A bridge steel structure construction support

Abstract

This utility model relates to the field of bridge steel structure construction technology, specifically to a bridge steel structure construction support, comprising at least two sets of upper and lower assembled support column units, each set consisting of four support columns; a slot extending axially into the support column is opened in the center of a first flange welded to the top of the support column, and a second flange welded to the bottom of the support column vertically fixes a rod with an annular inner groove; during assembly, the rod of the upper support column is inserted into the slot of the lower support column to form a nested physical limit, and the inner groove structure interlocks with the inner wall of the slot to generate a multi-directional shear interface; the rod of the bottom support column is inserted into a pre-set hole in the concrete base to construct the foundation anchorage; this structure eliminates manual calibration deviation through forced alignment of the rod and the slot, and the annular inner groove enables the bending moment load to be distributed and transmitted in the nested interface, thereby ensuring precise alignment of the axes of the multi-layer support columns and significantly improving the bending stiffness of the nodes, ultimately achieving a dual breakthrough in efficient assembly and anti-overturning safety of the support.

Description

Technical Field

[0001] This utility model relates to the field of bridge steel structure construction technology, and in particular to a bridge steel structure construction support. Background Technology

[0002] ① Traditional bridge steel structure support systems generally adopt an integral welded frame structure. The construction process requires full-size steel cutting and welding in a factory according to the bridge height, forming a rigid, non-removable frame before transporting it to the construction site for hoisting. While this method ensures structural strength, the excessive dimensions of the welded supports frequently lead to height restrictions and difficulties in navigating curves during highway transport, especially in remote mountainous areas or densely populated urban areas. Its fundamental drawback lies in the fact that the massive volume and fixed form of the integrated structure severely restricts transportation efficiency and makes it difficult to adapt to the deployment needs of diverse construction environments.

[0003] ② To overcome transportation bottlenecks, the current mainstream improvement solution adopts a split structure design—disassembling the support system into independent columns and beams in the factory, transporting them separately to the site, and then reassembling them by bolting or welding. This technology avoids the traffic restrictions of large components by reducing the size of individual transported parts, and can complete the transfer of components using conventional trucks. Its core progress lies in replacing the overall handling with a modular disassembly strategy, sacrificing a small amount of on-site operation time to achieve a breakthrough in transportation feasibility.

[0004] ③ The on-site assembly process of split-type supports faces the risk of precision loss. The core problem lies in the lack of a mechanical forced alignment structure between independent components. During construction, the bolt hole positions are manually calibrated visually. Under dynamic loads or foundation settlement disturbances, this often leads to a gradual offset of millimeters to centimeters between the column and beam interfaces. In multi-layer assembly, the offset of the lower layer is forcibly transferred to the upper layer through the bolted connection, inducing a geometric increase in the overturning moment of the tower structure. More seriously, pure bolt joints generate asymmetric stress concentration under eccentric loading conditions, and the connection point reaches the yield strength prematurely, causing continuous instability and collapse. The essence of this defect is that the split structure lacks a passive guidance and bending coupling mechanism, which amplifies construction disturbances into systemic safety risks. Utility Model Content

[0005] The purpose of this utility model is to provide a bridge steel structure construction support, which solves the problem of centimeter-level displacement accumulation caused by the lack of a forced alignment structure during on-site assembly of split supports, as well as the risk of continuous instability and collapse caused by insufficient bending stiffness of bolted connection nodes under eccentric load conditions.

[0006] To achieve the above objectives, this utility model provides a bridge steel structure construction support, comprising at least two sets of vertically assembled support columns, each set consisting of four columns. A first flange is welded to the top of each support column, and a slot is formed in the center of each first flange, extending into the support column. A second flange is welded to the bottom of each support column, and a plug rod is welded to the bottom of each second flange. The plug rod has an inner groove on its radially outer side to form a reinforcing structure. The plug rod is inserted into the slot to complete the assembly of at least two sets of support columns, and after assembly, the plug rod at the bottom of the lower support column is inserted into a preset hole.

[0007] The first flange is provided with a plurality of first fixing holes spaced apart, and the second flange is provided with a plurality of second fixing holes spaced apart. Bolts are passed through the first fixing holes and the second fixing holes to fix at least two sets of support columns.

[0008] Wherein, a number of first diagonal bracing plates are welded and installed at the connection between the first flange and the support column to form a triangular support, and a number of second diagonal bracing plates are welded and installed at the connection between the second flange and the support column to form a triangular support.

[0009] The preset holes are respectively opened at the top of the concrete base. When the insertion rod is inserted into the preset hole, the second flange is in contact with the concrete base, and the support column is fixed to the concrete base by bolts passing through the second fixing hole.

[0010] Each of the support columns is connected by welding with an I-beam. At the upper and lower ends of the weld between the I-beam and the support column, a third diagonal brace is welded to form a triangular support.

[0011] After at least two sets of the support columns are assembled, a support plate is attached to the second flange at the top of the upper support column. The support plate has recessed grooves at its four corners and several third fixing holes in the recessed grooves.

[0012] The support plate and the support column are assembled by bolts passing through the third fixing hole and the second fixing hole, and the top of the support plate forms a support structure for bridge casting.

[0013] This utility model discloses a bridge steel structure construction support, which consists of four support columns forming a basic unit. Its core innovation lies in the collaborative mechanism of longitudinal assembly of the support columns. The flange welded to the top of each support column extends to form a deep slot structure, and the bottom surface of the flange welded to the bottom end is vertically fixed with a grooved insert rod. During implementation, the insert rod at the bottom of the upper support column is precisely inserted into the slot at the top of the lower support column. Axial self-locking is achieved by matching the slot depth with the insert rod length, and the groove structure makes the insert rod and the inner wall of the slot form a multi-directional interlocking interface. The insert rod of the bottom support column is inserted into a preset hole to complete the foundation anchoring, forming a continuous force chain transmission channel from bottom to top. This structure eliminates assembly misalignment through physical nesting, and at the same time, it uses the groove to expand the bending moment bearing contact surface, transforming the nodal bending force into distributed compressive and shear stress, ultimately achieving precise alignment of the support system and improved anti-overturning rigidity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a structural schematic diagram of the concrete base according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the support plate in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the support column in an embodiment of the present invention.

[0019] In the diagram: 101, support column; 102, first flange; 103, slot; 104, second flange; 105, insert rod; 106, inner groove; 107, pre-set hole; 108, first fixing hole; 109, second fixing hole; 110, first diagonal brace; 111, second diagonal brace; 112, concrete base; 113, I-beam; 114, third diagonal brace; 115, support plate; 116, inner groove; 117, third fixing hole. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 .

[0022] This utility model provides a bridge steel structure construction support. At the bridge steel structure construction site, a concrete base 112 is first poured, and pre-set holes 107 are precisely drilled on its top surface. A single set of bottom support columns 101 are vertically erected on the concrete base 112. The bottom surface of the second flange 104 welded to the bottom end of each support column 101 is tightly attached to the surface of the concrete base 112. Simultaneously, the insertion rod 105 at the bottom of the support column 101 is inserted into the pre-set holes 107 of the concrete base 112 for initial positioning. The radially outer periphery of the insertion rod 105 has an inner groove 106 structure that enhances its resistance to shear deformation. Subsequently, bolts are passed through the second fixing holes 109 on the second flange 104 and anchored to the concrete base 112, forming a rigid connection between the support column 101 and the foundation.

[0023] When continuing to install the upper support column 101, the insert rod 105 at the bottom of the upper single support column 101 is inserted downward into the center slot 103 of the first flange 102 at the top of the lower support column 101. The slot 103 extends into the interior of the lower support column 101 to increase the nesting depth. The inner groove 106 of the insert rod 105 fits tightly with the slot 103 to form a self-stabilizing structure, ensuring axial alignment of the upper and lower columns. The first flange 102 at the top of the lower support column 101 and the second flange 104 at the bottom of the upper support column 101 are locked together by bolts through the corresponding first fixing holes 108 and second fixing holes 109, forming a double bending resistance node. The first diagonal brace 110 welded to the connection between the first flange 102 and the support column 101, and the second diagonal brace 111 welded to the connection between the second flange 104 and the support column 101 respectively form triangular supports, distributing the load borne by the flange to the wall of the support column 101, significantly reducing the risk of stress concentration at the connection.

[0024] Four supporting columns 101 on the same floor are connected laterally by I-beams 113. The two ends of the I-beams 113 are welded and fixed to the supporting columns 101. The third diagonal bracing plates 114 added at the upper and lower ends of the welding points form a local triangular support structure, which enhances the node stiffness between the I-beams 113 and the supporting columns 101 and suppresses the lateral displacement of the support. After completing the longitudinal stacking and lateral connection of at least two sets of supporting columns 101 on the same floor, a support plate 115 is installed on the second flange 104 at the top of the uppermost supporting column 101. The recessed grooves 116 at the four corners of the support plate 115 accommodate the second flange 104 downwards, preventing the flange from protruding from the support surface. Bolts pass through the third fixing hole 117 opened in the recessed groove 116 of the support plate 115 and the first fixing hole 108 on the second flange 104 to fasten the support plate 115 to the top of the support, forming a flat bridge casting bearing surface.

[0025] The synergistic logic of each structure: the pre-set holes 107 in the concrete base 112 and the insert rods 105 work together to constrain the foundation displacement; the upper and lower support columns 101 achieve rapid centering through the nesting of the insert rods 105 and slots 103, and the flange bolt connection resists bending moment; the first diagonal brace plate 110 and the second diagonal brace plate 111 enhance the flange's resistance to deformation; the I-beam 113 and the third diagonal brace plate 114 form a horizontal anti-torsional frame; the recessed groove 116 in the support plate 115 maintains the flatness of the bearing surface; all components together form a layered force transmission path—the bridge load is transmitted to the flange through the support plate 115, distributed to the support columns 101 through bolts and insert structures, balanced by the lateral force through the I-beam 113 frame, and finally anchored to the concrete base 112 by the bottom insert rods 105, achieving stability control throughout the construction process.

[0026] Working principle: Before construction, a pre-drilled hole 107 corresponding to the position of the support column 101 is made at the top of the concrete base 112. The insert rod 105 at the bottom of the bottom support column 101 is vertically inserted into the pre-drilled hole 107, so that the flange at the bottom of the support column 101 is tightly fitted with the top surface of the concrete base 112. Then, the base is locked by bolts through the fixing holes on the flange, so that the support column 101 and the foundation are rigidly anchored. The inner groove 106 structure on the outside of the insert rod 105 enhances its bending and shear resistance, prevents deformation of the insertion part due to load, and ensures the stability of the initial installation. After the bottom support column 101 is positioned, the modular assembly stage begins: the insert rod 105 at the bottom of the upper support column 101 is aligned with the slot 103 at the top of the lower support column 101 and vertically inserted. The design of the slot 103 extending into the support column 101 increases the nesting depth. Combined with the reinforced structure of the groove 106 in the insert rod 105, this allows the upper and lower columns to form a self-aligning, tight insertion, preventing misalignment. Subsequently, the flange at the top of the lower support column 101 and the flange at the bottom of the upper support column 101 are locked together by bolts through corresponding fixing holes. This dual connection mechanism (insertion + bolts) significantly improves the node's resistance to lateral displacement. The diagonal bracing plate welded to the connection between the flange and the support column 101 further forms a triangular support, distributing the force on the flange to the column and suppressing stress concentration at the connection point. Lateral coordination of the same-layer support columns 101 is achieved through I-beams 113: multiple I-beams 113 are horizontally welded between adjacent support columns 101 to form a frame network. Diagonal bracing plates are added to both the upper and lower ends of the welding points of support column 101 to form local triangular supports, which greatly enhances the lateral stiffness and torsional resistance, preventing the overall overturning caused by the instability of a single column. Finally, the flange at the top of the top support column 101 is connected to the support plate 115. The recessed grooves 116 at the four corners of the support plate 115 accommodate the flange. Bolts pass through the fixing holes of the support plate 115 and the flange to complete the locking. The top of the support plate 115 forms a flat working platform, and its recessed grooves 116 design avoids the bolts protruding and affecting the construction surface. The load transfer logic of the entire support follows a layered collaborative path: the bridge construction load is transferred to the top flange through the support plate 115, and then distributed to the support column 101 through the bolts and slots 103; the longitudinal load is transferred downwards layer by layer along the plug-in structure. The nested fit between the insert rod 105 and the slot 103, along with the flange bolts, resists bending moment. The lateral load is borne by the I-beam 113 frame, and the diagonal bracing continuously suppresses node deformation. The bottom support column 101 ultimately anchors the composite load to the concrete base 112 through the insert rod 105, achieving a closed-loop rigid force chain throughout the entire process. In the overall structure, the nested design of the insert rod 105 and the slot 103, combined with the flange bolt fixing, achieves rapid positioning and high-strength connection, improving assembly and disassembly efficiency. The triangular support network formed by multiple diagonal bracing plates significantly reduces the peak stress at the nodes and extends fatigue life. The modular plug-in architecture allows for flexible addition or reduction of the number of support columns 101 according to engineering needs, while the grooved insert rod 105 and deep slot 103 structure ensures the maintenance of accuracy after repeated assembly and disassembly.The recessed groove 116 in the support plate 115, in synergy with the I-beam 113 frame, optimizes the integrity of the working plane and the overall resistance to instability, ultimately forming a safe, reliable, and highly adaptable bridge construction support system.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A bridge steel structure construction support frame comprising at least two sets of support columns (101) assembled in an upper and lower set, characterized in that: Each set of support columns (101) consists of four columns. Each support column (101) has a first flange (102) welded to its top. The first flange (102) has a slot (103) in its center that extends into the support column (101). Each support column (101) has a second flange (104) welded to its bottom. The second flange (104) has a plug rod (105) welded to its bottom. The plug rod (105) has an inner groove (106) on its radial outer side to form a reinforcing structure. The plug rod (105) is inserted into the slot (103) to complete the assembly of at least two sets of support columns (101). After assembly, the plug rod (105) at the bottom of the lower support column (101) is inserted into the preset hole (107).

2. A bridge steel construction support according to claim 1, characterized in that: The first flange (102) is provided with a plurality of first fixing holes (108) spaced apart, and the second flange (104) is provided with second fixing holes (109) spaced apart. At least two sets of support columns (101) are fixed by bolts passing through the first fixing holes (108) and the second fixing holes (109).

3. A bridge steel construction support according to claim 2, characterized in that: A number of first diagonal bracing plates (110) are welded and installed at the connection between the first flange (102) and the support column (101) to form a triangular support. A number of second diagonal bracing plates (111) are welded and installed at the connection between the second flange (104) and the support column (101) to form a triangular support.

4. A bridge steel construction support according to claim 2, characterized in that: The preset holes (107) are respectively opened at the top of the concrete base (112). When the insert rod (105) is inserted into the preset hole (107), the second flange (104) fits against the concrete base (112), and the support column (101) is fixed to the concrete base (112) by bolts passing through the second fixing hole (109).

5. A bridge steel construction support according to claim 2, characterized in that: Each of the support columns (101) is connected by welding with an I-beam (113), and the upper and lower ends of the weld between the I-beam (113) and the support column (101) are respectively welded with a third diagonal brace (114) to form a triangular support.

6. A bridge steel structure construction support as described in claim 5, characterized in that: After at least two sets of the support columns (101) are assembled, a support plate (115) is attached to the second flange (104) at the top of the upper support column (101). The support plate (115) has recessed grooves (116) at its four corners, and a plurality of third fixing holes (117) are formed in the recessed grooves (116).

7. A bridge steel construction support according to claim 6, characterized in that: The support plate (115) and the support column (101) are assembled by bolts passing through the third fixing hole (117) and the first fixing hole (108), and the top of the support plate (115) forms a support structure for bridge casting.

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