Accurate positioning and mounting method for repeated slippage of steel box girder

Abstract

The invention provides a precise positioning and mounting method for repeated slippage of a steel box girder, and relates to the field of bridge construction. A plurality of first sliding sections are spliced on a sliding rail of a splicing area and welded into a first sliding unit; a sliding device is installed on the sliding rail, and the sliding device is in transmission connection with the first sliding unit; the sliding equipment is started to drive the first sliding unit to slide on the sliding track; after moving out of the assembling area, the sliding is stopped; a plurality of second sliding subsections are spliced on the sliding track where the vacant splicing area is located, and a second sliding unit is formed through welding; the second sliding unit and the first sliding unit are welded into a steel box girder sliding unit; a sliding device is installed on the sliding rail, and the sliding device is in transmission connection with the steel box girder sliding unit; the steel box girder sliding unit is driven to slide on the sliding rail; when the steel box girder sliding unit slides out of the assembly area, sliding is stopped; and repeating the operation. The method can solve the problem that construction cannot be carried out due to site limitation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction, in particular to a steel box girder cumulative sliding precise positioning installation method. BACKGROUND

[0002] With the continuous development of transportation infrastructure construction, bridge construction is faced with various complex terrains, environments and use requirements. When building a steel box girder bridge in the city, there are often dense buildings, busy traffic lines, crossing existing traffic roads, crossing rivers, etc. around. The conventional construction methods are: (1) in-situ hoisting, which greatly affects traffic, and is easy to cause traffic paralysis; (2) push method construction, which requires a large longitudinal site, and must reserve a push assembly site during construction; (3) ordinary sliding method construction, which requires a large transverse site, which may exceed the project red line range. SUMMARY

[0003] One of the purposes of the present application is to provide a steel box girder cumulative sliding precise positioning installation method, which aims to solve the problem that the existing steel box girder bridge construction in the city will cause traffic paralysis.

[0004] The technical scheme of the present application is: A steel box girder cumulative sliding precise positioning installation method, comprising the following steps: S1, the bridge steel box girder to be installed is divided into a plurality of first sliding units and second sliding units in sequence, the first sliding units are divided into a plurality of first sliding segments in sequence, and the second sliding units are divided into a plurality of second sliding segments in sequence; S2, installing a sliding support in the assembly area close to the bent cap, installing a sliding beam on the sliding support and the bent cap, and installing a sliding rail on the sliding beam; S3, assembling a plurality of first sliding segments on the sliding rail where the assembly area is located, and welding into the first sliding unit; S4, installing a sliding device on the sliding rail, and connecting the sliding device and the first sliding unit in transmission; S5, starting the sliding device to drive the first sliding unit to slide on the sliding rail, while adjusting the elevation and axis of the first sliding unit; stopping sliding when the first sliding unit slides out of the assembly area; S6, assembling a plurality of second sliding segments on the sliding rail where the empty assembly area is located, and welding into the second sliding unit; welding the second sliding unit and the first sliding unit into a steel box girder sliding unit; connecting the sliding device and the steel box girder sliding unit in transmission; S7, starting the sliding device to drive the steel box girder sliding unit to slide on the sliding rail while adjusting the elevation and axis of the steel box girder sliding unit; stopping sliding when the steel box girder sliding unit slides out of the assembly area; S8, repeating the assembly-sliding action in S6 to S7 until the bridge steel box girder is completely assembled, and adjusting the elevation and axis of the bridge steel box girder during sliding to slide the whole bridge steel box girder to the designed position.

[0005] As a technical solution of the present application, in step S3, a plurality of groups of sliding shoes arranged at intervals are installed on the sliding beam where the assembly area is located, butter is applied between the sliding shoes and the sliding beam, and a driving structure for adjusting the height of the first sliding unit is installed on the sliding shoes; a plurality of segments of the first sliding segment are assembled on a plurality of the driving structures, and the plurality of segments of the first sliding segment are welded into a whole to form the slidable first sliding unit.

[0006] As a technical solution of the present application, in step S5, the driving structure is started to adjust the elevation and axis of the first sliding unit.

[0007] As a technical solution of the present application, the driving structure comprises a walking jack.

[0008] As a technical solution of the present application, in step S6, a plurality of groups of sliding shoes arranged at intervals are installed on the sliding beam where the vacant assembly area is located, butter is applied between the sliding shoes and the sliding beam, and a driving structure for adjusting the height of the second sliding unit is installed on the sliding shoes; a plurality of segments of the second sliding segment are assembled on a plurality of the driving structures, and the plurality of segments of the second sliding segment are welded into a whole to form the slidable second sliding unit; and the second sliding unit and the first sliding unit are welded into a steel box girder sliding unit.

[0009] As a technical solution of the present application, the driving structure comprises a walking jack.

[0010] As a technical solution of the present application, in step S7, the driving structure is started to adjust the elevation and axis of the steel box girder sliding unit.

[0011] As a technical solution of the present application, a plurality of limiting blocks matched with the sliding rail are welded to the lower inner side of the sliding shoe for guiding the sliding shoe; and a plurality of supporting blocks are welded to the lower outer side of the sliding shoe for providing support when the driving structure is adjusted and corrected.

[0012] As a technical scheme of the present application, the sliding device comprises a plurality of crawlers arranged at both ends of the first sliding unit or the steel box girder sliding unit, and the crawlers are in transmission connection with both ends of the first sliding unit or the steel box girder sliding unit through a plurality of ear plates or connecting rods.

[0013] As a technical scheme of the present application, the crawler comprises a clamp and an oil cylinder; the clamp is movably adjusted and clamped on the sliding rail; one end of the oil cylinder is connected to the clamp, and the other end is in transmission connection with one end of a connecting rod through an ear plate; the other end of the connecting rod is in transmission connection with the end of the first sliding unit or the steel box girder sliding unit.

[0014] The present application has the following beneficial effects: (1) The present application designs a steel box girder cumulative sliding accurate positioning installation method, which can complete the assembly of the steel box girder on both sides of the road and then gradually slide to the designed position through the steel box girder segmented cumulative sliding technology, greatly reducing the interference with traffic, and solving the problem that the steel box girder cannot be installed due to small construction site under the premise of ensuring normal traffic.

[0015] (2) Further, it adopts sliding shoe limiting and walking jack correction technology to continuously correct the deviation during the cumulative sliding of the steel box girder, solves the problem of cumulative error and difficult control of installation accuracy during the sliding process of the steel box girder, and greatly improves the installation accuracy of the steel box girder.

[0016] (3) Further, the sliding support of the assembly area can be repeatedly used, reducing the foundation settlement and inelastic deformation during construction, and improving the assembly accuracy of the steel box girder. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Figure 1 The present application provides a multi-segment first sliding segment assembly elevation schematic diagram; Figure 2 The present application provides a multi-segment first sliding segment assembly plan schematic diagram; Figure 3 The present application provides a first sliding unit in a sliding state elevation schematic diagram; Figure 4A multi-section second sliding section assembled facade schematic diagram provided by the embodiment of the present application; Figure 5 A facade schematic diagram of a steel box girder sliding unit in a sliding state provided by the embodiment of the present application; Figure 6 A steel box girder segmented cumulative sliding completion schematic diagram provided by the embodiment of the present application; Figure 7 A sliding shoe schematic diagram provided by the embodiment of the present application; Figure 8 A sliding shoe and sliding beam assembly schematic diagram provided by the embodiment of the present application.

[0019] Icon: 1-first sliding unit; 2-second sliding unit; 3-capped beam; 4-sliding support; 5-sliding beam; 6-sliding track; 7-steel box girder sliding unit; 8-sliding shoe; 9-walking jack; 10-limiting block; 11-supporting block; 12-crawler; 13-ear plate; 14-connecting rod. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings 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 drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0022] It should be noted that: similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] Further, in the present application, unless specifically stated and limited otherwise, the first feature above or below the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature below, under and on the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0025] Further, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present application, it should also be noted that, unless specifically stated and limited otherwise, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Embodiment: Please refer to Figure 1 , and refer to Figures 2 to 8 The present application provides a steel box girder cumulative sliding precise positioning installation method, which comprises the following steps: S1, according to the actual construction conditions, transportation requirements, lifting conditions and the requirements of the specification, the steel box girder is reasonably segmented, that is, the steel box girder to be installed is divided into a plurality of first sliding units 1 and second sliding units 2 in turn, and the first sliding unit 1 is divided into a plurality of first sliding segments in turn, and the second sliding unit 2 is divided into a plurality of second sliding segments in turn; S2, installing sliding support 4 near the assembling area of cover beam 3, installing sliding beam 5 on sliding support 4 and cover beam 3, and installing sliding rail 6 on sliding beam 5; S3, assembling a plurality of first sliding segments on the sliding rail 6 where the assembling area is located, and welding into a first sliding unit 1; installing a plurality of groups of sliding shoes 8 arranged at intervals on the sliding beam 5 where the assembling area is located, installing driving structure for adjusting the height of the first sliding unit 1 on the sliding shoes 8; assembling a plurality of first sliding segments on the plurality of driving structures, and welding the plurality of first sliding segments into a whole to form a slidable first sliding unit 1; S4, installing the sliding device on the sliding track 6, and drivingly connecting the sliding device with the first sliding unit 1; S5, starting the sliding device to drive the first sliding unit 1 to slide on the sliding track 6, and starting the driving structure to adjust the elevation and axis of the first sliding unit 1 during the sliding; and stopping the sliding when the first sliding unit 1 slides out of the assembling area; S6, assembling the second sliding segments on the sliding track 6 where the assembling area is emptied, and welding the second sliding unit 2; welding the second sliding unit 2 with the first sliding unit 1 into the steel box girder sliding unit 7; installing the groups of sliding shoes 8 which are arranged at intervals on the sliding beam 5 where the assembling area is emptied, and smearing butter between the sliding shoes 8 and the sliding beam 5 to reduce the friction; installing the driving structure for adjusting the height of the second sliding unit 2 on the sliding shoes 8; assembling the second sliding segments on the driving structures, and welding the second sliding segments into the second sliding unit 2 which can slide after the second sliding segments are welded into an integral whole; welding the second sliding unit 2 with the first sliding unit 1 into the steel box girder sliding unit 7; and drivingly connecting the sliding device with the steel box girder sliding unit 7; S7, starting the sliding device to drive the steel box girder sliding unit 7 to slide on the sliding track 6, and starting the driving structure to adjust the elevation and axis of the steel box girder sliding unit 7 during the sliding; and stopping the sliding when the steel box girder sliding unit 7 slides out of the assembling area; S8, repeating the assembling and sliding actions in S6 to S7 until the assembling of the bridge steel box girder is completed, and adjusting the elevation and axis of the bridge steel box girder during the sliding to slide the integral bridge steel box girder to the design position.

[0028] Therefore, the steel box girder can be assembled on both sides of the road and then slid to the design position gradually by adopting the steel box girder segmented and cumulative sliding technology, which greatly reduces the interference to the traffic, and solves the problem that the steel box girder cannot be installed due to the small construction site under the premise of ensuring the normal traffic.

[0029] It should be noted that the sliding support 4 of the assembling area comprises a plurality of steel pipe columns, a plurality of angle steel bars and a Bailey frame, the Bailey frame is installed on the plurality of steel pipe columns, and the two ends of the angle steel bar are respectively connected between adjacent steel pipe columns. The sliding support 4 of the assembling area can be repeatedly used, which reduces the foundation settlement and inelastic deformation during the construction process, and improves the assembling precision of the steel box girder.

[0030] It should be noted that the driving structure can be driven by the walking jack 9 in the prior art.

[0031] It should be noted that a plurality of limiting blocks 10 are welded to the lower inner side of the shoe 8 and cooperate with the sliding rail 6, which is used to guide the shoe 8 and prevent the relative displacement of the shoe 8 and the sliding rail 6 in the left and right two transverse directions during the sliding, thereby avoiding the installation error; meanwhile, a plurality of supporting blocks 11 are welded to the lower outer side of the shoe 8, which is used to provide support when the driving structure is adjusted and corrected, that is, the supporting blocks 11 are welded to the shoe 8 and abut against the sliding beam 5, so that the force is transmitted to the sliding beam 5, thereby supporting the driving structure.

[0032] The shoe 8 limiting and step jack 9 correction technology is adopted, the cumulative error of the steel box girder during the sliding is continuously corrected, the problem that the installation accuracy is difficult to control is solved, and the installation accuracy of the steel box girder is greatly improved.

[0033] It should be noted that the sliding device includes a plurality of crawlers 12 arranged at the two ends of the first sliding unit 1 or the steel box girder sliding unit 7, the crawlers 12 are drivingly connected to the two ends of the first sliding unit 1 or the steel box girder sliding unit 7 through a plurality of ear plates 13 or connecting rods 14, and are used to drive the first sliding unit 1 or the steel box girder sliding unit 7 to slide forward on the sliding beam 5.

[0034] It should be noted that the crawler 12 includes a clamp and an oil cylinder; the clamp is movably adjusted and clamped on the sliding rail 6; one end of the oil cylinder is connected to the clamp, and the other end is drivingly connected to one end of the connecting rod 14 through the ear plate 13; the other end of the connecting rod 14 is drivingly connected to the end of the first sliding unit 1 or the steel box girder sliding unit 7. The working principle is as follows: during the operation, the clamp clamps the sliding rail 6, the oil cylinder is elongated to drive the steel box girder to move forward, then the clamp is loosened, the oil cylinder is retracted to drive the clamp to move forward, which is one stroke. Meanwhile, the step jack 9 on the shoe 8 can drive in two directions, that is, the vertical direction and the longitudinal direction; when the elevation of the steel box girder needs to be adjusted, the jacking or lowering jack can adjust the elevation of the steel box girder; when the longitudinal direction of the steel box girder needs to be adjusted, the telescopic jack can adjust the longitudinal direction of the steel box girder; when the transverse direction of the steel box girder needs to be adjusted, the crawler 12 is used to slide and adjust the steel box girder; this is a three-dimensional coordinate adjustment method of the steel box girder.

[0035] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for accurate positioning and installation of steel box beams by repeated sliding, characterized in that: The following steps are involved: S1, dividing the bridge steel box girder to be installed into multiple groups of first sliding units and second sliding units, dividing the first sliding units into multiple first sliding segments, and dividing the second sliding units into multiple second sliding segments; S2, installing a sliding bracket in an assembly area near the cap beam, installing a sliding beam on the sliding bracket and the cap beam, and installing a sliding track on the sliding beam; S3, assembling a plurality of the first sliding segments on the sliding track in the assembly area, and welding them into the first sliding unit; S4, installing a sliding device on the sliding track, and connecting the sliding device to the first sliding unit by transmission; S5, starting the sliding device to drive the first sliding unit to slide on the sliding track, and adjusting the elevation and axis of the first sliding unit; when the first sliding unit slides out of the assembly area, the sliding stops; S6, assembling a plurality of second sliding segments on the sliding track where the vacant assembly area is located, and welding them into a second sliding unit; welding the second sliding unit and the first sliding unit to form a steel box girder sliding unit; and connecting the sliding device to the steel box girder sliding unit in a transmission manner; S7, starting the sliding device to drive the steel box girder sliding unit to slide on the sliding track, and adjusting the elevation and axis of the steel box girder sliding unit; stopping the sliding when the steel box girder sliding unit slides out of the assembly area; S8, repeat the assembly-sliding actions from S6 to S7 until all the bridge steel box girders are assembled, and adjust the elevation and axis of the bridge steel box girder during the sliding process to slide the entire bridge steel box girder to the designed position.

2. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 1 is characterized in that: In step S3, multiple sets of sliding shoes arranged at intervals are installed on the sliding beam where the assembly area is located, butter is applied between the sliding shoes and the sliding beam, and a driving structure for adjusting the height of the first sliding unit is installed on the sliding shoes; multiple sections of the first sliding segments are assembled on multiple driving structures, and the multiple sections of the first sliding segments are welded into a whole to form the sliding first sliding unit.

3. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 2 is characterized in that: In step S5, the driving structure is activated to adjust the elevation and axis of the first sliding unit.

4. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 2, characterized in that: The driving structure includes a walking jack.

5. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 1 is characterized in that: In step S6, multiple sets of sliding shoes arranged at intervals are installed on the sliding beam where the vacant assembly area is located, butter is applied between the sliding shoes and the sliding beam, and a driving structure for adjusting the height of the second sliding unit is installed on the sliding shoes; multiple sections of the second sliding segments are assembled on multiple driving structures, and the multiple sections of the second sliding segments are welded into a whole to form a sliding second sliding unit; the second sliding unit and the first sliding unit are welded to form a steel box beam sliding unit.

6. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 5, characterized in that: The driving structure includes a walking jack.

7. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 5, characterized in that: In step S7, the driving structure is activated to adjust the elevation and axis of the steel box girder sliding unit.

8. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 2 or 5, characterized in that: A plurality of limit blocks cooperating with the sliding track are welded on the inner side of the lower side of the sliding shoe to guide the sliding shoe; a plurality of support blocks are welded on the outer side of the lower side of the sliding shoe to provide support when adjusting and correcting the driving structure.

9. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 1, characterized in that: The sliding device includes multiple groups of crawlers arranged at both ends of the first sliding unit or the steel box girder sliding unit, and the crawlers are transmission-connected to the two ends of the first sliding unit or the steel box girder sliding unit through multiple groups of ear plates or connecting rods.

10. The method for accurate positioning and installation of steel box beams by repeated sliding according to claim 9, characterized in that: The crawler includes a clamp and a cylinder; the clamp is movably and adjustably clamped on the sliding track; one end of the cylinder is connected to the clamp, and the other end is transmission-connected to one end of a connecting rod through an ear plate; the other end of the connecting rod is transmission-connected to the end of the first sliding unit or the steel box girder sliding unit.

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