Navigation hole steel box girder mounting method

Abstract

The invention provides a navigation hole steel box girder installation method, and relates to the technical field of bridge construction, the navigation hole steel box girder installation method comprises the following steps: dividing a group of steel box girders on navigation holes into five blocks along the width direction, recording the five blocks as first to fifth blocks, and processing and forming the first to fifth blocks; sequentially hoisting the first block and the third block, and connecting the first block and the third block to the corresponding temporary buttresses; hoisting the second block between the first block and the third block, and temporarily fixing the second block by using a matching piece; the fifth block is hoisted until the two ends of the fifth block are connected to the corresponding temporary buttresses; hoisting the fourth block to a position between the first block and the fifth block, and temporarily fixing the fourth block by using a matching piece; and the first block, the second block, the third block and the fifth block are welded together. A temporary support does not need to be mounted and dismounted on the water surface, the mounting time is saved, and the bridge building speed is increased.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for installing a steel box girder for a navigation hole. Background Art

[0002] A bridge generally refers to a structure built across rivers, lakes, and seas to enable vehicles, pedestrians, etc. to pass smoothly. In the process of building a bridge on water, in order not to affect the passage of ships, several temporary piers are usually built between two adjacent concrete piers to form multiple groups of navigation holes. Each group of temporary piers is set up with three along the width of the bridge. A temporary bracket is set up between two adjacent groups of temporary piers by adopting the inverted hole method. The temporary bracket is used for temporary support when the steel box girder segment is erected. Temporary brackets are installed on two adjacent groups of navigation holes each time. The remaining groups of navigation holes need to be provided for normal passage of ships on the river surface. The pre-welded steel box girder segment is hoisted to the temporary bracket and the two ends of the steel box girder segment are respectively abutted on the adjacent groups of temporary piers to complete the erection of the steel box girder segment above the navigation hole. After that, the temporary bracket on the navigation hole is removed to restore the normal navigation of the navigation hole, and the same steps are used to continue to complete the erection of the steel box girder segment at the remaining navigation holes. However, this construction method requires repeated erection of temporary brackets to achieve the installation and removal of temporary brackets, which takes a long construction period and seriously affects the construction progress. Summary of the invention

[0003] The problem to be solved by the present invention is how to increase the installation speed of the steel box girder.

[0004] To this end, the present invention provides a method for installing a navigation hole steel box girder, comprising the following steps:

[0005] S1. Divide a group of steel box girders on a navigation hole into five blocks along the width direction, which are recorded as the first block, the second block, the third block, the fourth block and the fifth block, wherein the first block, the third block and the fifth block respectively correspond to the three temporary piers of each group, and the first block to the fifth block are respectively processed and formed;

[0006] S2, hoisting the first block and the third block in sequence until both ends of the first block and the third block are respectively connected to the corresponding temporary piers;

[0007] S4, hoisting the second block between the first block and the third block, and temporarily fixing it with matching parts;

[0008] S5, hoisting the fifth block until both ends of the fifth block are connected to the corresponding temporary piers;

[0009] S6, hoisting the fourth block between the third block and the fifth block, and temporarily fixing it using the matching piece;

[0010] S7, welding the first block to the fifth block together;

[0011] S9, installing the steel box girders on the remaining navigation holes according to the above steps;

[0012] S10, welding the plurality of steel box girders and bridge piers together.

[0013] Optionally, the second block is divided into multiple blocks along the length direction, and during hoisting, multiple second blocks are hoisted in sequence.

[0014] Optionally, the fourth block is divided into multiple blocks along the length direction, and during hoisting, multiple fourth blocks are hoisted in sequence.

[0015] Optionally, between S7 and S9, the following steps are also included:

[0016] S8. Check the quality of the weld.

[0017] Optionally, the matching member includes a support plate, a connecting plate and bolts, one end of the support plate is connected to each block structure of the steel box girder, the other end of the support plate is connected to the connecting plate, and the connecting plate is provided with a connecting hole;

[0018] The temporary fixation using matching parts includes: connecting the matching parts to two adjacent structures of the steel box girder respectively, abutting the connecting plates of the matching parts of the two adjacent structures, and locking the connecting plates of the two matching parts by means of the bolts.

[0019] Optionally, a plurality of connection holes are provided on the connection plate.

[0020] Optionally, the first block to the fifth block are all hoisted using a floating crane of a crane ship.

[0021] Optionally, the first block to the fifth block are all provided with lifting ears.

[0022] Optionally, before the first block to the fifth block are respectively formed, the method further includes:

[0023] The deflection deformation, the lateral rotation angle and the longitudinal rotation angle of the first block to the fifth block are calculated.

[0024] Optionally, between S2 and S4, the following steps are also included:

[0025] S3. Detect the angles of the first block and the third block and make fine adjustments until the length directions of the first block and the third block extend along the length direction of the bridge.

[0026] Compared with the prior art, the navigation hole steel box girder installation method of the present invention has the following beneficial effects:

[0027] The present invention divides a group of steel box girders on a navigation hole into five blocks along the width direction of the bridge, that is, the X-axis direction, and records them as the first block, the second block, the third block, the fourth block and the fifth block, wherein the positions of the first block, the third block and the fifth block are used to correspond to the positions of three temporary piers respectively, and the five steel box girders are processed and formed, and the first block and the third block are sequentially hoisted to the corresponding temporary piers, and the two ends of the first block along the length direction, that is, the Y-axis direction are respectively connected to the corresponding two temporary piers in the two adjacent groups of temporary piers. Similarly, the two ends of the third block along the length direction are respectively connected to the corresponding two temporary piers in the two adjacent groups of temporary piers. The temporary piers support the first block and the third block. After the first block and the third block are hoisted, the second block is hoisted between the first block and the third block, and the first block and the third block are hoisted. The second block is temporarily fixed between the first block and the third block by using a matching piece, and the fifth block is hoisted to the two ends of the fifth block in the length direction and respectively connected to the corresponding two temporary piers in the two adjacent groups of temporary piers, and the fourth block is hoisted between the third block and the fifth block and temporarily fixed by using a matching piece, and the fourth block is fixed between the third block and the fifth block. After the positions of the first to fifth blocks are fixed, the first to fifth blocks are welded together to complete the installation of the steel box girder on one navigation hole, and then the steel box girders on the remaining navigation holes are installed on the temporary piers according to the above steps, and finally all the steel box girders are welded together, and the two steel box girders at the edge are welded to the piers to complete the installation of the overall steel box girder of the bridge. The present invention does not need to install and disassemble temporary brackets on the water surface, saves installation time, and improves the bridge construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of the method for installing the steel box girder of the navigation hole according to an embodiment of the present invention;

[0029] Figure 2 It is a flow chart of the method for installing the steel box girder of the navigation hole according to an embodiment of the present invention;

[0030] Figure 3 A schematic structural diagram of a bridge according to an embodiment of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a steel box girder according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the installation structure of the steel box girder according to an embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of a matching component according to an embodiment of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the matching component described in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1-steel box girder; 11-first block; 12-second block; 13-third block; 14-fourth block; 15-fifth block; 16-reinforcement plate; 2-matching part; 21-support plate; 22-connecting plate; 23-connecting hole; 24-bolt; 3-navigation hole; 4-temporary pier; 5-weld; 6-crane floating crane. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] It should be noted that in the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as limiting the scope of protection of the present invention.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0040] Moreover, although the present invention is described with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner not described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

[0041] To solve the above problems, Figure 1 , Figure 4 and Figure 5 As shown, the present invention provides a method for installing a navigation hole steel box girder, comprising the following steps:

[0042] S1. Divide the steel box girder 1 on a group of navigation holes 3 into five blocks along the width direction, which are recorded as the first block 11, the second block 12, the third block 13, the fourth block 14 and the fifth block 15, wherein the first block 11, the third block 13 and the fifth block 15 correspond to the three temporary piers 4 of each group respectively, and process the first block 11 to the fifth block 15 respectively;

[0043] S2, hoisting the first block 11 and the third block 13 in sequence until both ends of the first block 11 and the third block 13 are respectively connected to the corresponding temporary piers 4;

[0044] S4, hoisting the second block 12 between the first block 11 and the third block 13, and temporarily fixing it with a matching piece 2;

[0045] S5, hoisting the fifth block 15 until both ends of the fifth block 15 are connected to the corresponding temporary piers 4;

[0046] S6, hoisting the fourth block 14 between the third block 13 and the fifth block 15, and temporarily fixing it using the matching piece 2;

[0047] S7, welding the first block 11 to the fifth block 15 together;

[0048] S9, installing the steel box beams 1 on the remaining navigation holes 3 according to the above steps;

[0049] S10, welding the plurality of steel box girders 1 to the bridge piers.

[0050] The X-axis is the width direction of the bridge, and the Y-axis is the length direction of the bridge. It should be noted that each group of temporary piers 4 refers to a row of piers 4 aligned along the width direction of the bridge. Figure 3 As shown, the row of piers 4 includes three piers 4, and the first block 11, the third block 13 and the fifth block 15 correspond to the three temporary piers 4 in each group, that is, in the left and right directions, the first block 11, the third block 13 and the fifth block 15 are respectively located on the three temporary piers 4. Figure 5 As shown, along the length direction of the bridge, that is, the Y-axis direction, the steel box girder 1 has a certain span. Specifically, in the Y-axis direction, the two ends of each structure of the steel box girder 1 can be supported on the corresponding temporary piers 4 in two adjacent groups of temporary piers 4. For example, the two ends of the first block 11 along the length direction of the bridge are respectively supported on the corresponding two temporary piers 4 in two adjacent groups of temporary piers 4, so as to achieve the bridging of adjacent steel box girders 1 along the length direction.

[0051] In this embodiment, the steel box girder 1 on a group of navigation holes 3 is divided into five blocks along the width direction of the bridge, that is, the X-axis direction, which are recorded as the first block 11, the second block 12, the third block 13, the fourth block 14 and the fifth block 15, wherein the positions of the first block 11, the third block 13 and the fifth block 15 are used to correspond to the positions of the three temporary piers 4 respectively, and the five steel box girders 1 are processed and formed, and the first block 11 and the third block 13 are sequentially hoisted to the corresponding temporary piers 4, and the two ends of the first block 11 along the length direction, that is, the Y-axis direction are respectively connected to the corresponding two temporary piers 4 in the two adjacent groups of temporary piers 4. Similarly, the two ends of the third block 13 along the length direction are respectively connected to the corresponding two temporary piers 4 in the two adjacent groups of temporary piers 4. The temporary piers 4 support the first block 11 and the third block 13. After the first block 11 and the third block 13 are hoisted, the second block 12 is hoisted to the first block 11 and the third block 1 3, and use the matching piece 2 to temporarily fix the second block 12 between the first block 11 and the third block 13, then hoist the fifth block 15 to its two ends in the length direction and respectively connect them to the corresponding two temporary piers 4 in the two adjacent groups of temporary piers 4, then hoist the fourth block 14 between the third block 13 and the fifth block 15, and use the matching piece 2 to temporarily fix it, fix the fourth block 14 between the third block 13 and the fifth block 15, after the positions of the first block 11 to the fifth block 15 are fixed, weld the first block 11 to the fifth block 15 together to complete the installation of the steel box girder 1 on one navigation hole 3, and then install the steel box girders 1 on the remaining navigation holes 3 on the temporary piers 4 according to the above steps, finally weld all the steel box girders 1 together, and weld the two steel box girders 1 at the edge to the piers to complete the installation of the overall steel box girder 1 of the bridge, the present invention does not need to install and disassemble temporary brackets on the water surface, saves installation time, and improves the bridge construction speed.

[0052] Optionally, the second block 12 is divided into multiple blocks along the length direction, and during hoisting, multiple second blocks 12 are hoisted in sequence.

[0053] In this embodiment, due to the structural limitations of the steel box girder 1 itself, such as Figure 4 As shown, the length of the steel box girder 1 on the navigation channel 3 is at least ten meters, and the box bodies of the first block 11, the third block 13 and the fifth block 15 of the steel box girder 1 all include a reinforcing plate 16 connected between the upper surface and the lower surface of the steel box girder 1. The reinforcing plate 16 improves the structural stability of the first block 11, the third block 13 and the fifth block 15, so that the long-distance steel box girder 1 will not be deformed during the lifting process. There is no reinforcing plate 16 inside the second block 12. In order to prevent the second block 12 from deforming during lifting, the second block 12 is divided into multiple blocks along its length direction. The multiple second blocks 12 are sequentially lifted between the first block 11 and the third block 13 during lifting, and are fixed with matching parts 2.

[0054] Optionally, the fourth block 14 is divided into multiple blocks along the length direction, and during hoisting, multiple fourth blocks 14 are hoisted in sequence.

[0055] In this embodiment, the fourth block 14 is divided into multiple blocks along its length direction. The multiple fourth blocks 14 are sequentially hoisted between the fifth block 15 and the third block 13 during hoisting and fixed with matching parts 2 to prevent the fourth block 14 from being deformed during hoisting.

[0056] Alternatively, if Figure 2 As shown, between S7 and S9, the following is also included:

[0057] S8. Check the quality of the weld 5.

[0058] In this embodiment, the quality of the weld 5 after welding is checked, for example, a visual inspection is performed to check whether the weld 5 has defects such as cracks, pores, unfusion, slag inclusions, etc., and the unqualified weld 5 is re-welded to improve the overall structural stability of the steel box girder 1.

[0059] Alternatively, if Figure 6 and Figure 7 As shown, the matching member 2 includes a support plate 21, a connecting plate 22 and a bolt 24. One end of the support plate 21 is connected to each block structure of the steel box girder 1, and the other end of the support plate 21 is connected to the connecting plate 22. The connecting plate 22 is provided with a connecting hole 23.

[0060] The temporary fixation using the matching piece 2 includes: respectively connecting the matching piece 2 to two adjacent structures of the steel box girder 1, abutting the connecting plates 22 of the matching pieces of the two adjacent structures, and locking the connecting plates 22 of the two matching pieces by the bolts 24.

[0061] In this embodiment, a matching piece 2 is provided, and the matching piece 2 includes a supporting plate 21 and a connecting plate 22 that are connected to each other. The supporting plates 21 of the two matching pieces 2 are respectively connected to the structures of the two adjacent steel box girders 1, and are located on both sides of the weld 5 of the two adjacent steel box girders 1. The end of the supporting plate 21 away from the structure of the steel box girder 1 is connected to the connecting plate 22, and the connecting plate 22 extends toward the weld 5. When the structures of the two adjacent steel box girders 1 are butted together, for example, when the first block 11 and the second block 12 are butted together, the connecting plate 22 on the first block 11 and the connecting plate 22 on the second block 12 are butted, and a connecting hole 23 is opened on the connecting plate 22. The two connecting plates 22 are connected together using bolts 24 to achieve temporary fixation of the first block 11 and the second block 12.

[0062] Specifically, the support plate 21 is welded to the steel box girder 1 , and a plurality of matching parts 2 are provided on both sides of each weld 5 on the steel box girder 1 to enhance the structural stability of the temporary fixation.

[0063] Alternatively, if Figure 7 As shown, a plurality of connection holes 23 are formed on the connection plate 22 .

[0064] In this embodiment, a plurality of connection holes 23 are provided on the connection plate 22, and the plurality of connection holes 23 are connected by bolts 24, thereby improving the connection stability between the two matching parts 2 and improving the structural stability of the temporary fixation.

[0065] Alternatively, if Figure 5 As shown, the first block 11 to the fifth block 15 are all hoisted by a floating crane 6 of a crane ship.

[0066] In this embodiment, by hoisting the first block 11, the second block 12, the third block 13, the fourth block 14 and the fifth block 15 using the floating crane 6 of the crane ship, the difficulty of hoisting is reduced, and it is convenient to hoist the steel box girder 1 on the water surface.

[0067] Optionally, the first block 11 to the fifth block 15 are all provided with lifting ears.

[0068] In this embodiment, lifting ears are provided on the first block 11, the second block 12, the third block 13, the fourth block 14 and the fifth block 15, and the lifting ears are used as lifting points to facilitate lifting.

[0069] Specifically, the first block 11 , the second block 12 , the third block 13 , the fourth block 14 and the fifth block 15 each have a plurality of lifting ears.

[0070] Optionally, before the first block 11 to the fifth block 15 are respectively formed, the method further includes:

[0071] The deflection deformation, the lateral rotation angle and the longitudinal rotation angle of the first block 11 to the fifth block 15 are calculated.

[0072] In this embodiment, before processing the first block 11, the second block 12, the third block 13, the fourth block 14 and the fifth block 15, the downward deflection, the lateral angle and the longitudinal angle are calculated by simulation software, such as MIDAS software, and then processed and formed to ensure that the structure meets the design requirements after the steel box girder 1 is installed and formed.

[0073] Alternatively, if Figure 2 As shown, between S2 and S4, it also includes:

[0074] S3, detecting the angles of the first block 11 and the third block 13 and making fine adjustments until the length directions of the first block 11 and the third block 13 extend along the length direction of the bridge.

[0075] In this embodiment, by detecting the angles of the first block 11 and the third block 13 and performing fine adjustments, such as using a jack for fine adjustments, it is ensured that the first block 11 and the third block 13 extend along the Y-axis direction, leaving an installation position for the second block 12, so that the second block 12 can be installed between the first block 11 and the third block 13.

[0076] Specifically, after the fifth block 15 is hoisted, the angle is also detected and fine-tuned so that the fifth block 15 extends along the Y-axis direction.

[0077] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for installing a navigation hole steel box girder, characterized in that: The steps include: S1. Divide a steel box girder (1) on a group of navigation holes (3) into five blocks along the width direction, which are marked as a first block (11), a second block (12), a third block (13), a fourth block (14) and a fifth block (15), wherein the first block (11), the third block (13) and the fifth block (15) respectively correspond to three temporary piers (4) of each group, and process the first block (11) to the fifth block (15) respectively; S2, hoisting the first block (11) and the third block (13) in sequence until both ends of the first block (11) and the third block (13) are respectively connected to the corresponding temporary piers (4); S4, hoisting the second block (12) between the first block (11) and the third block (13), and temporarily fixing it using a matching piece (2); S5, hoisting the fifth block (15) until both ends of the fifth block (15) are connected to the corresponding temporary piers (4); S6, hoisting the fourth block (14) between the third block (13) and the fifth block (15), and temporarily fixing it using the matching piece (2); S7, welding the first block (11) to the fifth block (15) together; S9, installing the steel box beams (1) on the remaining navigation holes (3) according to the above steps; S10, welding a plurality of the steel box girders (1) to the bridge piers.

2. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: The second block (12) is divided into a plurality of blocks along the length direction, and during hoisting, a plurality of the second blocks (12) are hoisted in sequence.

3. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: The fourth block (14) is divided into multiple blocks along the length direction. During hoisting, multiple fourth blocks (14) are hoisted in sequence.

4. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: Also included between S7 and S9: S8. Check the quality of the weld (5).

5. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: The matching member (2) comprises a support plate (21), a connecting plate (22) and bolts (24); one end of the support plate (21) is connected to each structure of the steel box girder (1); the other end of the support plate (21) is connected to the connecting plate (22); and a connecting hole (23) is provided on the connecting plate (22); The temporary fixation using the matching piece (2) comprises: connecting the matching piece (2) to two adjacent structures of the steel box girder (1) respectively, abutting the connecting plates (22) of the matching pieces (2) of the two adjacent structures, and locking the connecting plates (22) of the two matching pieces (2) by means of the bolts (24).

6. The method for installing a navigation hole steel box girder according to claim 5, characterized in that: The connecting plate (22) is provided with a plurality of connecting holes (23).

7. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: The first block (11) to the fifth block (15) are all hoisted using a floating crane (6) on a crane ship.

8. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: The first block (11) to the fifth block (15) are all provided with lifting ears.

9. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: Before the first block (11) to the fifth block (15) are respectively formed, the method further comprises: The deflection deformation, the lateral rotation angle and the longitudinal rotation angle of the first block (11) to the fifth block (15) are calculated.

10. The method for installing a navigation hole steel box girder according to claim 1, characterized in that: Also included between S2 and S4: S3, detecting the angles of the first block (11) and the third block (13) and making fine adjustments until the length directions of the first block (11) and the third block (13) extend along the length direction of the bridge.

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