Large-span full-assembly type novel beam-column type support structure

Abstract

The utility model discloses a large-span full-assembly type novel beam column type support structure which comprises a truss and a pair of supporting mechanisms arranged at the bottoms of the two ends of the truss, each supporting mechanism comprises at least two steel pipe stand columns arranged in parallel, concrete foundations are arranged at the bottoms of the steel pipe stand columns, sand cylinders are fixed to the tops of the steel pipe stand columns through column caps, and the steel pipe stand columns are connected with the concrete foundations. A bearing beam is fixed to the top of the sand cylinder, and the end of the truss is fixed to the bearing beam. The two ends of the truss are supported by the supporting mechanism composed of the steel pipe stand columns, the sand cylinders are arranged at the top ends of the steel pipe stand columns, and the concrete foundations are arranged at the bottom ends of the steel pipe stand columns, so that the supporting mechanism is rapidly disassembled and assembled, and the supporting mechanism can be recycled.

Description

Technical Field

[0001] The utility model relates to a new type of large-span fully assembled beam-column bracket structure. Background Art

[0002] As an indispensable support system in bridge construction, the support provides formwork support for the construction of large concrete structures of bridges and a construction platform for on-site construction workers. It must not only meet the strength, rigidity and overall stability during construction, but also create conditions for ensuring project quality, construction progress and improving work efficiency.

[0003] In the existing technology, although there are integral ground-mounted supports, in recent years, with the rapid development of my country's transportation infrastructure construction and the continuous planning of the transportation structure network, more and more special areas such as tidal flats and mountains have been included in the construction area. When building bridges, they need to cross soft soil areas, rivers, gullies and other special terrains. These areas have poor geological bearing capacity, are difficult to construct and have high processing costs, and have strict ecological and environmental protection. Or the site needs to cross complex environments such as rivers and roads, and the bridge span is large, which does not meet the conditions for using integral ground-mounted supports.

[0004] At present, for existing brackets, both ends are usually fixed directly to the base through steel columns. After the construction is completed, it is difficult to remove the steel columns, and they cannot be reused after removal, which greatly increases the construction cost and slows down the construction progress. Utility Model Content

[0005] In view of the above problems, the present invention provides a new type of large-span fully assembled beam-column support structure, which effectively solves the problems pointed out in the background technology.

[0006] The technical solution adopted in this utility model is:

[0007] A new type of large-span fully assembled beam-column support structure includes a truss and a pair of support mechanisms arranged at the bottom of both ends of the truss. The support mechanism includes at least two parallel steel pipe columns. The bottom of the steel pipe column is provided with a concrete foundation, and a sand cylinder is fixed to the top through a column cap. A load-bearing beam is fixed to the top of the sand cylinder, and the ends of the truss are fixed to the load-bearing beam.

[0008] Preferably, a flange is embedded in the concrete foundation, and the bottom end of the steel pipe column is fixedly connected to the flange by bolts.

[0009] The flange is embedded in the concrete foundation and used as a connecting piece for the steel pipe column, which facilitates the disassembly and installation of the bottom end of the steel pipe footing.

[0010] Preferably, the support mechanism is transversely fixed together between the steel pipe columns by means of parallel channel steels.

[0011] Preferably, the parallel channel steel is provided with a holding column, which is a threaded steel bar along the direction of the bridge, and forms a holding column as a whole with the parallel channel steel, so that the steel pipe column and the pier body are laterally fixed, thereby improving the stability of the steel pipe column. This structure does not require embedded parts in the pier body, reduces material waste, and improves the integrity of the pier body.

[0012] Preferably, the concrete foundation is placed on a pedestal, a circle of retaining strips is fixed on the pedestal around the concrete foundation, and a layer of fine sand is laid between the concrete foundation and the pedestal.

[0013] By laying fine sand between the concrete foundation and the pedestal, the bracket can be prevented from tilting, ensuring that the subsequent concrete foundation and the pedestal are tightly attached and flat. The setting of the retaining strip can prevent the fine sand from being lost during construction, so as to meet the requirement that the bracket foundation must be flat and solid.

[0014] The utility model adopts a support mechanism composed of multiple steel pipe columns to support both ends of the truss, and the top ends of the steel pipe columns adopt sand cylinders and the bottom ends adopt concrete foundations, thereby realizing rapid disassembly and installation of the support mechanism and enabling the support mechanism to be recycled.

[0015] The utility model uses a truss composed of Bailey plates, so that the truss can be lifted as a whole, avoiding the problem of repeated disassembly and assembly in the traditional method, and improving the construction efficiency of the bracket system.

[0016] Beneficial effects of the utility model:

[0017] 1. The support structure involved in the utility model has a wide range of applications and flexible combination. It can be applied to the construction of support structures with different beam widths and different support requirements. No embedded components are required and all components can be reused, saving resources and saving construction costs.

[0018] 2. Low construction cost, good economic benefits, no need to treat the foundation, no waste soil or slurry, green and environmentally friendly;

[0019] 3. The construction progress is fast, there is no need to deal with the foundation time, and the truss can be lifted and disassembled as a whole, the construction efficiency is high and the construction period is short;

[0020] 4. The foundation settlement is small and the quality is easy to guarantee. The support structure is set on the pedestal, and the settlement is less than that of the foundation. The quality of the beam line shape, pre-arch degree, etc. is more guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0023] Figure 3 for Figure 1 Schematic diagram of the side structure. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] The present invention will be described in further detail below through specific embodiments with reference to the accompanying drawings.

[0031] like Figure 1-3 As shown, a new type of large-span fully assembled beam-column support structure includes a truss 1 and a pair of supporting mechanisms arranged at the bottom of both ends of the truss 1. The supporting mechanism includes at least two parallel steel pipe columns 2. The bottom of the steel pipe column 2 is provided with a concrete foundation 3, and the top is fixed with a sand cylinder 5 through a column cap 4. The top of the sand cylinder 5 is fixed with a load-bearing beam 6, and the end of the truss 1 is fixed on the load-bearing beam 6.

[0032] A flange 7 is embedded in the concrete foundation 3 . The flange 7 is at the top of the concrete foundation 3 and serves as a connector connected to the bottom end of the steel pipe column 2 . The bottom end of the steel pipe column 2 is fixedly connected to the flange 7 by bolts.

[0033] The support mechanism is laterally fixed together between the steel pipe columns 2 by means of parallel channel steels 8 .

[0034] The parallel channel steel 8 is provided with a holding column 9, which is a threaded steel bar along the direction of the bridge, and forms a holding column as a whole with the parallel channel steel, so that the steel pipe column and the pier body are laterally fixed, thereby improving the stability of the steel pipe column. This structure does not require embedded parts in the pier body, reduces material waste, and improves the integrity of the pier body.

[0035] The concrete foundation 3 is placed on a cap 10 . A retaining strip is fixed around the cap 10 . A layer of fine sand is laid between the concrete foundation 3 and the cap 10 .

[0036] Fine sand is laid between the concrete foundation and the pedestal with a thickness of 1-2 cm, which can prevent the bracket from tilting and ensure that the subsequent concrete foundation and the pedestal are close and flat. During construction, after the concrete foundation is lifted onto the pedestal by lifting machinery, it is necessary to build retaining bars around the concrete foundation for protection. The setting of the retaining bars can prevent the fine sand from being lost during construction to meet the requirement that the bracket foundation must be flat and solid.

[0037] During construction, the specific steps of this utility model are as follows:

[0038] 1. Construction preparation: Inspection and acceptance of incoming steel pipe columns, trusses, load-bearing beams, column caps, sand cylinders, supporting columns, flanges, flat channel steels and other materials;

[0039] 2. Prefabrication of concrete foundation: According to the special design drawings of the support structure, use concrete and flanges of corresponding grades to make a foundation of corresponding specifications;

[0040] 3. Measurement and Layout: After the concrete foundation is completed and the foundation strength reaches 100%, the concrete foundation installation position is accurately laid out on the bridge cap according to the special design drawings of the support structure;

[0041] 4. Concrete foundation installation: 1-2cm thick fine sand is laid in the concrete foundation installation range to ensure that the subsequent concrete foundation is closely attached to the pedestal and flat. After the concrete foundation is hoisted by lifting machinery and the installation is completed, cement mortar masonry strips are used around the concrete foundation for protection to prevent the loss of fine sand during construction. After the concrete foundation is installed, the elevation is measured, and then the height of the steel pipe column to be erected is calculated based on the elevation of the bottom of the beam;

[0042] 4. Installation of steel pipe columns: After determining the required steel pipe length based on the calculated steel pipe column height, use lifting machinery to connect the steel pipe columns to the flanges embedded in the concrete foundation. During construction, due to the different heights of the support structure, if the steel pipe columns need to be extended, flange connection or butt welding followed by steel plate welding reinforcement can be used. When the flange connection bolts are connected, the directions of the two adjacent bolts entering the bolt holes should be opposite. The vertical deviation of the steel pipe column installation should not be greater than 1 / 500 of the pier height, and the column top offset value should not be greater than 50mm.

[0043] 5. System reinforcement and beam installation: After the installation of the steel pipe columns is completed, the parallel channel steels between the steel pipe columns and the supporting columns between the parallel channel steels and the pier body shall be constructed in a timely manner to ensure the overall stability of the support structure. The parallel channel steels in the transverse direction of the bridge shall be 16a double-jointed channel steels, and the supporting columns in the longitudinal direction of the bridge shall be 25 fine-rolled threaded steel. The supporting columns and the parallel channel steels shall be connected as a whole. The welds between the contact surfaces of the steel pipe columns and the parallel channel steels shall be bilateral continuous fillet welds (full welds) with a weld height of 8mm. The parallel channel steels shall be installed at one and no less than two locations every 2m vertically, and the supporting columns shall be installed at one and no less than two locations every 4m vertically.

[0044] To facilitate the subsequent dismantling of the trusses, after the reinforcement of the steel pipe column system is completed, a sand barrel is set on the top of each steel pipe column. The material and specifications of the sand barrel are consistent with those of the steel pipe column. The sand barrel is composed of a bottom barrel and a top barrel. During construction, the bottom barrel is filled with sand and the top barrel is filled with concrete. During construction, a sand excavation port is set in the bottom barrel by setting bolts. In order to ensure that the inside of the sand barrel is dense and reduce the settlement after the bracket is installed, the sand filling inside the sand barrel is compacted by using a jack + reaction frame method.

[0045] After the installation of the sand cylinder is completed, the load-bearing beam is installed on the top of the sand cylinder. The load-bearing beam is made of 2I45a I-steel. The load-bearing beam is assembled off-site and then installed as a whole. After the installation of the load-bearing beam is completed, a vertical steel plate is welded on the top of the sand cylinder to limit the load-bearing beam, thereby improving the stability of the double-jointed I45a I-steel beam.

[0046] 6. Installation of truss structure: The truss adopts finished large trusses. After the trusses are installed, the components should be checked for damage, bending deformation, gaps and other quality defects. The trusses are assembled off-site and then hoisted as a whole. They are assembled off-site according to the special design drawings of the bracket structure and the assembly instructions. The site should be flat during assembly. When installing the trusses, the trusses in the middle longitudinal position are installed first, and then the remaining trusses are installed symmetrically on both sides. After all the trusses are installed, the bottom is connected into a whole by horizontal connection to increase the overall stability of the truss.

[0047] The truss connection has the following main advantages over traditional double-layer Bailey beams and disc-shaped brackets: high safety and quality. Because the truss is composed of standard trusses and high-shear trusses, it has stronger bending stiffness and smaller deflection, which solves the problems of large deflection and poor shear resistance of double-layer Bailey beam structures, and provides safety for engineering construction; good economic benefits, the overall material utilization rate of the truss is high, and compared with traditional double-layer Bailey beams, the amount of steel used can be reduced by up to 50%. Under the premise of meeting the design requirements, the support frame can be flexibly assembled, while the traditional double-layer Bailey beam must install support frames on both the upper and lower layers, resulting in material waste; high construction efficiency. Compared with double-layer Bailey beams, the truss greatly reduces the installation and disassembly workload, and is designed with auxiliary installation tools to prevent rollover support rods, which effectively improves installation efficiency; the upper chord is designed with a top support fixing group, which can easily adjust the deflection. Compared with the traditional method of using discs to install top supports, it not only saves a lot of materials but also makes installation more convenient and quicker.

[0048] The main structure of the utility model is a steel pipe column, the bottom end of which is supported by a concrete foundation and the top end is connected by a sand barrel. Therefore, the steel pipe column does not need to be cut when dismantling and can be dismantled as a whole, which greatly improves the dismantling efficiency and can be reused. The remaining parts are also mostly connected by bolts, which is also very convenient to dismantle, and can greatly improve the construction efficiency.

[0049] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments and is subject to numerous variations. All variations that can be directly derived or conceived by a person of ordinary skill in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A new type of large-span fully assembled beam-column support structure, characterized in that: The invention comprises a truss (1) and a pair of supporting mechanisms arranged at the bottom of both ends of the truss (1), wherein the supporting mechanisms comprise at least two parallel steel pipe columns (2), the bottom of the steel pipe columns (2) is provided with a concrete foundation (3), the top of which is fixed with a sand cylinder (5) through a column cap (4), the top of the sand cylinder (5) is fixed with a load-bearing beam (6), and the end of the truss (1) is fixed on the load-bearing beam (6).

2. A large-span fully assembled new beam-column support structure according to claim 1, characterized in that: A flange (7) is pre-buried in the concrete foundation (3), and the bottom end of the steel pipe column (2) is fixedly connected to the flange (7) via bolts.

3. A large-span fully assembled new beam-column support structure according to claim 1, characterized in that: The supporting mechanism is transversely fixed between the steel pipe columns (2) via parallel channel steels (8).

4. A large-span fully assembled new beam-column support structure according to claim 3, characterized in that: The parallel channel steel (8) is provided with a holding column (9).

5. The large-span fully assembled new beam-column support structure according to claim 1 is characterized in that: The concrete foundation (3) is placed on a support (10), and a circle of retaining strips is fixed around the support (10) around the concrete foundation (3). A layer of fine sand is laid between the concrete foundation (3) and the support (10).

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