Jig frame supporting system of special-shaped large-section annular prestressed concrete structural beam

Abstract

A jig frame supporting system of a special-shaped large-section annular prestressed concrete structural beam comprises a bearing platform, stand columns and stand column connecting rods, the stand columns are connected through the stand column connecting rods to form a frame body, and the bearing platform is arranged at the top of the frame body. The bearing platform is used for temporarily bearing the weight of the special-shaped large-section annular prestressed concrete structural beam and the template system thereof; the column connecting rod is horizontally or obliquely arranged; the bearing platform comprises profile steel keels arranged in a crisscross manner, and the bottoms of the profile steel keels are fixedly connected with the vertical rods through bolts; the bearing platform is connected with the stand columns through bolts, and the stand columns are connected with the stand column connecting rods through bolts. Compared with an existing plate buckle type scaffold supporting system, the jig frame supporting system has the advantages of being small in overall weight, high in bearing capacity, convenient to produce in batches, convenient and fast to install and low in labor requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of the erection of concrete formwork, in particular to a falsework support system for a special-shaped large-section circular prestressed concrete structural beam. Background Technique

[0002] In a reinforced concrete structure project, a large parallelogram ring beam and 36 structural column slices (with a cross-section of **) below the ring beam are used to support and transfer the load. During the structural construction process, the structural column slices are constructed first, and then the large ring beam is constructed. Since the steel bars, formwork, and concrete processes during the construction of the large ring beam cannot directly transfer the force through the already constructed structural column slices, an effective support system is still needed to transfer the load of the entire construction process to the foundation. Considering the huge cross-section of the ring beam, its internal steel bars are dense, and the weight per meter along the beam direction reaches 72t, and the beam is a perfect circle and arranged in a circular direction, so the selection and design of this support system are particularly important.

[0003] At present, for the conventional formwork support system exceeding a certain scale, a tool-type scaffolding is mainly used to achieve it (such as a disk-type scaffolding), that is, an overall load-bearing frame system is assembled by combining components, and the stress members achieve a stable and stable effect through the structural members.

[0004] However, the above-mentioned tool-type scaffolding also has its defects. For example, for a structural beam with a construction cross-sectional area within 10 ㎡, the spacing of the load-bearing vertical poles of the entire scaffolding needs to reach 600*600, and the stable diagonal braces are almost fully arranged between them, the member structure is dense, the labor cost for erection is relatively high, and the construction period of the large structural beam is long, resulting in a relatively long rental period of the scaffolding. The large ring beam of this project is a large parallelogram ring-shaped structural beam, and its own load and the projected support area are huge. If a disk-type scaffolding is used to erect a temporary support, it will inevitably lead to an excessive amount of overall materials; moreover, the ring beam is a perfect circle as a whole, which does not match the square modulus of the disk-type scaffolding; furthermore, the overall height of the ring beam from the bearing surface of the foundation is as much as, and the infinite amplification of the overall height-width ratio and reinforcement measures of the scaffolding erected by the disk-type scaffolding will also affect the overall safety.

[0005] For the above reasons, for special-shaped and large-section circular prestressed concrete structural beams, it is urgently necessary to propose a new temporary support system during construction. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the above defects and propose a steel structure support falsework system with a small floor area, good support rigidity, and capable of flexible erection.

[0007] In order to achieve the above purpose, the utility model is realized as follows:

[0008] A falsework support system for a special-shaped large cross-section circular prestressed concrete structural beam, comprising a load-bearing platform, columns and column tie rods. There are multiple columns which are connected by column tie rods to form a framework. A load-bearing platform is arranged at the top of the framework, and the load-bearing platform is used to temporarily bear the weight of the special-shaped large cross-section circular prestressed concrete structural beam and its formwork system; the column tie rods are arranged horizontally or obliquely, so as to realize the horizontal connection and inclined strengthening connection between adjacent columns; the load-bearing platform includes steel section keels arranged in a criss-cross manner, and its bottom is fixedly connected to the vertical poles by bolts; between the load-bearing platform and the columns, and between the columns and the column tie rods, they are connected by bolts.

[0009] Further, for the falsework support system of the special-shaped large cross-section circular prestressed concrete structural beam, the columns are spliced. Column connection flanges are arranged at both end parts on the sides of the columns. Adjacent columns are butt-jointed through the column connection flanges and fixed connections are realized by passing bolts through the column connection flanges.

[0010] Further, for the falsework support system of the special-shaped large cross-section circular prestressed concrete structural beam, the column tie rods are spliced. Tie rod connection flanges are arranged at both end parts on the sides of the column tie rods. The vertical tie rods are bolted to each other through the tie rod connection flanges or bolted to the vertical poles.

[0011] Further, the falsework support system of the special-shaped large cross-section circular prestressed concrete structural beam further includes connection ends. The connection ends are used for connecting adjacent upper and lower vertical poles or between a vertical pole and the vertical tie rods on both sides. End flanges are arranged at the top, bottom and sides of the connection ends. The end flanges are used for connecting with the column connection flanges or the tie rod connection flanges through bolts.

[0012] Compared with the disc buckle type scaffolding support system, the falsework support system proposed by the present utility model has the characteristics of batch production in factories, convenient installation, small overall weight, high degree of mechanization, less manual labor required for erection, and good integrity.

[0013] Further, when the falsework support system proposed by the present utility model is applied to the special-shaped large cross-section circular prestressed concrete structural beam, it has the following advantages:

[0014] 1. The jig is composed of round steel pipes, steel plate flange plates, and high-strength bolts. The steel pipe columns of the jig are uniformly processed and cut into fixed-size lengths in the factory. Both ends are fully welded to the flange plates to form single steel pipe columns, and stiffening rib plates are welded around the steel pipes to ensure stability. Four steel pipe columns are connected by steel pipe connecting rods in different directions to form a single-frame jig. The connecting rods are also connected through flange plates, and the connecting ends of the steel pipes are welded to the intersecting grooves of the steel columns by groove welding. Two single-frame jigs are then connected by steel pipe connecting rods to form a combined jig. In this project, the single-span ring beam between the structural sheet columns is supported by two groups of combined jigs at the same time. The combined jigs are further connected by steel pipe members, so that the jigs under each section of the ring beam form an integral whole. At this time, the spacing and angle of a single combined jig are controlled by adjusting the angle of the steel pipe connecting members, so that the jig is arranged along the circular ring beam.

[0015] 2. Differences and advantages compared with the application level of the disc buckle scaffolding:

[0016] The scaffold support system of this project is strictly different from the disc-type scaffold. The disc-type scaffold has a relatively simple structural component, mainly consisting of vertical poles (including connecting plates), horizontal bars, and diagonal braces. The spacing modulus of the vertical poles and horizontal bars is fixed, and the diagonal braces are arranged in accordance with the vertical pole and horizontal bar modulus to form a whole frame. The scaffold support system is composed of two single scaffolds (four columns assembled together) combined into a single-piece scaffold structure. Since the cross-section of the ring beam remains unchanged, the height of the single-piece scaffold structure and its combined size remain unchanged, that is, the scaffold support system of the ring beam is connected by several groups of single-piece scaffold structures. The scaffold support system of each section of the ring beam is evenly arranged in a matrix around the center of the circle. During the erection process, it is only necessary to adjust the connecting rods between each section of the scaffold system to control the connection distance. At this time, the scaffold support system of each section of the ring beam can be regarded as a combination of four scaffold structures, and the scaffold support system of the entire ring beam is composed of several identical combinations. Therefore, the installation accuracy of the entire tire frame system mainly lies in the installation of each single tire frame and the installation of each section of the ring beam tire frame system. The installation of the tire frame is an assembled assembly process, and it is convenient to cooperate with mechanical lifting. The landing point of each column of the tire frame is particularly important. Strict positioning and lofting are required before installation, otherwise the entire tire frame system will deviate from the force projection area of ​​the ring beam, affecting the structural load. The installation of the tire frame does not require too many operators, and only 4 operators are required for the installation of each tire frame. The installation accuracy of the tire frame is high. Accurate positioning and connection can enable better and more convenient assembly, reduce on-site cutting and waste of rod materials, and better fit the force surface of the ring beam. Compared with the conventional disc-type scaffolding, the frame support system is directly optimized in the support structure construction, using less steel to achieve temporary support and load-bearing of the structure; the frame content is small, the floor space is small when the material is not circulated, and the installation and dismantling cycle is short; the installation is carried out by factory-standard processing and on-site assembly, which greatly reduces the pressure of materials and manpower input; the structural system of a single-frame frame and a single-piece combined frame is used for assembly, and the connecting rods with adjustable direction and angle are connected to form a whole, avoiding the problem of non-compliance with the module, fitting the load-bearing surface of the structural beam, and the load is more uniform. At the same time, each section of the connecting rod and the column are fixed with a flange through a high-strength bolt, reducing possible quality problems in welding, and the operation is simple, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of using the tire frame support system to support a special-shaped large-section annular beam.

[0018] Figure 2 for Figure 1 A partial enlarged view of .

[0019] Figure 3 for Figure 2 A partial enlarged view of .

[0020] Figure 4It is a schematic diagram of the method for column foot.

[0021] Figure 5 It is Figure 1 a partial longitudinal sectional view of.

[0022] Figure 6 It is Figure 5 a partial enlarged view of.

[0023] Figure 7 It is Figure 5 a partial top view of. Specific implementation manner

[0024] Next, the technical solutions of the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection requested by the present application.

[0025] As Figures 1 to 7 :

[0026] A falsework support system for a special-shaped large-section ring-shaped prestressed concrete structure beam includes a load-bearing platform 1, columns 2, and column tie rods 3. There are multiple columns 2 which are connected by column tie rods 3 to form a framework. A load-bearing platform 1 is arranged on the top of the framework. The load-bearing platform 1 is used to temporarily bear the weight of the special-shaped large-section ring-shaped prestressed concrete structure beam and its formwork system; the column tie rods 3 are arranged horizontally or obliquely, so as to realize the horizontal connection and inclined strengthening connection between adjacent columns 1; the load-bearing platform 1 includes steel section keels arranged vertically and horizontally, and its bottom is fixedly connected to the vertical rods 1 through bolts; between the load-bearing platform 1 and the columns 2, and between the columns 2 and the column tie rods 3, they are connected by bolts.

[0027] As Figure 6 , Figure 7 :

[0028] In the falsework support system for the special-shaped large-section ring-shaped prestressed concrete structure beam described above, the column 1 is of a spliced type. Column connection flanges 4 are arranged at both ends of the column 1. Adjacent columns 1 are butt-jointed through the column connection flanges 4 and fixed connections are achieved by passing bolts through the column connection flanges 4.

[0029] In the falsework support for the special-shaped large-section ring-shaped prestressed concrete structure beam described above, the column tie rod 3 is of a spliced type. Tie rod connection flanges 5 are arranged at both ends of the column tie rod 3. The vertical rod tie rods 3 are bolted to each other through the column connection flanges 4 or bolted to the vertical rods.

[0030] As Figures 1 to 3 :

[0031] In the falsework support system of the special-shaped large cross-section circular prestressed concrete structural beam, the framework formed by the vertical poles 2 is arranged in a circular shape, and the load-bearing platform 1 set at its top is also arranged in a circular shape. The bottom of the framework is connected to the ground by bolts.

[0032] Such as Figure 1 , Figure 4 , in the falsework support system of the special-shaped large cross-section circular prestressed concrete structural beam, connecting bolts are embedded in the ground. The connecting bolts are used to connect with the vertical poles 2; the connecting bolts form column feet through secondary casting, and shock-absorbing pads are buried in the column feet.

[0033] The construction method of the above falsework support system for the special-shaped large cross-section circular prestressed concrete structural beam is as follows:

[0034] Step 1: Combine the layout of the ring beam and structural columns on site, and calculate and optimize the selection of falsework steel pipes and the overall arrangement of the falsework.

[0035] Step 2: Draw detailed drawings of the falsework system.

[0036] Step 3: Process single vertical pole steel pipes, connecting diagonal bars, and connecting cross bars (including welding at the connection ends) in the factory.

[0037] Step 4: Assemble a single falsework frame in the factory.

[0038] Step 5: Transport the single falsework frame to the site.

[0039] Step 6: Conduct on-site lofting and positioning of the vertical poles according to the falsework layout drawing.

[0040] Step 7: Install and reinforce the basic section of the single falsework frame.

[0041] Step 8: Connect the cross bars of the basic section of the single falsework frame.

[0042] Step 9: Install the intermediate section of the single falsework frame.

[0043] Step 10: Connect the cross bars of the intermediate section of the single falsework frame.

[0044] Step 11: Repeat Steps 9 - 10 to complete the installation of a single-piece falsework frame; gradually improve the connecting cross bars between single-piece falsework frames during the installation process of the single-piece falsework frame.

[0045] Step 12: Repeat the layout of Steps 6 - 11 to complete the installation of the single-section falsework structural system.

[0046] Step 13: Repeat Step 12 to complete the installation of the overall falsework structural system for the ring beam. At the same time, gradually improve the connecting cross bars between single sections of the falsework during the installation process of the single-section falsework.

[0047] Step 14: Complete the overall installation of the jig, and gradually complete the sectional acceptance during the process.

[0048] The above are only the embodiments provided by the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tire frame support system for a special-shaped large-section annular prestressed concrete structural beam, characterized by: It includes a load-bearing platform, columns and column connecting rods. There are multiple columns and they are connected by the column connecting rods to form a frame body. A load-bearing platform is arranged on the top of the frame body. The load-bearing platform is used to temporarily bear the weight of the special-shaped large-section annular prestressed concrete structural beam and its formwork system. The column connecting rods are arranged horizontally or obliquely to achieve horizontal connection and inclined reinforced connection between adjacent columns. The load-bearing platform includes steel keels arranged vertically and horizontally, and the bottom of the steel keel is fixedly connected to the column by bolts. The load-bearing platform and the column, and the column and the column connecting rod are connected by bolts.

2. The tire frame support system of the special-shaped large-section annular prestressed concrete structural beam according to claim 1 is characterized by: The columns are of a spliced ​​type, and column connecting flanges are arranged at both ends of the columns. Adjacent columns are butted together through the column connecting flanges and bolts are passed through the column connecting flanges to achieve fixed connection.

3. The tire frame support system of the special-shaped large-section annular prestressed concrete structural beam according to claim 1 is characterized by: The column tie rods are of a spliced ​​type, and tie rod connecting flanges are arranged at both ends of the column tie rods. The column tie rods are bolted to each other or to the column bolts through the column connecting flanges.

4. The tire frame support system of the special-shaped large-section annular prestressed concrete structural beam according to claim 1 or 3 is characterized in that: It also includes a connecting end, which is used for connecting upper and lower adjacent vertical poles or vertical poles and connecting rods of vertical poles on both sides. End flanges are arranged on the top, bottom and sides of the connecting end, and the end flanges are used to connect with the vertical pole connecting flanges or the tie rod connecting flanges through bolts.

5. The tire frame support system of the special-shaped large-section annular prestressed concrete structural beam according to claim 1 is characterized by: The frame body formed by the upright poles is arranged in a ring shape, and the load-bearing platform arranged on the top of the frame body is also arranged in a ring shape. The bottom of the frame body is connected to the ground through bolts.

6. The tire frame support system of the special-shaped large-section annular prestressed concrete structural beam according to claim 5 is characterized by: Connecting bolts are embedded in the ground, and the connecting bolts are used to connect with the vertical poles; the connecting bolts are cast twice to form column feet, and shock-absorbing pads are embedded in the column feet.

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