Foldable-line-assembled concrete beam pouring assembly type support and construction method thereof

Abstract

The application relates to a foldable-line assembled concrete beam pouring assembly type support and a construction method thereof, the support comprising a prefabricated base, a stand column, connecting ear plates and a transverse connecting framework, the stand column being arranged on the prefabricated base, the stand column being provided with the connecting ear plates, the connecting ear plates being oppositely arranged in two groups, the included angle of the connecting ear plates in the same group being certain, the included angles between the two groups of the connecting ear plates being in a multiple relationship, the included angle between the outermost two connecting ear plates in the two groups of the connecting ear plates being 180 DEG, and the stand columns being foldable-line assembled through the connecting ear plates and the transverse connecting framework. Compared with the prior art, the application realizes foldable-line standardized assembly and reduces the number of the ear plates.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering construction technology, and relates to a prefabricated support for concrete beam casting that can be assembled by folding lines and its construction method. Background Technology

[0002] Cast-in-place concrete beam bridges are a common type of bridge structure, and scaffolding is an essential temporary structure during the construction of cast-in-place concrete beam bridges. Adopting a reasonable scaffolding structure is one of the key issues in completing the cast-in-place construction of concrete beam bridges at low cost and high efficiency. Existing cast-in-place beam bridge steel pipe scaffolding has a low degree of prefabrication, requiring a large amount of on-site welding work, resulting in low construction efficiency. Furthermore, prefabricated steel pipe scaffolding is generally only suitable for linear assembly and not for zigzag assembly.

[0003] Patent CN109252445A provides a fully prefabricated steel pipe support system. Four steel pipes are arranged in a square to form a support group. By improving the angle of the ear plates, the ear plates on the columns can simultaneously accommodate the assembly connection between horizontal, diagonal, and lateral connecting rods and the columns. Both the steel pipe columns and connecting rods are prefabricated and connected using high-strength bolts. In existing technologies, the connecting ear plates of prefabricated supports are mostly set at a 90° angle, resulting in steel pipe supports that can only be assembled in a straight line or in a rectangular shape with four columns, failing to meet the requirements for assembly along zigzag lines with different angles. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one of the defects of the existing technology, such as the inability to perform zigzag assembly of steel pipe supports for cast-in-place concrete construction and the low degree of standardized assembly, and to provide a zigzag-assembly prefabricated support for cast-in-place concrete beams and its construction method. This invention achieves zigzag-standardized assembly and reduces the number of ear plates.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] One of the technical solutions of the present invention is to provide a prefabricated support for concrete beam casting that can be assembled in a zigzag pattern. The support includes a prefabricated base, columns, connecting lugs, and a cross bracing frame. The columns are set on the prefabricated base, and the columns are provided with connecting lugs. Two sets of connecting lugs are arranged opposite each other. The included angle of the connecting lugs in the same set is fixed, and the included angles of the two sets of connecting lugs are in a multiple relationship. The included angle between the two outermost connecting lugs in the two sets of connecting lugs is 180°. The columns are assembled in a zigzag pattern through the connecting lugs and the cross bracing frame.

[0007] As a preferred technical solution, a connecting steel plate is pre-embedded in the prefabricated base, and the prefabricated base is connected to the lowest column segment through the connecting steel plate.

[0008] As a preferred technical solution, the prefabricated base is pre-embedded with connecting steel plates and bolts, and the prefabricated base is connected to the lowest standard column section through the connecting steel plates and bolts.

[0009] As a preferred technical solution, the connecting ear plate includes an ear plate body, on which an ear plate connecting hole is provided.

[0010] As a preferred technical solution, the connecting ear plate and the transverse frame are connected by bolts.

[0011] As a preferred technical solution, several sets of connecting ear plates are set on the column according to a certain modular angle rule to meet the connection between two adjacent columns. After a set of columns is assembled according to the zigzag line, the horizontal connecting frame and the connecting ear plates can still be connected by bolts to realize the zigzag assembly of the prefabricated bracket.

[0012] Furthermore, the column includes a standard column section, an adjusting column section, and a connecting column section. The standard column section is set as the standard height section of the column, the adjusting column section is set as the height adjustment section of the column, and the connecting column section is provided with connecting lugs at both ends. Each column section is provided with connecting flanges at both ends, and the column sections are connected to each other through connecting flanges.

[0013] As a preferred technical solution, the connecting flange includes a flange body and a flange stiffening plate. The flange body has a flange connection hole, and the flange stiffening plate is provided between the flange body and the column segment.

[0014] As a preferred technical solution, the connecting flanges are connected by bolts.

[0015] As a preferred technical solution, the precast base is made of precast concrete, the column is made of Q235 or Q355 steel pipe, the connecting lug is made of Q355 or higher grade steel plate, the cross bracing frame is a fixed truss made of Q235 steel pipe, and the connecting flange is made of steel plate of the same grade as the steel pipe column.

[0016] One of the technical solutions of the present invention is to provide a method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, the method comprising the following steps:

[0017] When the bracket's broken line is constructed with angle a as the reference module, an arbitrary polar coordinate x-axis is selected, and a set of m connecting ear plates p1, p2, p3, ..., pm are arranged with the coordinate axis x according to the angles a, 2a, 3a, ..., ma.

[0018] Another set of n connecting lugs q1, q2, q3, ..., qn are arranged with the coordinate axis x at angles of 180°+ma, 180°+2ma, 180°+3ma, ..., 180°+nma.

[0019] The two sets of connecting ear plates pi and qj (i≤m, j≤n) form an angle matrix with an included angle between (180°+a-nma)-180° and an interval of a. The included angle matrix satisfies the condition of a broken line assembly with a folded angle between (180°+a-nma)-180° and a modulus of a.

[0020] Furthermore, the method includes the following steps:

[0021] When the broken line of the bracket is constructed with angle a as the reference module, the polar coordinate x-axis is arbitrarily selected, and a set of m=3 connecting ear plates p1, p2, p3 are arranged with the coordinate axis x at angles a, 2a, 3a. Taking advantage of the characteristic that the smallest prime numbers 2 and 3 form a continuous changing module with 1, the angles between the connecting ear plates are avoided, and the utilization efficiency of the connecting ear plates is maximized.

[0022] Another set of n connecting lugs q1, q2, q3, ..., qn are arranged with the coordinate axis x at angles of 180°+3a, 180°+6a, 180°+9a, ..., 180°+3na.

[0023] The two sets of connecting ear plates pi and qj (i≤m=3,j≤n) form an angle matrix with an included angle between (180°+a-3na)-180° and an interval of a. The included angle matrix satisfies the condition of a broken line assembly with a folded angle between (180°+a-3na)-180° and a modulus of a.

[0024] Furthermore, the calculation method for the number n of opposing connecting lugs includes the following steps:

[0025] When the required line angle is between b and 180°, n is the smallest integer solution to the formula 180° + a - nma ≤ b.

[0026] Furthermore, the calculation method for the number n of opposing connecting lugs includes the following steps:

[0027] When the required line angle is between b and 180°, n is the smallest integer solution to the formula 180° + a - 3na ≤ b.

[0028] Furthermore, the included angle matrix is ​​as follows:

[0029]

[0030] Furthermore, the included angle matrix is ​​as follows:

[0031]

[0032] Furthermore, when assembling along a zigzag line according to the 180°-(jm-i)a angle, the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the zigzag angle position are selected to connect the columns on both sides, thereby realizing the zigzag line assembly of the 180°-(jm-i)a angle.

[0033] Furthermore, when assembling along a zigzag line according to the 180°-(3j-i)a fold angle, the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the 180°-(3j-i)a position are selected to connect the columns on both sides, thereby realizing the zigzag line assembly of the 180°-(3j-i)a fold angle.

[0034] To further improve the standardization and versatility of prefabricated steel pipe supports, this invention constructs a prefabricated concrete beam casting support that can be assembled along a zigzag line, and proposes a corresponding construction method. This method enables the support columns to be assembled along a zigzag line at different angles, thereby improving the versatility and turnover efficiency of the support.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) This invention achieves full assembly of the support by setting standardized sections; by using modular components to connect the ear plates, a series of angled assemblies that can adapt to a specified angle a as the reference module are constructed, which solves the folded line assembly requirements of the prefabricated support and is especially suitable for use in the cast-in-place construction process of concrete beams;

[0037] (2) In the process of constructing ear plates at different angles, it is easy to think of constructing the ear plates according to the method of symmetrical distribution of adjacent included angles, but it is not easy to construct them according to certain mathematical rules. The present invention solves the problem of the zigzag fully assembled erection of steel pipe supports for concrete beam pouring construction by constructing the method of multiples of mn. It has a high degree of standardization, flexible construction, high turnover efficiency, and good versatility. It can construct a general support structure system with any reference module and variation range according to production needs and usage plans. Compared with the method of stacking and arranging ear plates, it reduces the number of ear plates and the amount of materials used, while reducing the impact of welding ear plates to the column on the strength of the column pipe.

[0038] (3) The present invention uses a construction method based on multiples of 3n, which can meet the maximum angle requirements with the fewest ear plates. Compared with stacking ear plates, the number of ear plates is reduced by more than 60% while meeting the same angle requirements. The two smallest prime numbers 2 and 3 form a continuous variable modulus with 1. By using the method of increasing by multiples of 1, 2 and 3, the matrix construction is controlled. There are no repeated angles in the matrix, and the utilization efficiency is the highest. Attached Figure Description

[0039] Figure 1This is a schematic diagram of the elevation structure of the prefabricated support for casting concrete beams that can be assembled by folding lines, as described in an embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram of the structure at the end of the column connecting joint in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram illustrating the construction of the connecting ear plate angle when m, n, and a all take arbitrary values ​​in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram illustrating the construction of the connecting ear plate angle when m takes 3, n, and a all take arbitrary values ​​in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram illustrating the construction of the connecting ear plate angle when m is 3, n is 4, and a is 10° in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram showing the range of the folded angle of the bracket assembly when m is 3, n is 4, and a is 10° in an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the planar structure of the bracket after being assembled along the fold lines in an embodiment of the present invention.

[0046] Explanation of markings in the diagram:

[0047] 1—Prefabricated base, 2—Standard column section, 3—Column adjusting section, 4—Column connecting section, 5—Connecting ear plate, 6—Horizontal bracing frame, 7—Connecting flange;

[0048] 5-1—Ear plate body, 5-2—Ear plate connection hole, 7-1—Flange connection hole, 7-2—Flange stiffening plate. Detailed Implementation

[0049] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and do not imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Example:

[0053] A modular support system for casting concrete beams that can be assembled along a folding line, such as... Figure 1 As shown, the system includes a prefabricated base 1, columns, connecting lugs 5, and a cross-bracing frame 6. The columns are mounted on the prefabricated base 1. In this embodiment, connecting steel plates and bolts are pre-embedded in the prefabricated base 1. The prefabricated base 1 is connected to the lowest column segment, i.e., the standard column segment 2, through the connecting steel plates and bolts. Connecting lugs 5 are provided on the columns. Two sets of connecting lugs 5 are arranged opposite each other. The included angle of the connecting lugs 5 in the same set is fixed. The included angles of the two sets of connecting lugs 5 are multiples of each other. The included angle between the two outermost connecting lugs 5 in the two sets of connecting lugs 5 is 180°. The columns are assembled in a zigzag pattern through the connecting lugs 5 and the cross-bracing frame 6. In this embodiment, the connecting lugs 5 and the cross-bracing frame 6 are connected by bolts.

[0054] On the column, i.e. the upper and lower ends of the column connecting section 4 are set with several sets of connecting ear plates 5 according to a certain modular angle law to meet the connection between two adjacent columns. After a set of columns are assembled according to the fold line, the horizontal frame 6 and the connecting ear plate 5 can still be connected by bolts to realize the fold line assembly of the prefabricated bracket.

[0055] The column includes a standard column section 2, an adjusting column section 3, and a connecting column section 4. The standard column section 2 is set as the standard height section of the column, the adjusting column section 3 is set as the height adjustment section of the column, and the upper and lower ends of the connecting column section 4 are provided with connecting lugs 5. The upper and lower ends of each column section are provided with connecting flanges 7. The column sections are connected by connecting flanges 7. In this embodiment, the connecting flanges 7 are connected by bolts.

[0056] like Figure 2 As shown, the connecting ear plate 5 includes an ear plate body 5-1, and an ear plate connecting hole 5-2 is provided on the ear plate body 5-1;

[0057] The connecting flange 7 includes a flange body and a flange stiffening plate 7-2. The flange body has a flange connection hole 7-1, and the flange stiffening plate 7-2 is provided between the flange body and the column segment.

[0058] In this embodiment, the precast base 1 is made of precast concrete, the column is made of Q235 steel pipe, the connecting ear plate 5 is made of Q355 steel plate, the horizontal frame 6 is a fixed truss made of Q235 steel pipe, and the connecting flange 7 is made of steel plate of the same grade as the steel pipe column.

[0059] The specific steps for constructing the above-mentioned prefabricated support structure for pouring concrete beams that can be assembled along a folded line are as follows:

[0060] like Figure 3 As shown, when constructing the bracket according to the required broken line with angle a as the reference module, arbitrarily select the polar coordinate x-axis, and arrange a set of m connecting ear plates p1, p2, p3, ..., pm with the coordinate axis x according to the angles a, 2a, 3a, ..., ma;

[0061] When the required zigzag angle is between b and 180°, calculate the number of opposing connecting lugs n, where n is the smallest integer solution of the formula 180°+a-nma≤b. After obtaining n, arrange another set of connecting lugs q1, q2, q3, ..., qn with the coordinate axis x at angles of 180°+ma, 180°+2ma, 180°+3ma, ..., 180°+nma.

[0062] The two sets of connecting lugs pi and qj (i≤m, j≤n) form an angle matrix with an angle between (180°+a-nma)-180° and an interval of a. The specific angle matrix is ​​as follows:

[0063]

[0064] The included angle matrix can satisfy the folded line assembly with a modulus of a, where the folded angle is between (180°+a-nma)-180°.

[0065] When it is necessary to assemble along a zigzag line according to the 180°-(jm-i)a angle, select the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the zigzag angle position to connect the columns on both sides, and the zigzag line assembly of the 180°-(jm-i)a angle can be achieved.

[0066] Preferably, such as Figure 4 As shown, taking the construction of the bracket based on the angle a as the reference module according to the broken line of the required bracket as an example, arbitrarily select the polar coordinate x-axis, and arrange a set of m=3 connecting ear plates p1, p2, p3 with the coordinate axis x at angles a, 2a, 3a. By taking advantage of the characteristic that the smallest prime numbers 2 and 3 form a continuous changing module with 1, the angles between the connecting ear plates are avoided, and the utilization efficiency of the connecting ear plates is maximized.

[0067] Taking the required broken line angle range between b and 180° as an example, calculate the number of opposing connecting lugs n, where n is the smallest integer solution of the formula 180°+a-3na≤b. After obtaining n, arrange another set of connecting lugs q1, q2, q3, ..., qn with the coordinate axis x at angles of 180°+3a, 180°+6a, 180°+9a, ..., 180°+3na.

[0068] The two sets of connecting lugs pi and qj (i≤m=3, j≤n) form an angle matrix with an angle between (180°+a-3na)-180° and an interval of a. The specific angle matrix is ​​as follows:

[0069]

[0070] The included angle matrix can satisfy the folded line assembly with a modulus of a, where the folded angle is between (180°+a-3na) and 180°.

[0071] When it is necessary to assemble along a zigzag line according to the 180°-(3j-i)a angle, select the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the zigzag angle position to connect the columns on both sides, and the zigzag line assembly of the 180°-(3j-i)a angle can be achieved.

[0072] In this embodiment, as Figure 5 As shown, taking the construction of the bracket based on the angle a = 10° as the reference module according to the broken line of the required bracket, arbitrarily select the polar coordinate x-axis, and arrange a set of m = 3 connecting ear plates p1, p2, p3 with the coordinate axis x at the angles a = 10°, 2a = 20°, and 3a = 30°.

[0073] Taking the required zigzag angle range of 70-180° as an example, calculate the number of opposing connecting lugs n, where n is the smallest integer solution of the formula 180°+a-3na≤b=70°. After obtaining n=4, arrange another set of connecting lugs q1, q2, q3, q4 with the coordinate axis x at the angles of 180°+3a=210°, 180°+6a=240°, 180°+9a=270°, and 180°+12a=300°.

[0074] The two sets of connecting lugs pi and qj form an angle matrix with an angle between 70° and 180° and an interval of 10°, as shown in the following figure:

[0075]

[0076] The included angle matrix can accommodate zigzag assembly with fold angles between 70-180° and a module of 10°.

[0077] like Figure 6 As shown, when it is necessary to assemble along a zigzag line according to the 180°-(3j-i)a=160° angle, select the connecting ear plates p1 and q1 corresponding to the position of the 180°-(3j-i)a=160° position and connect the columns on both sides to achieve the zigzag line assembly with the 160° angle.

[0078] When it is necessary to assemble along a zigzag line according to the zigzag angle 180°-(3j-i)a=140°, select the connecting ear plates p2 and q2 corresponding to the position of the zigzag angle 180°-(3j-i)a=140° in the 2nd column and 2nd row to connect the columns on both sides, and the zigzag line assembly with the 140° zigzag angle can be achieved.

[0079] The above-mentioned method of using prefabricated supports for casting concrete beams that can be assembled by bending lines is as follows: Figure 7 As shown, the specific steps are as follows:

[0080] After assembling the four columns with zigzag lines at included angles b1 = 160° and b2 = 140°, the first column is connected to the connecting lug p2, the second column is connected to the connecting lugs p1 and q1, the third column is connected to the connecting lugs p2 and q2, and the fourth column is connected to the connecting lug q2.

[0081] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for constructing a prefabricated support frame for casting concrete beams that can be assembled along a folded line, characterized in that, The support includes a prefabricated base (1), columns, connecting ear plates (5) and a cross-bracing frame (6). The columns are set on the prefabricated base (1), and the columns are provided with connecting ear plates (5). Two sets of connecting ear plates (5) are arranged opposite each other. The included angle of the connecting ear plates (5) in the same set is fixed. The included angles of the two sets of connecting ear plates (5) are multiples of each other. The included angle between the two outermost connecting ear plates (5) in the two sets of connecting ear plates (5) is 180°. The columns are assembled by connecting ear plates (5) and cross-bracing frame (6). The method includes the following steps: When the bracket's broken line is constructed with angle a as the reference module, an arbitrary polar coordinate x-axis is selected, and a set of m connecting ear plates p1, p2, p3, ..., pm are arranged with the coordinate axis x according to the angles a, 2a, 3a, ..., ma. Another set of n connecting lugs q1, q2, q3, ..., qn are arranged with the coordinate axis x at angles of 180°+ma, 180°+2ma, 180°+3ma, ..., 180°+nma. The two sets of connecting ear plates pi and qj form an angle matrix with an included angle between (180°+a-nma)-180° and an interval of a. The included angle matrix satisfies the condition of a broken line assembly with a fold angle between (180°+a-nma)-180° and a module of a. The calculation method for the number n of opposing connecting lugs includes the following steps: When the required line angle is between b and 180°, n is the smallest integer solution to the formula 180° + a - nma ≤ b.

2. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 1, is characterized in that... The column includes a standard column section (2), an adjusting column section (3), and a connecting column section (4). The standard column section (2) is set as the standard height section of the column, the adjusting column section (3) is set as the height adjustment section of the column, and the connecting column section (4) is provided with connecting lugs (5) at both ends. Each column section is provided with connecting flanges (7) at both ends, and the column sections are connected to each other through connecting flanges (7).

3. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 1, is characterized in that... The method includes the following steps: When the bracket is constructed with angle a as the reference module, the polar coordinate x-axis is arbitrarily selected, and a set of m=3 connecting ear plates p1, p2, p3 are arranged with the coordinate axis x at angles a, 2a, 3a. Another set of n connecting lugs q1, q2, q3, ..., qn are arranged with the coordinate axis x at angles of 180°+3a, 180°+6a, 180°+9a, ..., 180°+3na. The two sets of connecting ear plates pi and qj form an angle matrix with an included angle between (180°+a-3na) and 180° and an interval of a. The included angle matrix satisfies the condition of a broken line assembly with a fold angle between (180°+a-3na) and 180° and a module of a.

4. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 3, is characterized in that... The calculation method for the number n of opposing connecting lugs includes the following steps: When the required line angle is between b and 180°, n is the smallest integer solution to the formula 180° + a - 3na ≤ b.

5. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 1, is characterized in that... The included angle matrix is ​​as follows: 。 6. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 3, is characterized in that... The included angle matrix is ​​as follows: 。 7. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 1, is characterized in that... When assembling along a zigzag line according to the 180°-(jm-i)a fold angle, select the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the 180°-(jm-i)a position to connect the columns on both sides, thus achieving the zigzag line assembly of the 180°-(jm-i)a fold angle.

8. The method for constructing a prefabricated support for casting concrete beams that can be assembled along a folded line, as described in claim 3, is characterized in that... When assembling along a zigzag line according to the 180°-(3j-i)a fold angle, select the connecting ear plates pi and qj corresponding to the i-th column and j-th row of the 180°-(3j-i)a position to connect the columns on both sides, thus achieving the zigzag line assembly of the 180°-(3j-i)a fold angle.

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