Positioning and mounting mechanism for main pier steel box girder of cable-stayed bridge

Abstract

The utility model relates to a positioning and mounting mechanism for a main pier steel box girder of a cable-stayed bridge, and belongs to the technical field of positioning and mounting of steel box girders. The positioning and mounting mechanism comprises a pushing device and a sliding piece, and the pushing device is arranged at the end of a main pier steel beam and used for pushing a steel box beam body; the sliding part is arranged at the top end of the main pier steel beam in a connected mode, the sliding part is connected to the bottom end of the steel box beam body in a sliding mode, a positioning hole is formed in the center of the side, close to the pushing device, of the steel box beam body, and one end of the pushing device extends into the positioning hole to push the steel box beam body. In use, the sliding part is slidably connected to the bottom end of the steel box girder body, a positioning hole is formed in the center of the side, close to the pushing device, of the steel box girder body, one end of the pushing device extends into the positioning hole to push the steel box girder body, the pushing stability can be guaranteed, operation is easy and convenient when the steel box girder is positioned and installed, and the construction efficiency is improved. And the efficiency is improved while the positioning and mounting precision is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of steel box girder positioning and installation, and in particular to a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge. Background Art

[0002] A cable-stayed bridge, also known as a cable-stayed bridge, is a type of bridge in which the main beam is directly pulled onto the bridge tower by many cables. It is a structural system composed of pressure-bearing towers, tensioned cables and bending-bearing beams. It can be seen as a multi-span elastically supported continuous beam with cables replacing piers. It can reduce the bending moment in the beam body, lower the building height, reduce the structural weight and save materials. A cable-stayed bridge is mainly composed of cable towers, main beams and inclined cables. After the construction of the cable-stayed bridge begins, the first section of steel box girder is first installed on the main pier of the cable-stayed bridge. During installation, after the steel box girder is hoisted onto the main pier of the cable-stayed bridge, its position needs to be adjusted by multiple jacks and tank rollers before installation. This process is more cumbersome and inefficient. Summary of the invention

[0003] The embodiment of the present application provides a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge, so as to solve the problem in the related art that the positioning and installation of the steel box girder is complicated in operation and affects the construction efficiency.

[0004] The embodiment of the present application provides a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge, comprising:

[0005] A jacking device, which is arranged at the end of the main pier steel beam and is used to jack the steel box beam body;

[0006] A sliding member is connected to the top of the main pier steel beam, and is slidably connected to the bottom of the steel box beam body. A positioning hole is opened in the central part of the steel box beam body on one side close to the jacking device, and one end of the jacking device extends into the positioning hole to jack the steel box beam body.

[0007] In some embodiments, the pushing device is a hydraulic telescopic rod.

[0008] In some embodiments, the positioning hole includes a conical hole section whose diameter decreases from the outside to the inside and a circular hole section connected to one side of the conical hole section, the diameter of the circular hole section is the same as the minimum diameter of the conical hole section, and the diameter of the circular hole section is not less than the diameter of the hydraulic telescopic rod.

[0009] In some embodiments, the main pier steel beam includes two connected and fixed support beams, each support beam has a groove on the top, and the sliding member is arranged in the groove;

[0010] The sliding member comprises a base and a spherical steel wheel arranged on the top of the base, and the top surface of the spherical steel wheel is higher than the top surface of the support beam.

[0011] In some embodiments, a plurality of the sliding members are provided, and the plurality of the sliding members are spaced apart along the length direction of the support beam.

[0012] In some embodiments, the main pier steel beam also includes a connecting section arranged between the two supporting beams, and the pushing device is arranged on the connecting section.

[0013] In some embodiments, a fixing seat for mounting the pushing device is provided on the connecting section.

[0014] In some embodiments, a plurality of support frames are provided at the bottom of the main pier steel beam for supporting.

[0015] In some embodiments, the main pier steel beam is arranged on the main pier of the cable-stayed bridge.

[0016] In some embodiments, the support frame includes a pressure-bearing column and a plurality of support columns vertically arranged at the bottom of the pressure-bearing column, and a reinforcement rod for reinforcement is arranged between two adjacent support columns.

[0017] The beneficial effects of the technical solution provided by this application include:

[0018] An embodiment of the present application provides a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge. The positioning and installation mechanism of the present application includes a pushing device and a sliding member. The pushing device is arranged at the end of the main pier steel beam and is used to push the steel box girder body. The sliding member is connected to the top of the main pier steel beam, and the sliding member is slidably connected to the bottom end of the steel box girder body. A positioning hole is opened in the central part of the steel box girder body on one side close to the pushing device, and one end of the pushing device extends into the positioning hole to push the steel box girder body.

[0019] In actual use, the pushing device can push the steel box girder body, and the sliding member is slidably connected to the bottom end of the steel box girder body. Therefore, when the steel box girder body is pushed by the pushing device, it can be moved to the designed position and installed. A positioning hole is opened in the central part of the steel box girder body on one side close to the pushing device. One end of the pushing device is inserted into the positioning hole to push the steel box girder body. During this period, the stability of the pushing can be guaranteed, which makes the operation of positioning and installing the steel box girder relatively simple, and improves efficiency while ensuring the positioning and installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the overall structure of the mechanism provided in the embodiment of the present application;

[0022] Figure 2 for Figure 1 Structural schematic diagram of the steel beam and jacking device of the middle main pier;

[0023] Figure 3 for Figure 1 Structural schematic diagram of the Chinese steel box girder body.

[0024] Reference numerals:

[0025] 1. Main pier of cable-stayed bridge; 2. Steel beam of main pier; 3. Support frame; 4. Steel box beam body; 5. Base; 6. Spherical steel wheel; 7. Fixed seat; 8. Pushing device; 21. Support beam; 22. Connecting section; 31. Pressure column; 32. Support column; 33. Reinforcement rod; 41. Positioning hole. DETAILED DESCRIPTION

[0026] 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The embodiment of the present application provides a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge, which can solve the problem in the related art that the positioning and installation of the steel box girder is complicated and affects the construction efficiency.

[0028] See also Figures 1 to 3 As shown, an embodiment of the present application provides a positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge, comprising a pushing device 8 and a sliding member, wherein the pushing device 8 is arranged at the end of the main pier steel beam 2 and is used to push the steel box girder body 4; the sliding member is connected and arranged at the top end of the main pier steel beam 2, and the sliding member is slidably connected to the bottom end of the steel box girder body 4, and a positioning hole 41 is opened in the central part of one side of the steel box girder body 4 close to the pushing device 8, and one end of the pushing device 8 is extended into the positioning hole 41 to push the steel box girder body 4.

[0029] In actual use, the pushing device 8 can push the steel box girder body 4, and the sliding member is slidably connected to the bottom end of the steel box girder body 4. Therefore, when the steel box girder body 4 is pushed by the pushing device 8, it can be moved to the designed position and installed. A positioning hole 41 is opened in the central part of the steel box girder body 4 on one side close to the pushing device 8. One end of the pushing device 8 is extended into the positioning hole 41 to push the steel box girder body 4. During this period, the stability of the pushing can be guaranteed, which makes the operation of positioning and installing the steel box girder relatively simple, and improves efficiency while ensuring the positioning and installation accuracy.

[0030] In some alternative embodiments, see Figures 1 to 3 As shown, the embodiment of the present application provides a positioning and installation mechanism for the steel box girder of the main pier of a cable-stayed bridge, and the jacking device 8 is a hydraulic telescopic rod. The positioning hole 41 includes a tapered hole section whose diameter decreases from the outside to the inside and a circular hole section connected to one side of the tapered hole section, the diameter of the circular hole section is the same as the minimum diameter of the tapered hole section, and the diameter of the circular hole section is not less than the diameter of the hydraulic telescopic rod.

[0031] Specifically, the positioning hole 41 includes a conical hole section and a circular hole section, and the diameter of the conical hole section decreases from the outside to the inside, that is, Figure 3 As shown, the diameter of the tapered hole section decreases from the end where the side wall of the steel box girder body 4 is located to the end where the interior of the steel box girder body 4 is located. This arrangement facilitates the hydraulic telescopic rod push rod to extend into the positioning hole 41 for top pushing when the push rod of the hydraulic telescopic rod extends into the steel box girder body 4. A circular hole section is provided on one side of the tapered hole section, and the diameter of the circular hole section is not less than the diameter of the hydraulic telescopic rod. When the push rod of the hydraulic telescopic rod goes deep into the circular hole section from the tapered hole section, it can contact the interior of the steel box girder body 4 and top push the steel box girder body 4. The positioning hole 41 is provided at the central part of one side of the steel box girder body 4, so that when the steel box girder body 4 is top pushed, the balance of the steel box girder body 4 can be ensured, and the combination with the positioning hole 41 can ensure that the steel box girder body 4 does not tilt during the top pushing process, which helps to ensure accurate positioning during the entire process of the steel box girder body 4 being top pushed into place.

[0032] Specifically, in actual use, one end of the push rod of the hydraulic telescopic rod is a hemispherical structure. When it extends into the circular hole section to push the steel box girder body 4, the maximum extension distance of the push rod of the hydraulic telescopic rod can be set to the sliding distance during the installation of the steel box girder body 4, that is, when the push rod of the hydraulic telescopic rod is extended, the steel box girder body 4 can be directly pushed to the installation position on the main pier steel beam 2.

[0033] In some optional embodiments, such as Figure 1 and Figure 2As shown, the embodiment of the present application provides a positioning and installation mechanism for the steel box girder of the main pier of a cable-stayed bridge. The main pier steel beam 2 includes two connected and fixed support beams 21. A groove is provided on the top of each support beam 21, and a sliding member is arranged in the groove. The sliding member includes a base 5 and a spherical steel wheel 6 arranged on the top of the base 5. The top surface of the spherical steel wheel 6 is higher than the top surface of the support beam 21. Specifically, a plurality of sliding members are provided, and the plurality of sliding members are arranged at intervals along the length direction of the support beam 21.

[0034] In actual use, a groove is opened on the top of the support beam 21, and the sliding member is arranged in the middle position of the groove. The sliding member includes a base 5 and a spherical steel wheel 6 arranged on the top of the base 5, and the top surface of the spherical steel wheel 6 is higher than the top surface of the support beam 21. When the steel box beam body 4 is hoisted onto the main pier steel beam 2, the bottom of the steel box beam body 4 falls on the spherical steel wheel 6, and the steel box beam body 4 can slide with the help of each spherical steel wheel 6, which is convenient for pushing the steel box beam body 4.

[0035] Compared with the previous method of using multiple jacks and tank rollers to position and install the steel box girder body 4, the method of the present application is relatively simple to operate, and can improve construction efficiency while ensuring the accuracy of positioning and installation of the steel box girder body 4.

[0036] In some optional embodiments, such as Figure 1 and Figure 2 As shown, the main pier steel beam 2 also includes a connecting section 22 arranged between the two support beams 21, and the jacking device 8 is arranged on the connecting section 22. The two support beams 21 are connected by the connecting section 22, and the jacking device 8 is arranged on the connecting section 22, which can ensure that the hydraulic telescopic rod of the jacking device 8 corresponds to the positioning hole 41 opened on the steel box beam body 4, so as to facilitate jacking.

[0037] In some optional embodiments, such as Figure 2 As shown, a fixing seat 7 for installing the pushing device 8 is provided on the connecting section 22 , and the hydraulic telescopic rod of the pushing device 8 can be fixed to the connecting section 22 arranged between the two support beams 21 through the fixing seat 7 .

[0038] like Figure 1 The main pier steel beam 2 is arranged on the main pier 1 of the cable-stayed bridge. A plurality of supporting frames 3 for supporting are arranged at the bottom of the main pier steel beam 2. The arrangement of the supporting frames 3 can support the main pier steel beam 2.

[0039] In some optional embodiments, the support frame 3 includes a pressure column 31 and a plurality of support columns 32 vertically arranged at the bottom of the pressure column 31, and a reinforcement rod 33 for reinforcement is arranged between two adjacent support columns 32. Figure 1As shown, a plurality of pressure-bearing columns 31 are arranged at the bottom of the main pier steel beam 2, a plurality of support columns 32 are vertically arranged at the bottom of the pressure-bearing columns 31 to support the pressure-bearing columns 31, and a reinforcement rod 33 is arranged between two adjacent support columns 32 for reinforcement. The arrangement of the reinforcement rod 33 can ensure the overall structural stability of the support frame 3, thereby ensuring the stability during the process of pushing, positioning and installing the steel box beam body 4.

[0040] When actually installing the steel box girder of the main pier of the cable-stayed bridge, the steel box girder body 4 can be first hoisted to the top of each sliding part on the main pier steel beam 2, that is, the steel box girder body 4 can be placed on each spherical steel wheel 6 to facilitate the movement of the steel box girder body 4. Then, one end of the hydraulic telescopic rod of the pushing device 8 is inserted into the positioning hole 41 opened on one side of the steel box girder body 4 to push the steel box girder body 4. At this time, the positioning hole 41 is opened in the central part of one side of the steel box girder body 4. Even if the steel box girder body 4 is in an inclined state after hoisting, the hydraulic telescopic rod is inserted into the positioning hole 41, and the placement position of the steel box girder body 4 will gradually become straight during the process of pushing the steel box girder body 4.

[0041] In actual use, the positioning hole 41 includes a conical hole section and a circular hole section, and the diameter of the conical hole section decreases from the outside to the inside. This arrangement facilitates the hydraulic telescopic rod push rod to extend into the positioning hole 41 for pushing when it extends into the steel box girder body 4. A circular hole section is provided on one side of the conical hole section, and the diameter of the circular hole section is not less than the diameter of the hydraulic telescopic rod. When the hydraulic telescopic rod push rod goes from the conical hole section to the circular hole section, it can contact the inside of the steel box girder body 4 and push the steel box girder body 4. The positioning hole 41 is provided at the central part of one side of the steel box girder body 4, so when the steel box girder body 4 is pushed, the balance of the steel box girder body 4 can be ensured, and the combination with the positioning hole 41 can ensure that the steel box girder body 4 does not tilt during the pushing process, which helps to ensure accurate positioning during the entire process of pushing the steel box girder body 4 into place. The overall structure of the mechanism is simple, and while ensuring the positioning and installation accuracy of the steel box girder body 4, the construction efficiency can be improved.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0043] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0044] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge, characterized in that: include: A pushing device (8), the pushing device (8) being arranged at the end of the main pier steel beam (2) and used for pushing the steel box beam body (4); A sliding member is connected to the top end of the main pier steel beam (2), and is slidably connected to the bottom end of the steel box beam body (4). A positioning hole (41) is provided at the center of the steel box beam body (4) on one side close to the pushing device (8). One end of the pushing device (8) extends into the positioning hole (41) to push the steel box beam body (4).

2. A positioning and installation mechanism for a cable-stayed bridge main pier steel box girder as claimed in claim 1, characterized in that: The pushing device (8) is a hydraulic telescopic rod.

3. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge as claimed in claim 2, characterized in that: The positioning hole (41) comprises a conical hole section whose diameter decreases from outside to inside and a circular hole section connected to one side of the conical hole section, the diameter of the circular hole section is the same as the minimum diameter of the conical hole section, and the diameter of the circular hole section is not less than the diameter of the hydraulic telescopic rod.

4. The positioning and installation mechanism for the steel box girder of the main pier of a cable-stayed bridge according to claim 1, characterized in that: The main pier steel beam (2) comprises two connected and fixed support beams (21), each support beam (21) having a groove formed on the top, and the sliding member is arranged in the groove; The sliding member comprises a base (5) and a spherical steel wheel (6) arranged on the top of the base (5), and the top surface of the spherical steel wheel (6) is higher than the top surface of the support beam (21).

5. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge as claimed in claim 4, characterized in that: A plurality of sliding members are provided, and the plurality of sliding members are arranged at intervals along the length direction of the support beam (21).

6. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge as claimed in claim 4, characterized in that: The main pier steel beam (2) further comprises a connecting section (22) arranged between the two supporting beams (21), and the jacking device (8) is arranged on the connecting section (22).

7. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge as claimed in claim 6, characterized in that: The connecting section (22) is provided with a fixing seat (7) for mounting the pushing device (8).

8. The positioning and installation mechanism for the steel box girder of the main pier of a cable-stayed bridge according to claim 1, characterized in that: A plurality of support frames (3) for supporting are arranged at the bottom of the main pier steel beam (2).

9. The positioning and installation mechanism for the steel box girder of the main pier of a cable-stayed bridge according to claim 1, characterized in that: The main pier steel beam (2) is arranged on the main pier (1) of the cable-stayed bridge.

10. A positioning and installation mechanism for a steel box girder of a main pier of a cable-stayed bridge as claimed in claim 8, characterized in that: The support frame (3) comprises a pressure-bearing column (31) and a plurality of support columns (32) vertically arranged at the bottom of the pressure-bearing column (31), and a reinforcement rod (33) for reinforcement is arranged between two adjacent support columns (32).

Images