Bridge cast-in-place section beam body construction support

Abstract

A kind of bridge cast-in-place section beam body construction support, steel foundation is arranged on ground, several groups of steel pipe piles are uniformly and interval arranged on the upper surface of steel foundation, steel plate is arranged on steel pipe pile, sand box is arranged on steel plate, several groups of sand boxes are interval arranged on concrete structure, the upper surface of several groups of sand boxes on concrete structure is provided with crossbeam, the upper surface of several groups of sand boxes on steel plate is provided with crossbeam, several groups of longitudinal beams are arranged between two groups of crossbeams, beam body is arranged on the upper surface of longitudinal beam, the sand box top elevation of steel plate and concrete structure is changed along with beam body elevation;The utility model forms modular support, solve the inadaptability of full hall support to terrain, save the time-consuming process such as pile foundation piling, pouring etc., greatly shorten foundation construction period, environment influence is small, green environmental protection, material recycling rate is high, the requirement of low to construction site, strong adaptability, reduce construction difficulty, improve efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of highway engineering box girder construction technology, specifically relating to a construction support for the cast-in-place section of a bridge beam. Background Technology

[0002] In the construction of cast-in-place beams for highway bridge engineering, pile foundation is a mature and widely used key temporary structural technology. Pile foundation typically uses driven steel pipe piles as the support foundation to transfer the superstructure load to the deeper soil layer.

[0003] However, as engineering construction expands to areas and projects with stringent environmental protection requirements, complex geological conditions, and tight schedules, the inherent defects of this traditional pile foundation construction technology are becoming increasingly prominent, mainly in the following aspects: Poor adaptability to complex geological conditions: Pile foundation construction requires the foundation to have a certain bearing capacity and stability. When encountering complex geological conditions such as soft soil foundations, thick silt layers, or high groundwater levels, steel pipe piles are difficult to achieve effective embedment depth and lateral restraint, easily leading to uneven settlement or even instability. To ensure bearing capacity, it is often necessary to increase the pile length, pile diameter, or number of piles, or even carry out complex foundation treatments (such as replacement, dewatering, grouting, etc.), which not only significantly increases the workload and technical difficulty but also introduces additional quality risk points.

[0004] The construction process is complex and time-sensitive: Driving steel pipe piles is an arduous task requiring large piling equipment (such as pile drivers and cranes). In projects with limited equipment resources (such as the equipment allocation difficulties in a Southeast Asian bridge project undertaken by our company), equipment arrival, assembly, and construction efficiency become critical factors restricting the project schedule. The construction process includes multiple stages such as surveying and positioning, pile driver placement, pile hoisting, pile driving, and pile splicing. The procedures are complex and time-consuming, making it difficult to meet extremely tight project deadlines.

[0005] Significant environmental impact and low environmental compatibility: Piling operations generate severe noise, vibration, and water pollution, as well as soil compaction and disturbance. In areas with high environmental requirements (such as near residential areas, ecological reserves, or Southeast Asia where environmental regulations are strictly enforced), such construction activities are easily restricted or even prohibited. Furthermore, the driving and subsequent removal of steel pipe piles can severely damage the original soil, potentially causing soil erosion or adversely affecting the foundations of surrounding structures, contradicting the principles of green construction and sustainable development.

[0006] Low economic efficiency and safety: The additional foundation treatment required to solve complex foundation problems, the use of large specialized equipment, and the extended construction period all directly lead to increased project costs. At the same time, if the foundation treatment does not fully meet the standards, or if there is uneven settlement between the steel pipe piles, it will directly threaten the stability and safety of the entire system, bringing huge quality and safety risks to the large-volume concrete pouring.

[0007] In summary, when faced with multiple constraints such as equipment shortages, tight schedules, stringent environmental regulations, and complex geological conditions, the reliance on driven steel pipe pile foundation technology reveals significant technical shortcomings, including cumbersome processes, insufficient adaptability, low efficiency, and poor environmental compatibility. Therefore, there is an urgent need to develop a new type of support foundation that is simple to treat, quick to construct, geologically and environmentally friendly, and safe and reliable, in order to overcome the limitations of traditional techniques and ensure high-quality, safe, and timely completion of the project. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a construction support for the cast-in-place beam section of a bridge, which eliminates time-consuming procedures such as pile driving and pouring of pile foundations and greatly shortens the foundation construction cycle.

[0009] The technical solution adopted to solve the above-mentioned technical problems is: a construction support for the cast-in-place bridge beam, wherein the steel foundation is set on the ground, and several sets of steel pipe piles are evenly distributed and spaced on the upper surface of the steel foundation. Steel plates are set on the steel pipe piles, and sand boxes are set on the steel plates. Several sets of sand boxes are spaced on the concrete structure, and crossbeams are set on the upper surface of the several sets of sand boxes on the concrete structure. Crossbeams are also set on the upper surface of the several sets of sand boxes on the steel plates. Several sets of longitudinal beams are set between two sets of crossbeams. The beam is set on the upper surface of the longitudinal beams. The top elevation of the sand boxes set on the steel plates and concrete structure changes with the elevation of the beam.

[0010] The width of the steel foundation of this utility model is at least 50cm greater than the diameter of the steel pipe pile.

[0011] The present invention provides a bottom stiffening rib between the steel foundation and the steel pipe pile.

[0012] The present invention provides a top stiffening rib between the steel plate and the steel pipe pile.

[0013] The steel foundation of this utility model is composed of several sets of H-beams connected together, and foundation stiffening ribs are provided between the upper and lower flanges and the web of the H-beams.

[0014] Because the steel foundation of this utility model is composed of several sets of H-beams connected together, and several sets of steel pipe piles are set on the upper surface of the H-beams, with steel plates and sandboxes set on the steel pipe piles in sequence, and corresponding sandboxes are set on the concrete structure. The sandboxes are used for elevation adjustment. Several sets of longitudinal beams are set between two sets of crossbeams to form a modular support, which eliminates time-consuming processes such as pile driving and pouring of pile foundations, greatly shortens the foundation construction cycle, has little environmental impact, is green and environmentally friendly, has a high material recycling rate, low requirements for construction sites, strong adaptability, reduces construction difficulty, and improves efficiency. At the same time, the use of sandboxes to adjust the elevation is more adaptable to the construction rhythm, has high flexibility, is easy to adjust and dismantle, and saves labor and large equipment. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of this utility model.

[0016] Figure 2 yes Figure 1 The front view.

[0017] In the diagram: 1. Steel foundation; 2. Foundation stiffening rib; 3. Steel pipe pile; 4. Top stiffening rib; 5. Steel plate; 6. Sandbox; 7. Horizontal beam; 8. Longitudinal beam; 9. Concrete structure; 10. Bottom stiffening rib; 11. Beam body. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments. Example 1

[0019] exist Figure 1 , 2The present invention relates to a bridge cast-in-place beam construction support, comprising a steel foundation 1, which is composed of several sets of H-beams connected together. Stiffening ribs 2 are provided between the upper and lower flanges and the web of the H-beams to increase the load-bearing capacity of the steel foundation 1. The steel foundation 1 is set on the ground. Several sets of steel pipe piles 3 are evenly spaced and vertically arranged on the upper surface of the steel foundation 1. Steel plates 5 are set on the steel pipe piles 3, and sandboxes 6 are set on each of the steel plates 5. Correspondingly, several sets of sandboxes 6 are spaced on the concrete structure 9. In practice, crossbeams 7 are set on the upper surface of the several sets of sandboxes 6 on the concrete structure 9, and crossbeams 7 are set on the upper surface of the several sets of sandboxes 6 on the steel plates 5. Several sets of longitudinal beams 8 are set between two sets of crossbeams 7. The beam 11 is set on the upper surface of the longitudinal beams 8. The sandboxes 6 can freely adjust their elevation within a certain range to ensure the construction quality of the beam 11, while also facilitating disassembly and reducing material waste. In practice, the specifications and quantities of steel foundation 1, steel pipe pile 3, sand box 6, crossbeam 7, and longitudinal beam 8 are calculated based on the weight and stress of beam 11. It is necessary to ensure that the width of steel foundation 1 is at least 50cm greater than the diameter of steel pipe pile 3. To ensure the stability of the support structure, bottom stiffening ribs 10 are installed between steel foundation 1 and steel pipe pile 3, and top stiffening ribs 4 are installed between steel plate 5 and steel pipe pile 3.

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