support beam, and a support is provided on the upper end surface of the main beam support beam.

[0012] Optionally, the support platform is arranged below the ground, and the ground tie beam is provided with a sitting platform exposed on the ground for sitting.

[0013] Optionally, a tie beam is provided below the cantilever beam, and the tie beam is connected between adjacent piers arranged along the bridge direction.

[0014] Optionally, an elevator canopy is further included, and a preset gap is reserved between the tie beam and the cantilever beam for the elevator canopy to overlap the tie beam.

[0015] Optionally, a pedestrian platform is provided on the top of the cantilever beam.

[0016] Optionally, the sidewalk platform includes a platform body and support parts arranged on both sides of the bottom of the platform body, and the sidewalk platform is arranged in a direction parallel to the cross-bridge direction along the support parts.

[0017] The present invention also provides a pedestrian overpass, comprising the frame piers and the standard span main beam as described in any one of the above items, wherein the frame piers are arranged at both ends of the standard span main beam in the length direction, and the standard span main beam is mounted above the cantilever beam.

[0018] Compared with the above background technology, the frame bridge pier provided by the present invention solves the problem of construction difficulties caused by uneven spans of pedestrian bridges. By setting the length of the cantilever beam extending outward relative to the bridge pier along the length direction of the standard span main beam, the beam length can be adjusted to a certain extent. During the construction of the pedestrian bridge, the standard span main beam can be cast in the beam factory using a hollow slab or a small box beam of standard span. After the main beam reaches a certain strength, it is transported to the site for assembly of the standard span, i.e., length. This standardized design is not only convenient for construction but also low in cost. The span of the pedestrian bridge can be adjusted within a certain range by using a standard span main beam in combination with the length of the cantilever beam. There is no need to adjust the length of the main beam according to the span of the pedestrian bridge, thereby reducing the construction cost and construction difficulty. A cap is provided on the top of the pile foundation arranged in the transverse direction of the bridge, and piers extending in parallel in the transverse direction of the bridge are provided on the top of the cap. The cantilever beam is supported by the pile foundation, the cap and the pier. During the construction of the pedestrian overpass, it is only necessary to prefabricate cantilever beams of suitable lengths. After the frame piers are overlapped, the prefabricated main beams with standard spans are assembled and overlapped on top of the cantilever beams of the frame piers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a pedestrian bridge provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the mid-frame bridge pier;

[0022] Figure 3 for Figure 2 Middle III-III view;

[0023] Figure 4 for Figure 3 Ⅰ-Ⅰ view;

[0024] Figure 5 for Figure 3 II-II view;

[0025] Figure 6 for Figure 2 Middle IV-IV view;

[0026] Figure 7 This is a schematic diagram of the fixing of the elevator canopy;

[0027] Figure 8 for Figure 1 Schematic diagram of the sidewalk platform in.

[0028] in:

[0029] 01-standard span main beam, 02-underground pipeline, 1-pile foundation, 2-capping platform, 3-pier, 4-ground tie beam, 5-tie beam, 6-cantilever beam, 7-elevator canopy, 8-sidewalk platform, 81-platform body, 82-support part, 9-sidewalk guardrail, 10-crossbeam, 11-support, 12-elevator support pad stone, 13-main beam support beam. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Please refer to Figures 1 to 8 , Figure 1 A schematic diagram of a pedestrian bridge provided in an embodiment of the present invention is shown in FIG. Figure 2 for Figure 1 Schematic diagram of the middle frame bridge pier. Figure 3 for Figure 2 Middle III-III view, Figure 4 for Figure 3 The Ⅰ-Ⅰ view, Figure 5 for Figure 3 The Ⅱ-Ⅱ view, Figure 6 for Figure 2 Middle IV-IV view, Figure 7 This is a schematic diagram of the elevator canopy fixation. Figure 8 for Figure 2 Schematic diagram of the sidewalk platform in.

[0033] The frame bridge pier provided by the present invention includes pier columns 3 arranged in parallel in the transverse direction of the bridge, pile foundations 1 arranged in parallel in the transverse direction of the bridge, and a pedestal 2 arranged on top of a pair of pile foundations 1 arranged in the transverse direction of the bridge and used to support a pair of pier columns 3 arranged in the transverse direction of the bridge. A cantilever beam 6 is arranged above the pier column 3, and the cantilever beam 6 extends in the length direction of the standard span main beam 01, that is, along the bridge direction. By cooperating with the cantilever beam 6 and the standard span main beam 01, for pedestrian overpasses with different spans within a certain range, it is only necessary to prefabricate cantilever beams 6 with specific overhanging lengths, and with the help of the adjustable length of the cantilever beam 6 and the coordination with the standard span main beam 01, the construction of pedestrian overpasses with different spans can be completed without the need to cast additional main beams of different lengths. The above-mentioned along the bridge direction specifically refers to the length direction along the standard span main beam 01, and the transverse bridge direction refers to the length direction perpendicular to the standard span main beam 01.

[0034] The above-mentioned frame bridge piers have well solved the problem of construction difficulties caused by uneven spans of pedestrian bridges. During the construction of pedestrian bridges, the standard span main beam 01 can be cast in the beam factory using a standard span hollow slab, a small box beam, etc. After the main beam reaches a certain strength, it is transported to the site for assembly of the standard span, i.e., length. This standardized design is not only convenient for construction but also low in cost. The span of the pedestrian bridge can be adjusted within a certain range by using the standard span main beam 01 in conjunction with the length of the cantilever beam 6. There is no need to adjust the main beam length according to the span of the pedestrian bridge, which reduces the construction cost and difficulty.

[0035] The frame bridge pier provided by the present invention is introduced in more detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the specific embodiment provided by the present invention, Figure 1 The setting and support of the cantilever beam 6 are described in detail by taking the frame pier shown as an example. The frame pier structure includes a pile foundation 1 set below the ground, a cap 2 set on the top of the pile foundation 1, and a pier column 3 loaded on the cap 2 to support the standard span main beam 01. Here, the frame pier set at one end of the standard span main beam 01 includes four pile foundations 1, four pier columns 3 and two caps 2. Among them, the four pile foundations 1 are arranged in parallel in the transverse direction of the bridge in groups of two, and the two groups are overlapped at a preset interval along the longitudinal direction of the bridge. The cap 2 is set on the top of a pair of pile foundations 1 set in the transverse direction of the bridge, and the four pier columns 3 are set corresponding to the four pile foundations 1 respectively.

[0037] A group of cantilever beams 6 are provided on the top of a pair of piers 3 arranged along the bridge direction, and two groups of cantilever beams 6 extending in the length direction of the standard span main beam 01 are provided on the top of the four piers 3. The cantilever beams 6 are overlapped on the top of a pair of piers 3 arranged along the bridge direction. The length of the cantilever beams 6 extending outward relative to the piers 3 serves as the adjustable length of a single frame pier. Two frame piers are provided at both ends of the length direction of the standard span main beam 01, that is, when the length adjustment range of a single pedestrian bridge is within the length range from the length of a single standard span main beam 01 to the sum of the length of a single standard span main beam 01 and twice the adjustable length, the length of the pedestrian bridge can be adjusted by adjusting the overlap position of the standard span main beam 01 and the cantilever beam 6, without the need to cast the main beam, thereby reducing the construction progress.

[0038] The standard span main beam 01 is cast and formed in a beam factory using standard parts such as hollow slabs and small box girders of standard span. The standard span main beam 01 is cast into a standard span main beam 01 of a first preset span, a standard span main beam 01 of a second preset span, etc. according to the number of standard parts such as hollow slabs. The standard span main beam 01 can be prefabricated in a beam factory and then installed with the frame piers. By adjusting the length of the cantilever beam 6, the design of the standard span main beam 01 is standardized.

[0039] The cantilever beam 6 mainly cooperates with the standard span main beam 01 to adjust the span of the pedestrian overpass. By reasonably setting the support position of the pier 3 and the overhanging length of the cantilever beam 6, it is possible to effectively ensure support for the standard span main beam 01 and prevent the cantilever beam 6 from turning inward.

[0040] In a preferred embodiment provided by the present invention, please further refer to Figures 2 to 6 A pair of parallel cantilever beams 6 are provided at the top of the pier 3, and multiple groups of cross beams 10 arranged in the transverse direction of the bridge are connected between the pair of cantilever beams 6. The top frame structure of the frame pier is formed by connecting the pair of cantilever beams 6 through multiple groups of cross beams 10, which effectively prevents the cantilever beams 6 from turning inward. A ground tie beam 4 is connected between the bottoms of the pair of piers 3 arranged in the transverse direction of the bridge, and the arrangement of the ground tie beam 4 can effectively improve the stability of the pier 3 and the frame pier.

[0041] Obviously, in the above embodiment, the cantilever beam 6 is not limited to being set in two groups, and the cross beam 10 and the cantilever beam 6 can be cast in one piece, and the frame structure formed by the cross beam 10 and the cantilever beam 6 can significantly improve the stability of the cantilever beam 6 and prevent the cantilever beam 6 from turning inward. The ends of the pair of cantilever beams 6 extending outward are provided with a main beam support beam 13, and the top of the main beam support beam 13 is provided with a plurality of supports 11 for supporting the standard span main beam 01.

[0042] In order to prevent the underground pipeline 02 from affecting the arrangement of the pile foundation 1, the pile spacing between the two groups of pile foundations 1 arranged along the bridge is increased to be greater than the span (width) of the underground pipeline 02. Usually, the height of the cap 2 is related to the shear resistance. When the shear resistance is met, increasing the pile spacing requires increasing the height of the cap 2. In this example, the design of the cap 2 is carried out using the frame beam method. On the premise that the bending resistance, shear resistance and crack width of the cap 2 meet the requirements of the specification, the pile spacing can be adjusted on the premise that the height of the cap 2 is minimized and the top of the cap 2 is set below the ground.

[0043] The cap 2 and the ground tie beam 4 can be arranged underground, or above the ground as required. The ground tie beam 4 can be provided with a sitting platform for pedestrians to sit and rest, and the sitting platform can be provided with a stone slab or a stone step shape.

[0044] Furthermore, the tie beam 5 arranged on the top of the pier 3 is specifically located below the cantilever beam 6, and is arranged in the same direction extending along the bridge as the cantilever beam 6. The tie beam 5 is connected and fixed between adjacent piers 3 arranged along the bridge. A preset gap is provided between the tie beam 5 and the cantilever beam 6 for the elevator canopy 7 to be overlapped and fixed, so that the elevator canopy 7 can be overlapped and fixed on the tie beam 5 through the preset gap. This reduces the difficulty of the overpass main beam design and facilitates construction. The connection between the cantilever beam 6 and the elevator is provided with an elevator support pad stone 12 for the elevator to overlap.

[0045] A sidewalk platform 8 is also provided at the top of the cantilever beam 6, and the height of the top of the cantilever beam 6 is adjusted to be flush with the standard span overpass through the sidewalk platform 8. The sidewalk platform 8 is concave, and includes a plate-shaped platform body 81 and support portions 82 arranged on both sides of the width direction of the platform body 81. The support portions 82 are integrally formed with the platform body 81, and the length direction of the support portions 82 is arranged parallel to the transverse direction of the bridge. By adopting a sidewalk platform 8 with support portions 82 of different heights, it is possible to achieve a flush arrangement with the upper end surface of the standard sidewalk platform 8 and the standard span main beam 01.

[0046] The present invention also provides a pedestrian bridge, including the standard span main beam 01 and frame bridge piers described in the above embodiment, and the frame bridge piers are two groups, and the two groups of frame bridge piers are arranged at both ends of the length direction of the standard span main beam 01. The standard span main beam 01 is overlapped and fixed on the top of the cantilever beam 6, and after overlap and fixation, it can be fixed by means of steel bar welding and pouring concrete. Sidewalk guardrails 9 are arranged on both sides of the standard span main beam 01 to protect pedestrians. The other parts of the pedestrian bridge can refer to the existing technology, and this application will not be elaborated in detail.

[0047] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0048] The above is a detailed introduction to the pedestrian overpass and frame pier provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A frame bridge pier, characterized in that: Piers (3) arranged in parallel in the transverse direction, pile foundations (1) arranged in parallel in the transverse direction, and a cap (2) arranged on the top of a pair of pile foundations (1) arranged in the transverse direction and used to carry a pair of piers (3) arranged in the transverse direction; a cantilever beam (6) extending in a preset length in the length direction of a standard span main beam (01) and used to carry the standard span main beam (01) is arranged on the top of the pier (3); the transverse direction is perpendicular to the length direction of the standard span main beam (01); A ground tie beam (4) is connected between the piers (3) arranged in the transverse direction of the bridge, the ground tie beam (4) is arranged at the bottom of the pier (3) and the bottom surface of the ground tie beam (4) is arranged higher than the cap (2); The pair of cantilever beams (6) are arranged in parallel, and further include a crossbeam (10) vertically connected between the pair of cantilever beams (6), wherein the crossbeam (10) and the cantilever beams (6) are integrally cast; A plurality of groups of pile foundations (1) are arranged along the longitudinal direction of the bridge, the longitudinal direction of the bridge being the length direction along the main beam (01) with a standard span, the piers (3) are arranged one-to-one with the pile foundations (1), and the distance between the pile foundations (1) arranged adjacent to each other along the longitudinal direction of the bridge is greater than the span of the underground pipeline (02); The ends of a pair of cantilever beams (6) extending outward are connected to a main beam support beam (13), and a support (11) is arranged on the upper end surface of the main beam support beam (13).

2. The frame bridge pier according to claim 1, characterized in that: The support platform (2) is arranged below the ground, and the ground tie beam (4) is provided with a sitting platform exposed above the ground for sitting.

3. The frame bridge pier according to claim 2, characterized in that: A tie beam (5) is provided below the cantilever beam (6), and the tie beam (5) is connected between adjacent piers (3) arranged along the bridge direction.

4. The frame bridge pier according to claim 3, characterized in that: It also includes an elevator canopy (7), and a preset gap is reserved between the tie beam (5) and the cantilever beam (6) for the elevator canopy (7) to overlap the tie beam (5).

5. The frame bridge pier according to any one of claims 1 to 4, characterized in that: A sidewalk platform (8) is provided on the top of the cantilever beam (6).

6. The frame bridge pier according to claim 5, characterized in that: The sidewalk platform (8) comprises a platform body (81) and support parts (82) arranged on both sides of the bottom of the platform body (81), and the sidewalk platform (8) is arranged in a direction parallel to the cross bridge direction along the support parts (82).

7. A pedestrian bridge, characterized in that: It comprises the frame bridge pier as described in any one of claims 1 to 6 and the standard span main beam (01), wherein the frame bridge pier is arranged at both ends of the length direction of the standard span main beam (01), and the standard span main beam (01) is mounted above the cantilever beam (6).

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