Large cantilevered cap beam combined support

Abstract

The utility model relates to bridge construction technology field, concretely relates to a kind of large cantilever bent cap combined support;Including: stand, the stand top is provided with truss, and truss is provided with slope adjusting support, and slope adjusting support is provided with formwork on, the truss includes upper chord, lower chord and web, longitudinal parallel is arranged between upper chord and lower chord, and the length of lower chord is greater than the length of upper chord, web is between upper chord and lower chord, and it is designed to be inclined or perpendicular, and the connection of web and upper chord and lower chord is provided with bolt hole, and constitutes detachable structure.The large cantilever bent cap combined support, truss is provided with two groups, two groups of truss are assembled by connecting plate and bolt between two groups, and the detachable structure design between cooperation web and upper chord and lower chord makes that truss overall disassembly is convenient, can be repeatedly used, and strong adaptability, and reduce construction cost, and then it is favorable to popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a combined support for a large cantilever cap beam. Background Technology

[0002] In recent years, with the rapid development of urban construction, many cities have become increasingly urbanized. Simultaneously, due to the high demands for comprehensive development and utilization of the space under bridges, and the difficulty of land acquisition and demolition, the only solution to this problem is the development of urban viaducts. During the construction of urban viaducts, bridge deck widths are becoming increasingly wider. To ensure sufficient driving width on the bridge while also providing ample space and good visibility underneath, the concept of large cantilever cap beams has emerged. This type of cap beam effectively saves land resources, protects the environment, and possesses the characteristics of aesthetic appeal, improved urban landscape, and enhanced urban quality.

[0003] However, with the increasingly complex construction environment and the ever-increasing requirements for engineering quality, conventional cap beam trusses face problems such as complex installation and dismantling, insufficient load-bearing capacity and stability, and low adaptability of supports, which are not conducive to their widespread use. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. To overcome the aforementioned deficiencies of existing technologies, this utility model provides a large cantilever cap beam combined support, aiming to solve the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides a large cantilever cap beam combined support, comprising: a column, a truss on the top of the column, a slope adjustment support on the truss, and a template on the slope adjustment support; the truss includes an upper chord, a lower chord, and web members; the upper chord and the lower chord are arranged longitudinally parallel to each other, and the length of the lower chord is greater than the length of the upper chord; the web members are located between the upper chord and the lower chord, and are designed to be inclined or vertical; and the web members are connected to the upper chord and the lower chord with pre-set bolt holes, forming a detachable structure.

[0006] The columns are crucial components in the cast-in-place construction of the cap beam, primarily supporting and transferring the load of the superimposed cast-in-place concrete to the ground or foundation. The truss's main function is to temporarily support the cap beam formwork and all construction loads during the concrete pouring and curing stages, replacing future piers. The slope adjustment supports are used to precisely adjust the height and alignment of the cantilever truss to ensure the cap beam formwork is in the correct design and elevation position. The formwork utilizes an existing structure, providing a pre-designed container with precise dimensions and shape for the flowing concrete. It determines all external geometric dimensions of the cap beam, including length, width, height, and cantilever length. Two sets of trusses are assembled using connecting plates and bolts. The design, combined with the detachable structure between the web members and the upper and lower chords, allows for easy disassembly, reuse, and adaptability, while also reducing construction costs.

[0007] Preferably, the columns are arranged in two sets symmetrically in the longitudinal direction, and the column material is Ф630*10 steel.

[0008] The two sets of columns are evenly spaced, and the Ф630*10 steel columns have a high load-bearing capacity, good stability, are economical and efficient, and are quick to construct. It perfectly combines strong structural performance with good economic benefits.

[0009] Preferably, the column is equipped with a reinforcing cross brace, and the reinforcing cross brace has a "Z" shaped structure.

[0010] The "Z"-shaped reinforced cross bracing adopts an existing structure on the market, connecting the two sets of columns into a whole to work together, which greatly improves the stability and resistance to lateral deformation of the entire column assembly.

[0011] Preferably, a sand-dropping box is provided at the connection between the top of the column and the truss.

[0012] The drop sand box utilizes a commercially available structure, its function being to achieve a controlled, smooth, and safe load transfer and system transformation process. By slowly and evenly releasing sand, the drop sand box allows the columns to "shorten" very smoothly and gradually, thereby transferring the weight of the superstructure smoothly and progressively from the supporting columns to the structure itself. This process is virtually shock-free, ensuring the safety of the construction process.

[0013] Preferably, the truss is made of wide-edge H350 steel.

[0014] Using wide-flange H350 steel as the main material, a spatial truss structure is formed, which overcomes the deformation problem at the cantilever end. At the same time, the wide-flange H-beam has good compressive stability, ensuring the stability of the web members and lower chord members under compression.

[0015] Preferably, a distribution beam is provided between the truss and the slope adjustment support, and one or more distribution beams are evenly distributed.

[0016] The distribution beam is installed in this way to form a bottom-bearing design, directly transferring the load of the cap beam to the lower chord of the truss. The lower chord directly bears the load of the cap beam, greatly reducing the space occupied by the support system under the beam and avoiding traffic problems caused by height restrictions. During installation, a 2.5mm checkered steel plate is pre-installed on the top of the distribution beam. The main function of this 2.5mm checkered steel plate is to distribute the load, avoid stress concentration, prevent localized damage to the components, and allow for fine-tuning of the elevation to ensure levelness and that the structural alignment meets design requirements. It also facilitates adjustments and corrections during construction and provides an operational basis for subsequent unloading. This design reflects the professionalism of the construction technology and the control over quality and safety, demonstrating the practicality of this device.

[0017] The beneficial effects of this utility model are: In use, this utility model has two sets of trusses, which are assembled together by connecting plates and bolts. With the design of a detachable structure between the web members and the upper and lower chords, the truss can be easily disassembled, reused multiple times, and is highly adaptable. It also reduces construction costs and is therefore conducive to its widespread use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view structural diagram of the overall assembly of a specific embodiment of this utility model; Figure 2 This is a front view structural diagram of the truss according to a specific embodiment of the present utility model.

[0020] Part Name 1. Columns; 2. Reinforced cross bracing; 3. Truss; 301. Top chord; 302. Bottom chord; 303. Web members; 4. Unloading sand box; 5. Distribution beam; 6. Slope adjustment support; 7. Formwork. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings. Preferably, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Please see Figures 1 to 2 This utility model provides a large cantilever cap beam combined support, including: a column 1, a truss 3 at the top of the column 1, a slope adjustment support 6 on the truss 3, and a template 7 on the slope adjustment support 6. The truss 3 includes an upper chord 301, a lower chord 302, and a web member 303. The upper chord 301 and the lower chord 302 are arranged longitudinally parallel to each other, and the length of the lower chord 302 is greater than the length of the upper chord 301. The web member 303 is located between the upper chord 301 and the lower chord 302, and is arranged in an inclined or vertical manner. The design includes a detachable structure with pre-drilled bolt holes for connecting the web member 303 to the upper chord member 301 and the lower chord member 302. Two sets of columns 1 are arranged longitudinally symmetrically, and the column 1 is made of Ф630*10 steel. A reinforcing cross brace 2 is installed on the column 1, and the reinforcing cross brace 2 has a "Z" shaped structure. A sand box 4 is installed at the connection between the top of the column 1 and the truss 3. The truss 3 is made of wide-edge H350 steel. A distribution beam 5 is set between the truss 3 and the slope adjustment bracket 6, and there are more than one distribution beam 5 evenly distributed.

[0024] In this embodiment: First, install the column 1 at the designated location on site, and connect the columns 1 with the reinforcing cross bracing 2. Then, erect the truss 3 for temporary support and the operating platform. The top of the temporary support is made of 10*10 timber as the main rib. The operating platform is erected with a disc buckle bracket with a longitudinal and transverse spacing of 90*90cm and a step distance of 150cm. At the same time, the working layer is fully covered with scaffold boards.

[0025] Next, the two ends of the web member 303 are connected to the upper chord member 301 and the lower chord member 302 with bolts to form a truss 3. An external motor is used to hoist one side of the truss 3 onto a temporary support, and the bolts of the unloading sand box 4 are locked. After locking, the crane is unhooked, and the above steps are repeated to hoist the other side of the truss 3, and the trusses 3 are fixed together with bolts.

[0026] Next, install the distribution beams 5 on truss 3. During installation, the distribution beams 5 are installed from the center of the cap beam to the edge of the cantilever. After every three beams are installed, immediately lay patterned steel plates to fully enclose the work area.

[0027] Next, install the slope adjustment bracket 6 and formwork 7, and carry out the prestressed steel reinforcement construction. Before the concrete is poured, complete the horizontal connection of the top I-beam of the truss 3. The bottom horizontal connection can be achieved by welding the distribution beam 5 to the lower chord 302 with a spacing of no more than 3m. After welding, remove the temporary support and pour the concrete.

[0028] Then, loosen the sand box 4, remove the temporary support, dismantle the formwork 7, and pull out the bottom of the beam horizontally in pairs of the slope adjustment bracket 6 (by dragging with a hoist or jack, dragging symmetrically at two points). Then, dismantle the distribution beam 5 (leaving only the necessary horizontal connections).

[0029] Finally, weld truss 3 to the pre-reserved support steel bars at the top of the cap beam for temporary fixation. Weld at least two tie points and install temporary supports. Similar to the installation method, after the crane is in place and under load, release truss 3. After the crane is under load, remove the temporary tie points and remove truss 3 on the other side. Finally, remove column 1 and move to the next cap beam.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A combined support structure for a large cantilever beam, comprising: A column (1) is provided with a truss (3) at the top of the column (1), and a slope adjustment bracket (6) is provided on the truss (3), and a template (7) is provided on the slope adjustment bracket (6). The truss (3) is characterized in that the truss (3) includes an upper chord (301), a lower chord (302) and a web member (303). The upper chord (301) and the lower chord (302) are arranged in parallel longitudinally, and the length of the lower chord (302) is greater than the length of the upper chord (301). The web member (303) is located between the upper chord (301) and the lower chord (302) and is designed in an inclined or vertical manner. The web member (303) is connected to the upper chord (301) and the lower chord (302) with a pre-set bolt hole to form a detachable structure.

2. The large cantilever cap beam combined support as described in claim 1, characterized in that, The column (1) is arranged in two sets symmetrically in the longitudinal direction, and the column (1) is made of Ф630*10 steel.

3. The large cantilever cap beam combined support as described in claim 1, characterized in that, The column (1) is equipped with a reinforcing cross brace (2), and the reinforcing cross brace (2) is a "Z" shaped structure.

4. The large cantilever cap beam combined support as described in claim 1, characterized in that, A sand-dropping box (4) is provided at the connection between the top of the column (1) and the truss (3).

5. The large cantilever cap beam combined support as described in claim 1, characterized in that, The truss (3) is made of wide-rimmed H350 steel.

6. The large cantilever cap beam combined support as described in claim 1, characterized in that, A distribution beam (5) is provided between the truss (3) and the slope adjustment support (6), and there are more than one distribution beam (5) at equal intervals.

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