Prefabricated overwater assembly type pedestrian trestle

Abstract

The utility model provides a prefabricated overwater assembly type pedestrian walkway which comprises a prefabricated combined lower structure and an assembly splicing type upper structure, the lower structure comprises a tubular column pile foundation and a cover beam, the upper structure comprises a bridge deck slab and a guardrail, and the guardrail is fixedly connected with the upper end of the cover beam through a positioning assembly. Assembling parts used by the plank road are all made of ultra-high-performance concrete through modular prefabrication, meanwhile, each bridge span unit is formed by splicing the prefabricated ribbed plates and the prefabricated pile foundations on site, all structural parts are prefabricated in a factory and then transported to the site to be assembled, the construction progress is effectively accelerated, and the construction efficiency is improved. The method has the advantages of being simple in structure, small in influence on the surrounding environment, free of temporary building cost, short in maintenance time, thin and light in structure and good in visual effect from the side face, structural components are stable in performance and good in durability, and the method has high generalizability and high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a prefabricated waterborne assembled pedestrian walkway. Background Art

[0002] With the continuous enhancement of people's demand for landscapes and hydrophilic environments, walkways are widely used in engineering construction across water environments. Steel structure walkways have problems such as high cost, poor corrosion resistance, and poor durability, and are generally less used. Traditional cast-in-situ concrete structure walkways are widely used due to their advantages such as high stiffness and good integrity. However, this type of walkway usually requires full hall scaffolding and formwork support in water. The cast-in-situ construction method has many disadvantages, such as long construction period, large component volume, large pollution to water bodies, difficult construction quality control, low industrialization level, and low labor efficiency. Although steel structures and steel pipe concrete structures have light self-weights, they have application drawbacks such as expensive steel, easy rusting, poor fire resistance and durability, and high later maintenance costs. Content of the Utility Model

[0003] To sum up, the purpose of the utility model is to provide a prefabricated waterborne assembled pedestrian walkway with environmental protection, simple structure, stable performance, convenient installation, and short construction period.

[0004] To solve the above technical problems, the utility model provides a prefabricated waterborne assembled pedestrian walkway, which includes a prefabricated combined lower structure and an assembled and spliced upper structure. The lower structure includes pipe column foundations and capping beams, and the upper structure includes bridge decks and guardrails. The guardrails are fixedly connected to the upper ends of the capping beams through positioning components.

[0005] Both the lower structure and the bridge deck are prefabricated and formed by modularizing ultra-high performance concrete.

[0006] In a preferred embodiment: a groove extending along the axial diameter direction is provided at the upper end of the pipe column foundation, and a first connection hole vertically penetrating the groove is provided.

[0007] In a preferred embodiment: the groove is in snap-fit connection with the lower end of the capping beam, and a second connection hole corresponding to the position of the first connection hole is provided on the capping beam.

[0008] In a preferred embodiment: a first fastening component is further included. When the groove is in snap-fit connection with the lower end of the capping beam, the fastening component sequentially passes through the first connection hole and the second connection hole to fix the capping beam.

[0009] In a preferred embodiment: the positioning component includes a first part connected between the guardrail and the capping beam, and a second part perpendicular to the first part;

[0010] The first part is provided with a third connection hole along its height direction, and the third connection hole locks the positioning component on the upper end surface of the capping beam through a second fastening component.

[0011] In a preferred embodiment: the bridge deck is a ribbed slab, including a flat plate, main load-bearing beams spaced apart in a first direction below the flat plate, and secondary support beams perpendicular to the main load-bearing beams;

[0012] The beam height of the main load-bearing beam is greater than the effective thickness of the positioning component.

[0013] In a preferred embodiment: a relief notch is provided at the corner of the flat plate. When two adjacent flat plates are butted, a U-shaped bayonet is formed at the position of the relief notch for fitting with the positioning component.

[0014] In a preferred embodiment: the guardrail includes columns, crossbars and struts; there are multiple columns, all based on the positioning component and vertically and equally spaced upward at intervals with the capping beam as the length, there are multiple crossbars, respectively horizontally and spaced apart along the height directions of two adjacent columns; there are multiple struts, and their ends are inserted into the adjacent two crossbars through the reserved holes on the crossbars.

[0015] In a preferred embodiment: the water-binder ratio of the ultra-high performance concrete is not greater than 0.25; the maximum aggregate size is not greater than 0.5; the porosity is not greater than 5%.

[0016] In a preferred embodiment: the ratio of the wall thickness to the cross-sectional diameter of the pipe pile foundation is not less than 1 / 5.

[0017] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0018] The assembled components used in the plank road of the present utility model are all prefabricated in a modular manner with ultra-high performance concrete. At the same time, each bridge span unit is spliced on site by precast ribbed slabs and precast pile foundations. All structural parts are prefabricated in the factory and then transported to the site for assembly, effectively accelerating the construction progress, having little impact on the surrounding environment, eliminating the need for temporary erection costs, having a short maintenance time, having the advantages of a thin and light structure and good visual effect from the side, and the structural components having stable performance and good durability, and having strong popularization and high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric schematic view of the plank road of the present utility model;

[0020] Figure 2 is a front view of the plank road of the present utility model;

[0021] Figure 3 is a side view of the plank road of the present utility model;

[0022] Figure 4 It is an axonometric view of the upper end of the pipe column pile foundation;

[0023] Figure 5 It is an axonometric view of the capping beam;

[0024] Figure 6 It is an axonometric view of the bridge deck;

[0025] Figure 7 It is one of the side views of the bridge deck;

[0026] Figure 8 It is the second side view of the bridge deck;

[0027] Figure 9 It is an axonometric view of the guardrail;

[0028] Figure 10 It is the front view of the guardrail;

[0029] Figure 11 It is the side view of the guardrail. Specific implementation manners

[0030] 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a wall-mounted connection, a detachable connection, or an integral connection, can be a mechanical connection, an electrical connection, can be directly connected, or can be indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Reference Figures 1 to 11 As shown, the utility model provides a prefabricated and assembled trestle structure, which includes a prefabricated combined lower structure 1 and an assembled and spliced upper structure 2. The lower structure 1 includes a pipe column pile foundation 11 and a capping beam 12. The upper structure 2 includes a bridge deck 21 and a guardrail 22. The guardrail 22 is fixedly connected to the upper end of the capping beam 12 through a positioning component 123. In this embodiment, the bridge deck 21 in both the lower structure 1 and the upper structure 2 is prefabricated and formed in a modular manner using ultra-high performance concrete. By utilizing the "three highs" characteristics of ultra-high performance concrete, namely high workability, high strength, and high durability, the volume of traditional concrete components is effectively reduced, the material consumption and construction cost are significantly reduced, and the energy consumption in production, transportation, and construction is significantly improved.

[0034] Specifically, in terms of the connection relationship, a groove 111 extending along the axial diameter direction and a first connection hole 112 vertically penetrating the groove 111 are provided at the upper end of the pipe column pile foundation 11. A second connection hole 121 is provided at the lower end of the capping beam 12. When assembling the lower structure 1, the lower end of the capping beam 12 is clamped and matched with the groove 111 on the upper end of the pipe column pile foundation 11. After being clamped in place, the second connection hole 121 on the capping beam 12 and the first connection hole 112 on the pipe column pile foundation 11 are aligned and penetrated to form a channel for the first fastening component to pass through. In this embodiment, the first fastening component is a high-strength bolt group and a fixed end plate 122 clamped between the side wall of the groove 111 and the capping beam 12. Positioning components 123 are symmetrically arranged on both sides of the upper end of the capping beam 12. The positioning component 123 includes a first part connected between the guardrail 22 and the capping beam 12, and a second part perpendicular to the first part. A third connection hole is provided in the first part along its height direction. The third connection hole locks the positioning component 123 to the upper end surface of the capping beam 12 through a second fastening component. The second fastening component is a bolt.

[0035] The bridge deck 21 that plays a supporting role is a ribbed plate. Reference Figures 6 - 8As shown, it includes a flat plate 211, main load-bearing beams 212 spaced apart in the first direction at the lower part of the flat plate 211, and secondary support beams 213 perpendicular to the main load-bearing beams 212. The beam height of the main load-bearing beams 212 is greater than the secondary support beams 213 and greater than the effective thickness of the positioning assembly 123. In other words, when the bridge deck 21 is laid between the cap beams 12, in essence, the lower end of the main load-bearing beams 212 is directly overlapped on the cap beams 12 to support the bridge deck 21. The flat plate 211 transfers the vertical load it bears to the cap beams 12 through the main load-bearing beams 212. When the spans of the cap beams 12 at both ends are large, it can avoid the increase of the plate bending moment caused by the one-way plate load-bearing, which leads to brittle failure of the plate body. In addition, considering the coordination between the installation of the bridge deck 21 and the adjacent components, the corners of the flat plate 211 are provided with a clearance gap a. When two adjacent flat plates 211 are butt-jointed, a U-shaped slot is formed at the location of the clearance gap a, which is used to be assembled with the positioning components 123 on both sides of the upper end of the cap beam 12 to achieve tight installation of the bridge deck structure.

[0036] refer to Figures 9 - 11 As shown, the guardrail 22 of the utility model includes a column 221, a crossbar 222 and a support rod 223. There are multiple columns 221, all of which are based on the positioning assembly 123 and are evenly distributed vertically upward with the length of the cap beam 12 as the spacing. There are also multiple crossbars 222, which are horizontally spaced and laid along the height direction of two adjacent columns 221. There are also multiple support rods 223, and their ends are penetrated and installed on two adjacent crossbars 222 along the reserved holes on the crossbars 222.

[0037] The biggest difference between the utility model and the existing conventional prefabricated assembled plank road is that the lower structure 1 and the bridge deck 21 are both prefabricated by ultra-high performance concrete through modularization. Among them, the water-cement ratio of the ultra-high performance concrete is not more than 0.25, the maximum aggregate particle size is not more than 0.5, and the porosity is not more than 5%. In addition, in order to maximize the structural strength of the pipe column pile foundation 11 in the water environment for a long time, it is prevented from being damaged by freeze-thaw cycles and the threat of strong corrosion and damage by special media in the water body under extreme conditions. The wall thickness of the pipe column pile foundation 11 described in this embodiment is not less than 1 / 5 of its cross-sectional diameter. In addition, the pipe column pile foundation 11, the cap beam 12, the positioning assembly 123 and the bridge deck 21 are all prefabricated in the factory and then transported to the site for assembly, which can not only effectively speed up the construction progress but also have little impact on the surrounding environment, without the need for temporary erection costs, and from the side, it has the advantages of thin and light structure, good visual effect, good landscape effect, etc., and has strong promotion and high practical value.

[0038] As mentioned above, it is only the preferred specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model who makes non-substantive modifications to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.

Claims

1. A prefabricated waterborne assembled pedestrian walkway, comprising a prefabricated combined lower structure and an assembled and spliced upper structure, characterized in that: The lower structure includes pipe column foundations and capping beams, and the upper structure includes a bridge deck and guardrails. The guardrails and the upper ends of the capping beams are fixedly connected through positioning components. Both the lower structure and the bridge deck are prefabricated modularly with ultra-high performance concrete.

2. The prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The upper end of the pipe column foundation is provided with a groove extending along its axial diameter direction and a first connection hole vertically penetrating the groove.

3. The prefabricated waterborne assembled pedestrian walkway according to claim 2, characterized in that: The groove is in snap-fit connection with the lower end of the capping beam, and the capping beam is provided with a second connection hole that coincides with the hole position of the first connection hole.

4. A prefabricated waterborne assembled pedestrian walkway according to claim 3, characterized in that: It further includes a first fastening component. When the groove is in snap-fit connection with the lower end of the capping beam, the fastening component sequentially passes through the first connection hole and the second connection hole to fix the capping beam.

5. A prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The positioning component includes a first part connected between the guardrail and the capping beam and a second part perpendicular to the first part. The first part is provided with a third connection hole along its height direction, and the third connection hole locks the positioning component to the upper end face of the capping beam through a second fastening component.

6. The prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The bridge deck is a ribbed slab, including a flat slab, main load-bearing beams spaced apart in a first direction below the flat slab, and secondary support beams perpendicular to the main load-bearing beams. The beam height of the main load-bearing beam is greater than the effective thickness of the positioning component.

7. A prefabricated waterborne assembled pedestrian walkway according to claim 6, characterized in that: The corners of the flat slab are provided with relief notches. When two adjacent flat slabs are butted, a U-shaped bayonet is formed at the position of the relief notches for splicing with the positioning component.

8. A prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The guardrail includes columns, crossbars, and struts. There are multiple columns, all of which are vertically and equally spaced upward with the positioning component as the base and the capping beam as the spacing. There are multiple crossbars, which are horizontally spaced along the height directions of two adjacent columns respectively. There are multiple struts, and their ends are inserted into the adjacent two crossbars through reserved holes on the crossbars.

9. A prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The water-binder ratio of the ultra-high performance concrete is not greater than 0.25; the maximum aggregate size is not greater than 0.5; the porosity is not greater than 5%.

10. A prefabricated waterborne assembled pedestrian walkway according to claim 1, characterized in that: The ratio of the wall thickness of the pipe column foundation to its cross-sectional diameter is not less than 1 / 5.

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