A construction method for hinged steel bridge pier

Abstract

A construction method for an articulated steel bridge pier relates to the field of bridge construction. The construction method for the articulated steel bridge pier comprises the following steps: after calculating the optimal segment length, the steel bridge pier is divided into an upper segment and a lower segment and manufactured separately, and the upper segment and the bridge deck steel beam are manufactured as a whole in the factory and transported to the site, and the manufactured lower segment is first hoisted on the lower foundation pre-constructed on the site, and then the upper segment and the bridge deck steel beam are hoisted as a whole and welded and fixed; a steel bridge pier ear plate is provided on the top of the upper segment, and the bridge deck steel beam is provided with bridge deck steel beam ear plates located on both sides of the steel bridge pier ear plate, and the upper segment and the bridge deck steel beam are hinged by a pin shaft passing through the bridge deck steel beam ear plate and the steel bridge pier ear plate, and a graphite copper sleeve with an outer circle and an inner ellipse cross section is installed in the circular ear plate hole of the steel bridge pier ear plate. The construction method for the articulated steel bridge pier solves the problem of precision control of positioning and connection coordination between various structures.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular, to a construction method for an articulated steel bridge pier. Background Art

[0002] Steel bridge piers are gradually being applied to actual bridge projects due to their advantages such as green and environmentally friendly construction methods, relatively fast construction speed, and superior earthquake resistance. The connection method between steel bridge piers and steel structure bridges has become a major factor affecting construction efficiency, earthquake resistance, and project quality. Since steel bridge piers and steel structure bridges are hinged by pins, the precision control requirements for the manufacture and erection of steel bridge piers are high, and the manufacturing is difficult. If the manufacturing error exceeds the allowable range, the steel bridge piers and steel structure bridges will not be connected normally, and the stress state of the steel bridge piers will be changed, affecting the structural safety. The current existing construction methods are difficult to ensure the normal installation and use of the manufactured steel bridge piers. Summary of the invention

[0003] The purpose of the present application is to provide a construction method for hinged steel bridge piers, which solves the problem of precision control of positioning and connection coordination between various structures, thereby ensuring rapid positioning and hinge connection between steel bridge piers and steel beams of bridge deck system.

[0004] The embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a construction method for an articulated steel pier, which includes the following steps: after calculating the optimal segment length, the steel pier is divided into an upper segment hinged to a steel beam of a bridge deck system at the top and a lower segment connected to the upper segment at the top, and the upper segment and the steel beam of the bridge deck system are manufactured as a whole in a factory and transported to a site, and at the site, the manufactured lower segment is first hoisted on a lower foundation pre-constructed on site, and then the upper segment and the steel beam of the bridge deck system are hoisted as a whole and welded and fixed; a steel pier ear plate is provided on the top of the upper segment, and the steel beam of the bridge deck system is provided with steel beam ear plates of the bridge deck system located on both sides of the steel pier ear plate, and the upper segment and the steel beam of the bridge deck system are hinged by a pin shaft passing through the steel beam ear plate of the bridge deck system and the steel pier ear plate, and a graphite copper sleeve with a cross-section of an outer circle and an inner ellipse is installed in the circular ear plate hole of the steel pier ear plate.

[0006] In some optional implementation schemes, when the steel pier ear plates are manufactured, the steel pier ear plates are first assembled according to the process flow and then the ear plate holes are machined. First, the cutting size of the steel pier ear plate openings is controlled, and the machining allowance of the openings is reserved according to the estimated maximum assembly error value. After the upper segment is assembled, the steel pier ear plate openings are machined. The positioning, verticality and distance H1 from the center of the opening to the top plate of the upper segment of the steel pier ear plate openings are controlled through machining, and finally a graphite copper sleeve is installed in the ear plate hole.

[0007] In some optional implementation schemes, when manufacturing the ear plates of the bridge deck steel beams, the ear plate holes are first machined. When the openings of the ear plates of the bridge deck steel beams meet the tolerance requirements, they are installed to the bottom plate of the bridge deck steel beams. The distance H2 from the center of the openings of the ear plates of the bridge deck steel beams to the bottom plate of the bridge deck steel beams is controlled. The preliminary positioning is completed and the plates are spot welded and fixed. The process axis is inserted into the two ear plates of the bridge deck steel beams to adjust the concentricity of the openings. A reinforcing process plate for resisting welding deformation is arranged between the two ear plates of the bridge deck steel beams. Finally, the ear plates of the bridge deck steel beams are welded to the bottom plate of the bridge deck steel beams. After welding is completed, the process axis and the reinforcing process plate are withdrawn.

[0008] In some optional implementation schemes, when manufacturing the upper segment, the maximum error value is estimated by taking into account the errors in the lower foundation manufacturing and erection process, and a manufacturing allowance corresponding to the maximum error value is added to the bottom of the upper segment to adjust the elevation of the steel pier after erection.

[0009] In some optional embodiments, the cross-section of the graphite copper sleeve is an outer circle and an inner ellipse with the major axis arranged horizontally.

[0010] The beneficial effect of the present application is that the construction method of the hinged steel bridge pier provided by the present application comprises the following steps: after calculating the optimal segment length, the steel bridge pier is divided into an upper segment hinged to the bridge deck steel beam at the top and a lower segment connected to the upper segment at the top, and the upper segment and the bridge deck steel beam are manufactured as a whole in the factory and transported to the site, at which the manufactured lower segment is first hoisted on the lower foundation pre-constructed on site, and then the upper segment and the bridge deck steel beam are hoisted as a whole and welded and fixed; a steel bridge pier ear plate is provided on the top of the upper segment, and the bridge deck steel beam is provided with bridge deck steel beam ear plates respectively located on both sides of the steel bridge pier ear plate, the upper segment and the bridge deck steel beam are hinged by a pin shaft passing through the bridge deck steel beam ear plate and the steel bridge pier ear plate, and a graphite copper sleeve with an outer circle and an inner ellipse cross-section is installed in the circular ear plate hole of the steel bridge pier ear plate. The construction method of the articulated steel bridge pier provided in the present application solves the problem of precision control of positioning and connection coordination between various structures, thereby ensuring rapid positioning and articulation between the steel bridge pier and the steel beams of the bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of the structure of the hinged steel bridge pier and the bridge deck steel beam provided in the embodiment of the present application;

[0013] Figure 2 For along Figure 1 Section view of the AA section line;

[0014] Figure 3 A schematic diagram of the processing structure of the upper segment of the hinged steel pier provided in an embodiment of the present application;

[0015] Figure 4 A schematic diagram of the structure of a graphite copper sleeve for an articulated steel bridge pier provided in an embodiment of the present application;

[0016] Figure 5 A schematic diagram of the structure of a steel beam of a bridge deck provided in an embodiment of the present application;

[0017] Figure 6 A schematic diagram of the processing structure of the bridge deck steel beam provided in the embodiment of the present application;

[0018] Figure 7 A schematic diagram of the structure in which the upper and middle sections of the hinged steel piers provided in an embodiment of the present application are hinged to the steel beams of the bridge deck.

[0019] In the figure: 100, steel beam of bridge deck; 110, ear plate of steel beam of bridge deck; 120, pin shaft; 130, process shaft; 140, strengthening process plate; 150, ear plate of steel beam; 160, ear plate hole of steel beam of bridge deck; 170, positioning process plate; 200, upper segment; 210, lower segment; 220, lower foundation; 230, ear plate of steel pier; 240, ear plate hole of steel pier; 250, graphite copper sleeve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The features and performance of the construction method of the hinged steel bridge pier of the present application are further described in detail below in conjunction with the embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the embodiment of the present application provides a construction method for an articulated steel bridge pier, which includes the following steps:

[0029] After calculating the optimal segment length, the steel pier is divided into an upper segment 200 hinged to the bridge deck steel beam 100 at the top and a lower segment 210 connected to the upper segment 200 at the top, and manufactured separately. The upper segment 200 and the bridge deck steel beam 100 are manufactured as a whole in the factory and transported to the site. When manufacturing the upper segment 200, the maximum error value is estimated by considering the errors in the manufacturing and erection process of the lower foundation 220, and a manufacturing allowance corresponding to the maximum error value is added to the bottom of the upper segment 200 to adjust the elevation of the steel pier after the erection is completed.

[0030] First, the manufactured lower segment 210 is hoisted on the lower foundation 220 pre-constructed on site, and then the upper segment 200 and the bridge deck steel beam 100 are hoisted as a whole and welded to the upper segment 200 and the lower segment 210; the top of the upper segment 200 is provided with a steel pier ear plate 230, and the bridge deck steel beam 100 is provided with a bridge deck steel beam ear plate 110 located on both sides of the steel pier ear plate 230, and the upper segment 200 and the bridge deck steel beam 100 are connected by passing through the bridge deck steel beam ear plate 110 and the steel pier ear plate 230. The pin shaft 120 of the bridge pier 230 is hinged, and a graphite copper sleeve 250 with an outer circle and an inner ellipse cross section is installed in the circular steel pier ear plate hole 240 of the steel pier ear plate 230, and the long axis of the inner ellipse cross section of the graphite copper sleeve 250 is arranged horizontally; when the bridge deck system steel beam ear plate 110 is manufactured, the ear plate that has been cut is first machined and opened, and when the opening of the bridge deck system steel beam ear plate 110 meets the tolerance requirements, it is installed to the bottom plate of the bridge deck system steel beam 100, and the center of the bridge deck system steel beam ear plate hole 160 of the bridge deck system steel beam ear plate 110 is controlled to the bottom of the bridge deck system steel beam 100 The distance H2 between the plates is completed, and the preliminary positioning is completed and spot welded, and the process shaft 130 is inserted into the bridge deck steel beam ear plate hole 160 of the two bridge deck steel beam ear plates 110 to adjust the concentricity of the opening, and a reinforcing process plate 140 for resisting welding deformation is set between the two bridge deck steel beam ear plates 110, and steel beam ear plates 150 are welded on both sides of the bridge deck steel beam ear plates 110, and a positioning process plate 170 is set between the bottom plate of the bridge deck steel beam 100 and the steel beam ear plates 150. After the welding is completed, the process shaft 130 and the reinforcing process plate 140 are removed. Process plate 140; when the steel pier ear plate 230 is manufactured, the steel pier ear plate 230 is first assembled according to the process flow and then the steel pier ear plate hole 240 is machined and opened. When machining and opening the hole, firstly, the ear plate number of the steel pier ear plate 230 is controlled to cut the material size and reserve a machining allowance for the opening. The hole is opened according to the estimated maximum assembly error, and the positioning and verticality of the opening of the steel pier ear plate 230 and the distance H1 from the center of the opening to the top plate of the upper segment 200 are controlled. Finally, the graphite copper sleeve 250 is installed in the steel pier ear plate hole 240.

[0031] The construction method of the hinged steel pier provided in the embodiment of the present application is to divide the steel pier into an upper segment 200 hinged to the bridge deck steel beam 100 at the top and a lower segment 210 connected to the upper segment 200 at the top, and to adjust the elevation of the steel pier after the erection is completed by adding a manufacturing allowance corresponding to the maximum error value at the bottom of the upper segment 200, so as to optimize the on-site erection process and ensure the accuracy and feasibility of the installation of the steel pier; when making the bridge deck steel beam ear plate 110, first locate the distance from the center of the bridge deck steel beam ear plate hole 160 to the bottom plate of the bridge deck steel beam 100, and use the process shaft 130 to penetrate the bridge deck steel beam ear plate holes 160 of the two bridge deck steel beam ear plates 110 to adjust the concentricity of the openings, and then set a Strengthening the process plate 140 and welding the steel beam ear plates 150 on both sides of the bridge deck steel beam ear plate 110 can effectively improve the position accuracy of the bridge deck steel beam ear plate hole 160, and ensure that the matching accuracy of the bridge deck steel beam ear plate hole 160 and the steel pier ear plate hole 240 meets the requirements; when manufacturing the steel pier ear plate 230, first control the ear plate number of the steel pier ear plate 230 to cut the material size and reserve the machining allowance for the opening, and then open the hole according to the estimated maximum assembly error, then control the positioning and verticality of the opening of the steel pier ear plate 230 and the distance H1 from the center of the opening to the top plate of the upper segment 200, and finally install the graphite copper sleeve 250 in the steel pier ear plate hole 240, which can improve the accuracy of the steel pier ear plate hole 240 and ensure the positioning and matching accuracy between the steel pier ear plate hole 240 and the bridge deck steel beam ear plate hole 160. In addition, by installing the graphite copper sleeve 250 with an outer circle and an inner ellipse in the steel bridge pier ear plate hole 240, the problem of difficult control of the opening tolerance of the steel bridge pier ear plate hole 240 is solved, which is conducive to the production, installation and positioning of the graphite copper sleeve 250. The construction method of the hinged steel bridge pier provided in the embodiment of the present application solves the problem of precision control of the coordination between various structures by optimizing the above-mentioned manufacturing and processing technology, and ensures that the connection state between the steel bridge pier and the bridge deck steel beam 100 meets the design requirements.

[0032] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A construction method for an articulated steel bridge pier, characterized in that: It includes the following steps: After calculating the optimal segment length, the steel pier is divided into an upper segment hinged to the bridge deck steel beam at the top and a lower segment connected to the upper segment at the top, and the upper segment and the bridge deck steel beam are manufactured as a whole in the factory and transported to the site. At the site, the manufactured lower segment is first hoisted on the lower foundation pre-constructed on the site, and then the upper segment and the bridge deck steel beam are hoisted as a whole and welded and fixed. A steel pier ear plate is provided on the top of the upper segment, and the bridge deck steel beam is provided with bridge deck steel beam ear plates respectively located on both sides of the steel pier ear plate. The upper segment and the bridge deck steel beam are hinged by a pin passing through the bridge deck steel beam ear plate and the steel pier ear plate. A graphite copper sleeve with an outer circle and an inner ellipse cross section is installed in the circular ear plate hole of the steel pier ear plate. When the steel pier ear plate is manufactured, the steel pier ear plate is first assembled according to the process flow and then the ear plate hole is machined. First, the numerical cutting size of the steel pier ear plate opening is controlled, and the machining allowance of the opening is reserved according to the estimated maximum assembly error value. After the upper segment is assembled, the steel pier ear plate opening is machined. The positioning, verticality and the distance H1 from the center of the opening to the top plate of the upper segment of the steel pier ear plate opening are controlled by machining. Finally, the graphite copper sleeve is installed in the ear plate hole. When manufacturing the bridge deck steel beam ear plate, firstly machine the ear plate holes after cutting. When the opening of the bridge deck steel beam ear plate reaches the tolerance requirement, install it to the bridge deck steel beam bottom plate, control the distance H2 from the center of the opening of the bridge deck steel beam ear plate to the bridge deck steel beam bottom plate, complete the preliminary positioning and spot welding, and insert the process axis into the two bridge deck steel beam ear plates to adjust the concentricity of the opening. Set a reinforcing process plate between the two bridge deck steel beam ear plates to resist welding deformation. Finally, weld the bridge deck steel beam ear plate to the bridge deck bottom plate. After welding, withdraw the process axis and the reinforcing process plate.

2. The construction method of the hinged steel bridge pier according to claim 1 is characterized in that: When manufacturing the upper segment, the maximum error value is estimated by taking into account the errors in the lower foundation manufacturing and erection process, and a manufacturing allowance corresponding to the maximum error value is added to the bottom of the upper segment to adjust the elevation after the steel pier is erected.

3. The construction method of hinged steel bridge pier according to claim 1, characterized in that: The cross section of the graphite copper sleeve is an outer circle and an inner ellipse with a long axis arranged horizontally.

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