A super-long-span bridge steel structure laminated beam and its construction method

Abstract

The present invention discloses a long-span bridge steel structure stacked beam and a construction method thereof. The construction method comprises: constructing bridge piers; constructing supporting steel columns on the bridge piers; welding multiple layers of steel structure stacked beams to the supporting steel columns; hoisting and welding the bottom layer of steel structure stacked beams to the supporting steel columns; and sequentially hoisting and welding the steel structure stacked beams above the bottom layer to the upper layer of steel structure stacked beams, wherein each layer of steel structure stacked beams is formed by welding multiple transverse steel beams and multiple longitudinal steel beams; and welding bridge deck beams to the topmost layer of steel structure stacked beams to form the long-span bridge steel structure stacked beam. The present invention has the advantages of high construction efficiency, good structural stability, long service life, and convenient construction.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a stacked beam of a large-span bridge steel structure and a construction method thereof. Background Art

[0002] In bridge engineering, long-span bridges often have the functions of crossing obstacles and beautifying the landscape at the same time. Bridges with a structure of vertical and horizontal stacked beams in the shape of antique bracket sets are often favored due to their reasonable stress-bearing performance and beautiful shape. However, due to their complex structural form and characteristics, they bring great difficulties to design and construction. To this end, a wooden bracket set stacked beam bridge is provided in the art, which has the disadvantages that the wooden stacked beams have a short service life, low structural strength, and are easily weathered, corroded, and damaged. In addition, due to the limitations of wood and construction technology, the horizontal and vertical beams cannot be effectively spliced during the construction of the wooden stacked beams, resulting in the horizontal and vertical beams being too short in length and the stacked beam embedding depth being too small, thereby affecting the structural span. At the same time, the wooden stacked beam nodes cannot be prefabricated and assembled on site, which has the disadvantage of low construction efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a long-span bridge steel structure stacked beam and a construction method thereof to solve the problems of low construction efficiency, poor structural stability, limited span and inability to splice prefabricated components in traditional stacked beams.

[0004] In order to solve the above technical problems, the present invention provides a technical solution: a construction method for a stacked beam of a long-span bridge steel structure, comprising:

[0005] Construction of bridge piers;

[0006] Construction of supporting steel columns on bridge piers;

[0007] Welding multiple layers of steel structure stacked beams on the supporting steel columns, hoisting and welding the bottom layer of steel structure stacked beams on the supporting steel columns, and sequentially hoisting and welding the steel structure stacked beams above the bottom layer on the upper layer of steel structure stacked beams. Each layer of steel structure stacked beams is formed by welding multiple transverse steel beams and multiple longitudinal steel beams;

[0008] The bridge deck beams are welded to the top layer of steel structure stacked beams to form a long-span bridge steel structure stacked beams.

[0009] Furthermore, the present invention provides a method for constructing steel structure stacked beams for large-span bridges, wherein the multi-layer steel structure stacked beams are more than two layers, including lower-layer steel structure stacked beams and upper-layer steel structure stacked beams formed by welding multiple transverse steel beams located above and multiple longitudinal steel beams located below, and the transverse length and longitudinal length of the upper-layer steel structure stacked beams are both greater than those of the lower-layer steel structure stacked beams.

[0010] Furthermore, the construction method of the steel structure stacked beams of a large-span bridge provided by the present invention comprises welding temporary diagonal braces on the supporting steel columns before welding the bottom layer of steel structure stacked beams; and supporting the first layer of steel structure stacked beams on the temporary diagonal braces after the first layer of steel structure stacked beams are welded on the supporting steel columns.

[0011] Furthermore, in the construction method of the steel structure stacked beams of a long-span bridge provided by the present invention, the transverse steel beams and the longitudinal steel beams in each layer of the steel structure stacked beams are embedded and welded.

[0012] Furthermore, the present invention provides a construction method for the stacked beams of a large-span bridge steel structure, in which the upper surface of each transverse steel beam and each longitudinal steel beam in each layer of the steel structure stacked beams is provided with a plurality of grooves of equal spacing and height, the longitudinal steel beams being located at the bottom and the transverse steel beams being located at the top, the lower surfaces of the transverse steel beams in each layer being embedded and welded to the grooves of the longitudinal steel beams in the current layer, exposing the grooves on the transverse steel beams; the grooves on the transverse steel beams in the current layer are embedded and welded to the lower surfaces of the longitudinal steel beams of the upper layer of steel structure stacked beams, and the grooves of the transverse steel beams in the topmost layer are embedded and welded to the longitudinally distributed bridge deck beams.

[0013] Furthermore, in the construction method of the stacked beams of the large-span bridge steel structure provided by the present invention, the transverse steel beams and the longitudinal steel beams are both square steel tubes, the grooves are provided on the square steel tubes, and stiffening plates are welded in the grooves.

[0014] In order to solve the above technical problems, another technical solution provided by the present invention is: a stacked beam of a long-span bridge steel structure, comprising:

[0015] bridge piers;

[0016] Supporting steel columns are set vertically on the piers;

[0017] Multi-layer steel structure stacked beams are welded to the supporting steel columns.

[0018] The present invention provides a long-span bridge steel structure stop beam and its construction method. Multiple layers of steel structure stop beams are welded to bridge piers via supporting steel columns. Each layer of the steel structure stop beams is hoisted from bottom to top using a hoisting device. The bottom layer of steel structure stop beams is welded to the supporting steel columns. The steel structure stop beams above the bottom layer are sequentially hoisted and welded to the upper layer of steel structure stop beams. A bridge deck beam is welded to the topmost layer of steel structure stop beams to form a long-span bridge steel structure stop beam. Compared to traditional wooden structure stop beams, the construction method of the present invention allows each layer of steel structure stop beams to be hoisted and welded as a whole, thereby improving the construction efficiency of long-span bridge steel structure stop beams. The present invention can improve the structural stability of long-span bridge steel structure stop beams, making them less susceptible to weathering, corrosion, and breakage, and thus increasing their service life. Each layer of steel structure stop beams of the present invention can be welded on the ground or in a loose environment, eliminating the need to weld transverse and longitudinal steel beams one by one at high altitude to form multiple layers of steel structure stop beams, thus improving construction convenience.

[0019] The long-span bridge steel structure stacked beam and the construction method thereof provided by the present invention can solve the problems of low construction efficiency, poor structural stability, limited span and inability to splice prefabricated components of traditional stacked beams through multi-layer steel structure stacked beams.

[0020] In order to solve the above technical problems, the present invention provides another technical solution: a construction method for a stacked beam of a long-span bridge steel structure, comprising:

[0021] Construction of bridge piers;

[0022] Construction of supporting steel columns on bridge piers;

[0023] A tire frame is set up below the stacked beam of the steel structure of the long-span bridge to be constructed;

[0024] A multi-layer steel structure stacked beam is formed by assembling and welding six components extending in the four horizontal and vertical directions with the supporting steel column as the center. The six components include a first straight square steel tube component to a fourth straight square steel tube component with increasing lengths, and a first cross-shaped square steel tube component and a second cross-shaped square steel tube component. The first cross-shaped square steel tube component includes a transverse steel tube located above and a longitudinal steel tube located below, and the second cross-shaped square steel tube component includes a longitudinal steel tube located above and a transverse steel tube located below.

[0025] Furthermore, the present invention provides a method for constructing a long-span bridge steel structure stacked beam, wherein the step of forming a multi-layer steel structure stacked beam by splicing and welding six components comprises:

[0026] Definition: From bottom to top, a layer of longitudinal steel beams and the adjacent layer of transverse steel beams on the same horizontal plane are defined as a layer of steel structure stacked beams. The horizontal plane where the longitudinal sections of the longitudinal steel beams and transverse steel beams in the middle of each layer of steel structure stacked beams are located is divided into plane 1 and plane 2 from bottom to top.

[0027] S1: On the supporting steel column, a first linear square steel tube assembly and a second linear square steel tube assembly are welded on the transverse outer side and the inner side of the second plane of the first layer steel structure stoplog respectively; on the supporting steel column, a first linear square steel tube assembly is welded on the longitudinal two side surfaces of the first plane of the second layer steel structure stoplog respectively;

[0028] S2: On the supporting steel column, the second linear square steel tube assembly is welded to the two transverse side surfaces of the second plane of the third layer of steel structure stop beam; on the supporting steel column, the first linear square steel tube assembly is welded to the two longitudinal side surfaces of the first plane of the fourth layer of steel structure stop beam; and this process is repeated until the second linear square steel tube assembly is welded to the two transverse side surfaces of the second plane of the nth layer of steel structure stop beam, and the first linear square steel tube assembly is welded to the two longitudinal side surfaces of the first plane of the n+1th layer of steel structure stop beam, where n is the number of designed stop beam layers;

[0029] S3: except for the first straight square steel tube assembly on the transverse outer side of the first layer of steel structure stoplog and the two first straight square steel tube assemblies in the longitudinal direction of one plane of the (n+1) layer of steel structure stoplog, first cross-shaped square steel tube assemblies are welded to the interfaces of the remaining first straight square steel tube assemblies and the second straight square steel tube assemblies;

[0030] S4: Welding a second cross-shaped square steel tube assembly to the interface of the first cross-shaped square steel tube assembly;

[0031] S5: Welding the first cross-shaped square steel tube assembly to the interface of the second cross-shaped square steel tube assembly;

[0032] S6: Repeat steps S4 and S5 until the nth layer of steel structure beams;

[0033] S7: Weld a fourth straight square steel tube assembly to the longitudinal interface of the second cross-shaped square steel tube assembly on the first plane of the n+1-th layer of steel structure stacked beam; weld a third straight square steel tube assembly to the transverse outer interface of the first cross-shaped square steel tube assembly on the transverse outermost side of the second plane of the n-th layer of steel structure stacked beam; in this way, a multi-layer steel structure stacked beam is formed.

[0034] Furthermore, the present invention provides a method for constructing a stacked beam of a large-span bridge steel structure, wherein the first cross-shaped square steel tube assembly comprises a vertically spaced and intersecting longitudinal tube bottom plate located below and a transverse tube bottom plate located above, wherein the longitudinal tube bottom plate and the transverse tube bottom plate are welded via a connecting door plate, and a connecting door plate is welded to the transverse tube bottom plate symmetrically distributed on the connecting door plate, and connecting side plates are welded on both sides of the connecting door plate and the connecting door plate, and the lower ends of the connecting side plates are welded to the longitudinal tube bottom plate; the longitudinal tubes located on both sides of the transverse tube bottom plate are welded to the longitudinal tube bottom plate. The longitudinal tube section 1 side panels and the longitudinal tube section 2 side panels are welded to both sides of the bottom plate in the width direction respectively; the transverse tube section 1 side panels and the transverse tube section 2 side panels are welded to both sides of the transverse tube bottom plate on the width direction respectively; the longitudinal tube section 1 top panel is welded on the two longitudinal tube section 1 side panels and the connecting side panels on one side thereof; the longitudinal tube section 2 top panel is welded on the two longitudinal tube section 2 side panels and the connecting side panels on one side thereof; the transverse tube section 1 side panels, the two transverse tube section 2 side panels, the two connecting side panels and the connecting two door panels are welded with the transverse tube top panel.

[0035] In order to solve the above technical problems, the present invention provides another technical solution: a long-span bridge steel structure stacked beam, comprising:

[0036] bridge piers;

[0037] Supporting steel columns are set vertically on the piers;

[0038] Multi-layer steel structure stacked beams are welded to the supporting steel columns.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention provides a method for constructing steel-structured stacked beams for long-span bridges. Multiple layers of steel-structured stacked beams are welded to bridge piers via supporting steel columns. The multiple layers of steel-structured stacked beams are assembled and welded from six components. The forces acting on the multiple layers of steel-structured stacked beams are transmitted to the piers via the supporting steel columns, thereby improving the overall load-bearing performance of the bridge. Compared with wooden stacked beams, this method improves structural stability and service life. The six components are compact and easily transported. Welding and splicing multiple layers of steel-structured stacked beams using these six components can address the problems of low construction efficiency, poor structural stability, limited spans, and the inability to splice prefabricated components associated with traditional stacked beams.

[0041] The construction method of the steel structure stacked beam of a long-span bridge provided by the present invention can be embedded and welded compared with the wood structure stacked beam, while the wood structure stacked beam cannot achieve a large stacked beam embedding depth due to material characteristics.

[0042] The invention provides a construction method for a steel structure laminated beam of a long-span bridge. Ribbing and reinforcement are used to enable the steel structure laminated beam to transmit axial force and bending moment, thereby improving the structural strength and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 1. It is a schematic diagram of the middle structure of the vertical elevation of the steel structure stacked beam of the long-span bridge of Example 1;

[0044] Figures 2 to 5 This is a three-dimensional schematic diagram of the construction of a four-story steel structure stacked beam in Example 1;

[0045] Figure 6 is Figure 5 3D schematic diagram of the construction of the bridge deck beam on the middle four-story steel structure stacked beam;

[0046] Figures 7 to 12 is a schematic structural diagram of six components of Example 2;

[0047] Figures 13 to 17 This is a three-dimensional schematic diagram of welding multi-layer steel structure stacked beams using six components in Example 2;

[0048] Figure 18 is a cross-sectional schematic diagram of a multi-layer steel structure stop beam of Example 2;

[0049] Figures 19 to 20 This is a schematic diagram of the exploded structure of the first cross-shaped square steel tube assembly of Example 2;

[0050] Figure 21 3D schematic diagram of the second cross-shaped square steel tube assembly of Example 2;

[0051] Figure 22 It is a three-dimensional schematic diagram of the construction of a bridge using stacked beams of a long-span steel bridge structure;

[0052] As shown in the figure:

[0053] 100. Laminated beams of long-span bridge steel structures;

[0054] 110. Bridge pier;

[0055] 120. Supporting steel columns;

[0056] 130. Temporary diagonal bracing;

[0057] 140. Multi-layer steel structure stop beam, 141. First layer steel structure stop beam, 142. Second layer steel structure stop beam, 143. Third layer steel structure stop beam, 144. Fourth layer steel structure stop beam, 145. Fifth layer steel structure stop beam;

[0058] 150. Bridge deck beam;

[0059] 160, longitudinal steel beam;

[0060] 170, transverse steel beam;

[0061] 180, groove;

[0062] 191. Longitudinal steel pipe, 1911. Longitudinal pipe bottom plate, 1912. Longitudinal pipe first section side plate, 1913. Longitudinal pipe second section side plate, 1914. Longitudinal pipe first section top plate, 1915. Longitudinal pipe second section top plate, 192. Transverse steel pipe, 1921. Transverse pipe bottom plate, 1922. Transverse pipe first section side plate, 1923. Transverse pipe second section side plate, 1924. Transverse pipe top plate, 1931. Connecting door panel one, 1932. Connecting door panels two, 1933. Connecting side panels. DETAILED DESCRIPTION

[0063] The present invention will be described in detail below with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are all in a very simplified form and are not accurately scaled, and are only used to facilitate and clearly illustrate the embodiments of the present invention.

[0064] Example 1

[0065] Please refer to Figures 1 to 6 The first embodiment of the present invention provides a construction method of a long-span bridge steel structure stacked beam 100, which may include:

[0066] Step 210 , constructing the bridge pier 110 .

[0067] Step 220 : constructing support steel columns 120 on the bridge pier 110 .

[0068] In step 230, a multi-layer steel structure stacked beam 140 is welded to the supporting steel column 120. The bottom layer of the multi-layer steel structure stacked beam 140 is hoisted and welded to the supporting steel column 120. The steel structure stacked beams above the bottom layer are hoisted and welded to the upper layer of steel structure stacked beams in sequence. Each layer of steel structure stacked beams is formed by welding multiple transverse steel beams 170 and multiple longitudinal steel beams 160.

[0069] Step 240 , welding the bridge deck beam 150 onto the topmost steel structure stacked beam to form the long-span bridge steel structure stacked beam 100 .

[0070] The construction method of the steel structure stacked beam 100 for a large-span bridge provided in the first embodiment of the present invention is for more than two layers, including a lower layer of steel structure stacked beams and an upper layer of steel structure stacked beams formed by welding multiple transverse steel beams 170 located above and multiple longitudinal steel beams 160 located below, and the transverse length and longitudinal length of the upper layer of steel structure stacked beams are both greater than those of the lower layer of steel structure stacked beams.

[0071] Please refer to Figures 1 to 6 In the construction method of the long-span bridge steel structure stacked beam 100 provided in the first embodiment of the present invention, the multi-layer steel structure stacked beam 140 can be four layers.

[0072] Step 231, please refer to Figure 2 A first layer of steel structure stacked beams 141 is formed by welding a plurality of first transverse steel beams 170 and a plurality of first longitudinal steel beams 160 , and the first layer of steel structure stacked beams 141 is hoisted and welded to the supporting steel columns 120 .

[0073] Step 232, please refer to Figure 3 A second layer of steel structure stacked beams 142 is formed by welding multiple second transverse steel beams 170 and multiple second longitudinal steel beams 160, and the second layer of steel structure stacked beams 142 is hoisted and welded to the first layer of steel structure stacked beams 141. The length of the second transverse steel beams 170 is greater than the length of the first transverse steel beams 170, and the length of the second longitudinal steel beams 160 is greater than the length of the first longitudinal steel beams 160.

[0074] Step 233, please refer to Figure 4 A third layer of steel structure stacked beams 143 is formed by welding multiple third transverse steel beams 170 and multiple third longitudinal steel beams 160, and the third layer of steel structure stacked beams 143 is hoisted and welded to the second layer of steel structure stacked beams 142. The length of the third transverse steel beam 170 is greater than the length of the second transverse steel beam 170, and the length of the third longitudinal steel beam 160 is greater than the length of the second longitudinal steel beam 160.

[0075] Step 234, please refer to Figure 5 A fourth layer of steel structure stacked beams 144 is formed by welding multiple fourth transverse steel beams 170 and multiple fourth longitudinal steel beams 160, and the fourth layer of steel structure stacked beams 144 are hoisted and welded to the third layer of steel structure stacked beams 143. The length of the fourth transverse steel beam 170 is greater than the length of the third transverse steel beam 170, and the length of the fourth longitudinal steel beam 160 is greater than the length of the third longitudinal steel beam 160.

[0076] Each layer of steel structure stacked beams can be prefabricated in the factory to improve the efficiency of lifting and welding.

[0077] Please refer to Figure 1 To improve the stability of the multi-layer steel structure stoplog 140 welded to the support steel columns 120, the construction method of the long-span bridge steel structure stoplog 100 provided in the first embodiment of the present invention includes welding temporary diagonal braces 130 to the support steel columns 120 before welding the bottom layer of steel structure stoplog. After the first layer of steel structure stoplog 141 is welded to the support steel columns 120, the first layer of steel structure stoplog 141 is supported on the temporary diagonal braces 130. The temporary diagonal braces 130 on both sides can improve the stability of the multi-layer steel structure stoplog 140 welded to the support steel columns 120.

[0078] Please refer to Figures 2 to 5In order to improve the structural stability of each layer of steel structure stacked beams, the construction method of the steel structure stacked beam 100 for a long-span bridge provided in the first embodiment of the present invention is that the transverse steel beams 170 and the longitudinal steel beams 160 in each layer of the steel structure stacked beams are embedded and welded. Specifically, the upper surface of each transverse steel beam 170 and each longitudinal steel beam 160 in each layer of the steel structure stacked beams is downwardly provided with a plurality of grooves 180 of equal spacing and equal height, the longitudinal steel beams 160 are located at the bottom, and the transverse steel beams 170 are located at the top. The lower surface of the transverse steel beams 170 of each layer is embedded and welded on the grooves 180 of the longitudinal steel beams 160 of the current layer, exposing the grooves 180 on the transverse steel beams 170; the grooves 180 on the transverse steel beams 170 of the current layer are embedded and welded with the lower surface of the longitudinal steel beams 160 of the steel structure stacked beams of the previous layer, and the grooves 180 of the transverse steel beams 170 of the top layer are embedded and welded with the longitudinally distributed bridge deck beams 150.

[0079] In order to achieve embedded welding, the construction method of the large-span bridge steel structure stacked beam 100 provided in Example 1 of the present invention is that the transverse steel beam 170 and the longitudinal steel beam 160 can both be square steel tubes, the groove 180 is arranged on the square steel tube, and a stiffening plate is welded in the groove 180.

[0080] Please refer to Figure 1 The first embodiment of the present invention further provides a long-span bridge steel structure stacked beam 100, comprising:

[0081] The bridge piers 110 can be set at both ends or in the middle of the width direction of the obstacle such as a river, lake, or canyon.

[0082] The supporting steel column 120 is vertically arranged on the bridge pier 110 and can be pre-buried or post-buried on the bridge pier 110.

[0083] The multi-layer steel structure stop beam 140 is welded to the support steel column 120. The multi-layer steel structure stop beam 140 includes but is not limited to four layers.

[0084] Please refer to Figures 1 to 6The first embodiment of the present invention provides a long-span bridge steel structure stoplog 100 and its construction method. Multiple layers of steel structure stoplog 140 are welded to a pier 110 via supporting steel columns 120. Each layer of the multiple layers of steel structure stoplog 140 is hoisted from bottom to top using hoisting equipment. The bottom layer of steel structure stoplog is welded to the supporting steel columns 120. Steel structure stoplogs above the bottom layer are sequentially hoisted and welded to the next layer of steel structure stoplog. Finally, a bridge deck beam 150 is welded to the topmost layer of steel structure stoplog to form the long-span bridge steel structure stoplog 100. Compared to traditional wooden stoplogs, the construction method of the present invention allows each layer of steel structure stoplog to be hoisted and welded as a whole, thereby improving the construction efficiency of the long-span bridge steel structure stoplog 100. The first embodiment of the present invention can improve the structural stability of the long-span bridge steel structure stoplog 100, making it less susceptible to weathering, corrosion, and damage, and thus increasing the service life of the stoplog. In the first embodiment of the present invention, each layer of steel structure stacked beams can be welded on the ground or in a loose environment, without the need to weld the transverse steel beams 170 and the longitudinal steel beams 160 one by one at high altitude to form a multi-layer steel structure stacked beam 140, which is convenient for construction.

[0085] Example 2

[0086] Please refer to Figures 7 to 21 The second embodiment of the present invention further provides a construction method of a long-span bridge steel structure stacked beam 100, which may include:

[0087] Step 310, please refer to Figure 18 , construction of bridge pier 110.

[0088] Step 320, please refer to Figure 13 and Figure 18 , a support steel column 120 is constructed on the pier 110. The support steel column 120 can be a square steel tube.

[0089] In step 330 , a cradle (not shown) is arranged below the stacked beam 100 of the long-span bridge steel structure to be constructed.

[0090] Step 340, please refer to Figures 7 to 18 A multi-layer steel structure stacked beam 140 is formed by assembling and welding six components extending in the four horizontal and vertical directions with the supporting steel column 120 as the center. The six components include a first straight square steel tube component B1 to a fourth straight square steel tube component B4 with increasing lengths, and a first cross-shaped square steel tube component A11 and a second cross-shaped square steel tube component A12. The first cross-shaped square steel tube component A11 and the second cross-shaped square steel tube component A12 both include embedded welded transverse steel tubes 192 and longitudinal steel tubes 191. The longitudinal steel tube 191 of the first cross-shaped square steel tube component A11 is located at the bottom; the longitudinal steel tube 191 of the second cross-shaped square steel tube component A12 is located at the top.

[0091] Please refer to Figures 7 to 18 The construction method of the long-span bridge steel structure stacked beam 100 provided in the first embodiment of the present invention is as follows: Figures 7 to 12 The steps of splicing and welding the six components to form the multi-layer steel structure stoplog 140 may include:

[0092] Definition: From bottom to top, a layer of longitudinal steel beams and the adjacent layer of transverse steel beams on the same horizontal plane are defined as a layer of stacked beams. Each layer of stacked beams is numbered incrementally, such as "First Layer Steel Structure Stacked Beams," "Second Layer Steel Structure Stacked Beams," "Third Layer Steel Structure Stacked Beams," and so on. The horizontal planes containing the central longitudinal sections of the longitudinal and transverse steel beams of each layer of stacked beams are divided into planes 1 and 2, respectively. When describing construction, you can use "First Layer Steel Structure Stacked Beams Plane 1," "First Layer Steel Structure Stacked Beams Plane 2," "Second Layer Steel Structure Stacked Beams Plane 1," "Second Layer Steel Structure Stacked Beams Plane 2," and so on.

[0093] S341: Please refer to Figure 13 On the supporting steel column 120, the first straight square steel tube assembly B1 and the second straight square steel tube assembly B2 are welded on the outer and inner sides of the two horizontal planes of the first layer steel structure stacked beam respectively; on the supporting steel column 120, the first straight square steel tube assembly B1 is welded on the two longitudinal side surfaces of the one plane of the second layer steel structure stacked beam respectively.

[0094] S342: Please refer to Figure 13 On the supporting steel column 120, the second straight square steel tube assembly B2 is welded on the two horizontal side surfaces of the second plane of the third-layer steel structure stacked beam; on the supporting steel column 120, the first straight square steel tube assembly B1 is welded on the two longitudinal side surfaces of the first plane of the fourth-layer steel structure stacked beam; on the supporting steel column 120, the second straight square steel tube assembly B2 is welded on the two horizontal side surfaces of the second plane of the fifth-layer steel structure stacked beam; on the supporting steel column 120, the first straight square steel tube assembly B1 is welded on the two longitudinal side surfaces of the first plane of the sixth-layer stacked beam.

[0095] S343: Please refer to Figure 14 , except for the first straight square steel tube assembly B1 on the transverse outer side of the first layer steel structure stop beam and the two first straight square steel tube assemblies B1 in the longitudinal direction of one plane of the sixth layer steel structure stop beam, the first cross-shaped square steel tube assembly A1 is welded at the interfaces of the remaining first straight square steel tube assemblies B1 and the second straight square steel tube assembly B2;

[0096] S344: Please refer to Figure 15 , welding the second cross-shaped square steel tube assembly A2 to the interface of the first cross-shaped square steel tube assembly A1;

[0097] S345: Please refer to Figure 16, welding the first cross-shaped square steel tube assembly A1 to the interface of the second cross-shaped square steel tube assembly A2;

[0098] S346: Repeat S4 and S5 until the fifth layer of steel structure beams;

[0099] S347: Please refer to Figure 17 A fourth straight square steel tube assembly B4 is welded to the longitudinal interface of the second cross-shaped square steel tube assembly A2 on the first plane of the sixth-layer steel structure stacked beam; a third straight square steel tube assembly B3 is welded to the transverse outer interface of the first cross-shaped square steel tube assembly A1 on the second plane of the fifth-layer steel structure stacked beam; in this way, a multi-layer steel structure stacked beam 140 is formed.

[0100] Please refer to Figures 19 to 21 In order to improve the rigidity of the first cross-shaped square steel tube assembly A1, the construction method of the long-span bridge steel structure stacked beam provided in the second embodiment of the present invention is as follows: the first cross-shaped square steel tube assembly A1 includes a vertically spaced and crossed longitudinal tube bottom plate 1911 located at the bottom and a transverse tube bottom plate 1921 located at the top, the longitudinal tube bottom plate 1911 and the transverse tube bottom plate 1921 are welded by a connecting door plate 1931, and a connecting second door plate 1932 is welded on the transverse tube bottom plate 1921 symmetrically distributed on the connecting door plate 1931. Connecting side plates 1933 are welded on both sides of the connecting door plate 1931 and the connecting second door plate 1932, and the lower ends of the connecting side plates 1933 are welded to the longitudinal tube bottom plate 1911; the longitudinal tube bottom plate 1911 and the transverse tube bottom plate 1921 are welded on both sides of the transverse tube bottom plate 1921. The longitudinal tube bottom plate 1911 is welded with longitudinal tube section 1 side plates 1912 and longitudinal tube section 2 side plates 1913 on both sides in the width direction, and the transverse tube bottom plate 1921 located on both sides of the longitudinal tube bottom plate 1911 is welded with transverse tube section 1 side plates 1922 and transverse tube section 2 side plates 1923 on both sides in the width direction, the longitudinal tube section 1 top plate 1914 is welded on the two longitudinal tube section 1 side plates 1912 and the connecting side plates 1933 on one side, the longitudinal tube section 2 top plate 1915 is welded on the two longitudinal tube section 2 side plates 1913 and the connecting side plates 1933 on one side, and the transverse tube section 1 top plate 1924 is welded on the two transverse tube section 1 side plates 1922, the two transverse tube section 2 side plates 1923, the two connecting side plates 1933 and the connecting second door plate 1932.

[0101] The longitudinal tube bottom plate 1911, two longitudinal tube section one side plates 1912, two longitudinal tube section two side plates 1913, longitudinal tube section one top plate 1914 and longitudinal tube section two top plate 1915 constitute the longitudinal steel tube 191; the transverse tube bottom plate 1921, two transverse tube section one side plates 1922, two transverse tube section two side plates 1923 and transverse tube top plate 1924 constitute the transverse steel tube 192; the connecting door panel 1931, connecting door panel 2 1932 and connecting side plate 1933 constitute the connecting plate.

[0102] The first door panel 1931 and the second door panel 1932 each include a horizontal door panel and side door panels welded to both sides of the horizontal door panel. The first door panel 1931 and the second door panel 1932 are symmetrically distributed on both sides of the horizontal tube bottom plate 1921.

[0103] In order to further improve the rigidity of the first cross-shaped square steel tube assembly A1, the upper end surfaces of the longitudinal tube section 1 side plate 1912 and the longitudinal tube section 2 side plate 1913 are higher than the transverse tube bottom plate 1921, the longitudinal tube section 1 side plate 1912 is welded to the transverse tube section 1 side plate 1922 and the transverse tube section 2 side plate 1923 on the corresponding side, and the longitudinal tube section 2 side plate 1913 is welded to the transverse tube section 1 side plate 1922 and the transverse tube section 2 side plate 1923 on the corresponding side, so that the transverse steel tube 192 and the longitudinal steel tube 191 form an embedded relationship through the connecting plate 193, thereby improving the rigidity of the transverse steel tube 192 and the longitudinal steel tube 191 at the node.

[0104] The second cross-shaped square steel tube assembly A2 has the same structure as the first cross-shaped square steel tube assembly A1, except that the first cross-shaped square steel tube assembly A1 is horizontally flipped to form the second cross-shaped square steel tube assembly A2.

[0105] Please refer to Figure 18 The second embodiment of the present invention further provides a long-span bridge steel structure stacked beam 100, comprising:

[0106] The bridge piers 110 can be set at both ends or in the middle of the width direction of the obstacle such as a river, lake, or canyon.

[0107] The supporting steel column 120 is vertically arranged on the bridge pier 110 and can be pre-buried or post-buried on the bridge pier 110.

[0108] The multi-layer steel structure stop beam 140 is welded to the support steel column 120. The multi-layer steel structure stop beam 140 includes but is not limited to five layers.

[0109] The second embodiment of the present invention provides a construction method for a long-span bridge steel lapped beam 100. In this method, multi-layer steel lapped beams 140 are welded to a pier 110 via supporting steel columns 120. The multi-layer steel lapped beams 140 are assembled and welded together from six components. The forces acting on the multi-layer steel lapped beams 140 are transmitted to the pier 110 via the supporting steel columns 120, thereby improving the overall load-bearing performance of the bridge. Compared to wooden lapped beams, this method improves structural stability and service life. The six components are compact and easy to transport. Compared to the first embodiment, this method is more suitable for use in limited environments where hoisting a full layer of steel lapped beams is not feasible.

[0110] The construction method of the long-span bridge steel structure stacked beam 100 provided in the second embodiment of the present invention can be embedded and welded compared to the wooden structure stacked beam, while the wooden structure stacked beam cannot achieve a large stacked beam embedding depth due to material properties.

[0111] The construction method of the long-span bridge steel structure laminated beam 100 provided in the second embodiment of the present invention can enable the steel structure laminated beam to transmit axial force and bending moment through node welding, rib addition, and reinforcement, thereby improving the structural strength and stability.

[0112] The above-described embodiment of the present invention provides a construction method for long-span bridge steel structure stacked beams 100. The steel structure stacked beams transfer load in the following manner: the top stacked beams bear the uniformly distributed load from the bridge deck, while the stacked beams below them can be simplified into supports. The reaction forces of the supports continue to transfer the load to the lower stacked beams, and this process continues until the load is transferred to the supporting steel columns 120 and bridge piers 110. This method effectively transmits force and stably supports the bridge deck superstructure. Furthermore, the long-span bridge steel structure stacked beams 100 can significantly reduce material usage and lower costs.

[0113] The above-described embodiment of the present invention provides a method for constructing a long-span steel bridge lapped beam 100. Unlike conventional steel structures, the longitudinal and transverse lapped beam connections of the steel structure lapped beam 100 utilize a spatially overlapping connection, eliminating the need for continuous load transfer at the same location. This optimizes the stress state within the lapped beam plane and effectively distributes the load at the lapped beam nodes. Furthermore, unlike conventional bridges, the lapped beams have a certain amount of space between them, facilitating the hoisting and welding of large prefabricated bridges.

[0114] Please refer to Figure 22 The long-span bridge formed by the construction method of the long-span bridge steel structure stacked beam 100 provided by the above embodiment of the present invention can serve as the main load-bearing structure on the one hand, and can also play a decorative and beautiful effect on the other hand, realizing an antique decorative shape.

[0115] The present invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only some embodiments of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention described, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A construction method for a long-span bridge steel structure stacked beam, characterized in that: include: Construction of bridge piers; Construction of supporting steel columns on bridge piers; A tire frame is set up below the stacked beam of the steel structure of the long-span bridge to be constructed; A multi-layer steel structure stacked beam is formed by assembling and welding six components extending in the horizontal and vertical directions with the supporting steel column as the center. The six components include a first straight square steel tube component to a fourth straight square steel tube component with increasing lengths, a first cross-shaped square steel tube component and a second cross-shaped square steel tube component. The first cross-shaped square steel tube component includes a transverse steel tube located at the top and a longitudinal steel tube located at the bottom, and the second cross-shaped square steel tube component includes a longitudinal steel tube located at the top and a transverse steel tube located at the bottom. The step of forming the multi-layer steel structure stacked beam by splicing and welding the six components includes: Definition: From bottom to top, a layer of longitudinal steel beams and the adjacent layer of transverse steel beams on the same horizontal plane are defined as a layer of steel structure stacked beams. The horizontal plane where the longitudinal sections of the longitudinal steel beams and transverse steel beams in the middle of each layer of steel structure stacked beams are located is divided into plane 1 and plane 2 from bottom to top. S1: On the supporting steel column, a first linear square steel tube assembly and a second linear square steel tube assembly are welded on the transverse outer side and the inner side of the second plane of the first layer steel structure stoplog respectively; on the supporting steel column, a first linear square steel tube assembly is welded on the longitudinal two side surfaces of the first plane of the second layer steel structure stoplog respectively; S2: On the supporting steel column, the second linear square steel tube assembly is welded to the two transverse side surfaces of the second plane of the third layer of steel structure stop beam; on the supporting steel column, the first linear square steel tube assembly is welded to the two longitudinal side surfaces of the first plane of the fourth layer of steel structure stop beam; and this process is repeated until the second linear square steel tube assembly is welded to the two transverse side surfaces of the second plane of the nth layer of steel structure stop beam, and the first linear square steel tube assembly is welded to the two longitudinal side surfaces of the first plane of the n+1th layer of steel structure stop beam, where n is the number of designed stop beam layers; S3: except for the first straight square steel tube assembly on the transverse outer side of the first layer of steel structure stoplog and the two first straight square steel tube assemblies in the longitudinal direction of one plane of the (n+1) layer of steel structure stoplog, first cross-shaped square steel tube assemblies are welded to the interfaces of the remaining first straight square steel tube assemblies and the second straight square steel tube assemblies; S4: Welding a second cross-shaped square steel tube assembly to the interface of the first cross-shaped square steel tube assembly; S5: Welding the first cross-shaped square steel tube assembly to the interface of the second cross-shaped square steel tube assembly; S6: Repeat steps S4 and S5 until the nth layer of steel structure beams; S7: Weld a fourth straight square steel tube assembly to the longitudinal interface of the second cross-shaped square steel tube assembly on the first plane of the n+1-th layer of steel structure stacked beam; weld a third straight square steel tube assembly to the transverse outer interface of the first cross-shaped square steel tube assembly on the transverse outermost side of the second plane of the n-th layer of steel structure stacked beam; in this way, a multi-layer steel structure stacked beam is formed.

2. The method for constructing a long-span bridge steel structure stacked beam according to claim 1, characterized in that: The first cross-shaped square steel tube assembly includes a vertically spaced and intersecting longitudinal tube bottom plate at the bottom and a horizontal tube bottom plate at the top. The longitudinal tube bottom plate and the horizontal tube bottom plate are welded by connecting a door plate. The horizontal tube bottom plate symmetrically distributed on the connecting door plate is welded with a connecting door plate. The connecting door plate and the connecting door plate are welded on both sides with connecting side plates. The lower end of the connecting side plate is welded to the longitudinal tube bottom plate. The longitudinal tube bottom plates on both sides of the horizontal tube bottom plate are welded on both sides of the width direction. The longitudinal tube section one side plate and the longitudinal tube section two side plate are connected, and the transverse tube section one side plate and the transverse tube section two side plates are welded on both sides of the width direction of the transverse tube bottom plate on both sides of the longitudinal tube bottom plate respectively. The longitudinal tube section one top plate is welded on the two longitudinal tube section one side plates and the connecting side plates on one side thereof, and the longitudinal tube section two top plate is welded on the two longitudinal tube section two side plates and the connecting side plates on one side thereof. The transverse tube top plate is welded on the two transverse tube section one side plates, the two transverse tube section two side plates, the two connecting side plates and the connecting two door plates.

3. A long-span bridge steel structure lapped beam obtained by the construction method of the long-span bridge steel structure lapped beam according to claim 1, characterized in that: include: bridge piers; Supporting steel columns are set vertically on the piers; Multi-layer steel structure stacked beams are welded to the supporting steel columns.

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