Pushing platform of steel box girder

Abstract

The pushing platform of the steel box girder comprises a plurality of pushing supports and a plurality of assembling supports, the pushing supports are distributed in an array mode, and each pushing support comprises a support body structure and a pile body structure supported below the support body structure. The frame body structure comprises a cross beam extending in the transverse direction, a longitudinal beam extending in the longitudinal direction and a plurality of cushion blocks arranged between the cross beam and the longitudinal beam in a cushioned mode, the cross beam and the longitudinal beam are horizontally arranged, the longitudinal beam is located above the cross beam, the cross beam is connected to the pile body structure, and a pushing assembly is arranged on the longitudinal beam; the assembling supports and the pushing supports are arranged at intervals, one assembling support is arranged between every two adjacent pushing supports in one column, each assembling support comprises a plurality of vertical stand columns and a bearing structure connected to the tops of the stand columns, the stand columns are arranged at intervals in the transverse direction, and the bearing structures are supported below the steel box girder. The pushing support can bear the counter-acting force applied by the pushing assembly, and the assembling support can provide enough supporting force for the steel box girder and can be rapidly erected, so that the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder jacking, in particular to a steel box girder jacking platform. Background Art

[0002] Affected by topographic and geological conditions, the construction of roads, railways and other transportation projects requires a lot of bridge projects. Steel box girders are widely used in the main beams of bridge structures because of their small structural weight, high tensile strength, fast and convenient construction, and excellent seismic performance. At present, the main construction methods of steel box girders include top-pushing method and in-situ hoisting method. The top-pushing method is widely used because of its advantages such as small construction site required and no impact on traffic or navigation under the bridge.

[0003] The jacking of steel box girders requires the construction of a jacking platform on the river bank or in the river channel, and the installation of jacking equipment on the jacking platform to carry out jacking construction of the steel box girders. To ensure that the jacking platform has sufficient support, the pile foundation of the jacking platform usually extends into the stable bottom layer below the ground. When the length of the steel box girder is long, the number of pile foundations required for the jacking platform is large, and a large number of pile foundations need to be piled one by one, which is time-consuming and labor-intensive, resulting in low construction efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a jacking platform for a steel box girder, aiming to solve the technical problem in the prior art that when the length of the steel box girder is long, a large number of pile foundations need to be set up on the jacking platform, and a large number of pile foundations need to be piled in sequence, which is time-consuming and labor-intensive, resulting in low construction efficiency.

[0005] To achieve the above-mentioned purpose, the utility model proposes a pushing platform for a steel box girder, comprising a plurality of pushing brackets and a plurality of assembling brackets, wherein the plurality of pushing brackets are distributed in an array, each of the pushing brackets comprises a frame structure and a pile structure supported below the frame structure, the frame structure comprises a transverse beam extending in the transverse direction, a longitudinal beam extending in the longitudinal direction and a plurality of pads arranged between the transverse beam and the longitudinal beam, the transverse beam and the longitudinal beam are both arranged horizontally, and the longitudinal beam is located above the transverse beam, the transverse beam is connected to the pile structure, and a pushing assembly for pushing the steel box girder is arranged on the longitudinal beam; the assembling bracket is arranged at intervals from the pushing bracket, and an assembling bracket is arranged between any two adjacent pushing brackets in a row, the assembling bracket comprises a plurality of columns extending in the vertical direction and a load-bearing structure connected to the tops of the plurality of columns, the plurality of columns are arranged at intervals in the transverse direction, and the load-bearing structure is supported below the steel box girder.

[0006] Optionally, the pile structure includes a plurality of steel pipe piles and a plurality of connecting beams, the plurality of steel pipe piles are arranged at intervals, the lower end of each of the steel pipe piles extends below the ground, the upper end of each of the steel pipe piles is connected to the cross beam, and at least one connecting beam is connected between any two adjacent steel pipe piles.

[0007] Optionally, the pile structure further includes a pile cap, through which the lower ends of the plurality of steel pipe piles are connected, and the pile cap is buried under the ground.

[0008] Optionally, the jacking assembly includes a jacking member, a propulsion member and a correcting member, the jacking member is connected to the middle part of the longitudinal beam and vertically supported below the steel box beam, the jacking member is used to lift or lower the steel box beam, the propulsion member is connected between the longitudinal beam and the steel box beam, the propulsion member is used to push the steel box beam to move after the jacking member lifts the steel box beam, and the correcting member is supported below the steel box beam and is used to adjust the horizontal position of the steel box beam.

[0009] Optionally, a pressure sensor is installed on the lifting member, and a displacement sensor is installed on the propulsion member.

[0010] Optionally, the load-bearing structure includes a first distribution beam, a second distribution beam, and a plurality of Bailey beams connected between the first distribution beam and the second distribution beam, the first distribution beam and the second distribution beam are both horizontally arranged and extend laterally, and the first distribution beam is spaced below the second distribution beam, the first distribution beam is connected to the tops of the plurality of columns, and the second distribution beam is supported by the steel box beam.

[0011] Optionally, a guide beam extending in the longitudinal direction is arranged on the top of the second distribution beam, and a traveling wheel capable of rolling cooperation with the guide beam is arranged on the bottom of the steel box beam.

[0012] Optionally, the column is a lattice column, and the lattice column is formed by splicing a plurality of steel sections.

[0013] Optionally, the cross beam and the longitudinal beam are both formed by horizontally splicing two box beams.

[0014] Optionally, the pushing platform also includes a platform plate, the top of each pile structure and the top of each column are located on the same horizontal plane, the platform plate is overlapped on the top of each pile structure and each column, and the platform plate is provided with avoidance openings corresponding to the positions of each pile structure and each column.

[0015] The jacking platform for steel box girders proposed in the utility model is provided with a plurality of jacking brackets distributed in an array below the steel box girder, and an assembly bracket is provided between any two adjacent jacking brackets in a row of jacking brackets, so that the plurality of jacking brackets and the plurality of assembly brackets jointly support the steel box girder. By providing a jacking assembly on the top of each jacking bracket, and extending the lower end of each jacking bracket into the stable stratum below the ground, each jacking bracket has sufficient stability, and when each jacking assembly performs jacking construction on the steel box girder, the jacking bracket can withstand the reaction force applied by the jacking assembly thereon. The lower end of each assembly bracket is directly provided on the ground, and is convenient to erect, so that each assembly bracket can be quickly erected while ensuring that it can provide sufficient support force for the steel box girder, saving time and effort, thereby effectively improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a top view schematic diagram of a jacking platform of a steel box girder in one embodiment of the utility model;

[0018] Figure 2 It is a side view schematic diagram of a jacking bracket of a jacking platform according to an embodiment of the utility model;

[0019] Figure 3 It is a side view schematic diagram of an assembly bracket of a jacking platform according to an embodiment of the utility model;

[0020] Figure 4 The utility model is a top view of a pushing bracket of a pushing platform according to an embodiment of the utility model.

[0021] Description of Figure Numbers:

[0022]

[0023]

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] In the present invention, the descriptions of directions such as "up", "down", "front", "back", "left", and "right" are as follows: Figure 1-Figure 4 The directions shown are for reference only and are used to explain the Figure 1-Figure 4 The relative position relationship between the components in the shown posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] The utility model provides a jacking platform for a steel box girder 40, including a plurality of jacking brackets 10 and a plurality of assembling brackets 20, wherein the plurality of jacking brackets 10 are arranged in an array, each jacking bracket 10 includes a frame structure 11 and a pile structure 12 supported below the frame structure 11, the frame structure 11 includes a transverse beam 111 extending in a transverse direction, a longitudinal beam 112 extending in a longitudinal direction, and a plurality of pads 113 arranged between the transverse beam 111 and the longitudinal beam 112, the transverse beam 111 and the longitudinal beam 112 are both arranged horizontally, and the longitudinal beam 112 is arranged horizontally. Above the cross beam 111, the cross beam 111 is connected to the pile structure 12, and a pushing assembly 13 for pushing the steel box girder 40 is arranged on the longitudinal beam 112; the assembling bracket 20 is arranged at intervals from the pushing bracket 10, and an assembling bracket 20 is arranged between any two adjacent pushing brackets 10 in a row, and the assembling bracket 20 includes a plurality of columns 21 extending vertically and a load-bearing structure 22 connected to the top of the plurality of columns 21, the plurality of columns 21 are arranged at intervals along the horizontal direction, and the load-bearing structure 22 is supported below the steel box girder 40.

[0031] like Figure 1-Figure 3 As shown, Figure 1-Figure 3 The front-to-back direction is the longitudinal direction, and the left-to-right direction is the transverse direction. The steel box beam 40 extends longitudinally, and a plurality of jacking brackets 10 are distributed in two rows. Two jacking brackets 10 in the same row are respectively supported on both sides of the steel box beam 40 in the transverse direction, and an assembly bracket 20 is arranged between any two adjacent jacking brackets 10 in the same row. Each jacking bracket 10 is supported below the steel box girder 40 by the jacking assembly 13 at the top thereof. The jacking assembly 13 is arranged on the longitudinal beam 112. The longitudinal beam 112 is erected on the cross beam 111 through a plurality of pads 113. The cross beam 111 is erected on the pile structure 12. The lower end of the pile structure 12 extends into the stable stratum below the ground. Each assembling bracket 20 is supported below the steel box girder 40 by the load-bearing structure 22 at the top thereof. The plurality of columns 21 supporting the load-bearing structure 22 are all supported on the ground after foundation treatment. When the plurality of jacking assemblies 13 jack-push the steel box girder 40 in the longitudinal direction, the steel box girder 40 slides with the top of each assembling bracket 20, so that when the steel box girder 40 moves relative to the jacking platform, the plurality of jacking brackets 10 and the plurality of assembling brackets 20 can provide sufficient support for the steel box girder 40.

[0032] The jacking platform of the steel box girder 40 proposed in the utility model is provided with a plurality of jacking brackets 10 distributed in an array below the steel box girder 40, and an assembly bracket 20 is provided between any two adjacent jacking brackets 10 in a row of jacking brackets 10, so that the plurality of jacking brackets 10 and the plurality of assembly brackets 20 jointly support the steel box girder 40. By providing a jacking assembly 13 on the top of each jacking bracket 10, and extending the lower end of each jacking bracket 10 into the stable stratum below the ground, each jacking bracket 10 has sufficient stability, and when each jacking assembly 13 performs jacking construction on the steel box girder 40, the jacking bracket 10 can withstand the reaction force applied by the jacking assembly 13 thereon. The lower end of each assembly bracket 20 is directly provided on the ground, and it is convenient to set up, so that each assembly bracket 20 can be set up quickly while ensuring that it can provide sufficient support force for the steel box girder 40, saving time and labor, thereby effectively improving construction efficiency.

[0033] In one embodiment, the pile structure 12 includes a plurality of steel pipe piles 121 and a plurality of connecting beams 122. The plurality of steel pipe piles 121 are arranged at intervals, the lower end of each steel pipe pile 121 extends below the ground, the upper end of each steel pipe pile 121 is connected to the cross beam 111, and at least one connecting beam 122 is connected between any two adjacent steel pipe piles 121.

[0034] It can be explained that the multiple steel pipe piles 121 are distributed in an array, the multiple steel pipe piles 121 in the same row are spaced laterally, and the tops of the steel pipe piles 121 in the same row are connected by a cross beam 111, and the tops of the multiple rows of steel pipe piles 121 are provided with multiple cross beams 111, and the longitudinal beams 112 are provided on the multiple cross beams 111. One or more connecting beams 122 are connected between two steel pipe piles 121 adjacent in the transverse, longitudinal or oblique direction, and the connecting beams 122 are located in the upper half of each steel pipe pile 121. The multiple steel pipe piles 121 become a spatial force-bearing structure under the connection of the connecting beams 122, which effectively enhances the force stability of the pile structure 12, so that the jacking bracket 10 can provide stable support for the steel box beam 40.

[0035] In one embodiment, the pile structure 12 further includes a pile cap 123 , and the lower ends of the plurality of steel pipe piles 121 are connected by the pile cap 123 , and the pile cap 123 is buried under the ground.

[0036] Furthermore, the lower ends of the plurality of steel pipe piles 121 are connected as a whole through the pile cap 123, and the pile cap 123 cooperates with the connecting beam 122 to connect the plurality of steel pipe piles 121 into an integral structure, further improving the stress stability of the pile structure 12. In addition, the pile cap 123 provides protection for the lower ends of the steel pipe piles 121, prevents rainwater from penetrating into the pile body, expands the pile body stress surface, reduces uneven settlement, thereby enhancing the bearing capacity of the steel pipe piles 121 and improving the bearing capacity of the pile structure 12.

[0037] In one embodiment, the jacking assembly 13 includes a jacking member 131, a propulsion member 132 and a correction member. The jacking member 131 is connected to the middle part of the longitudinal beam 112 and is vertically supported below the steel box beam 40. The jacking member 131 is used to lift or lower the steel box beam 40. The propulsion member 132 is connected between the longitudinal beam 112 and the steel box beam 40. The propulsion member 132 is used to push the steel box beam 40 to move after the jacking member 131 lifts the steel box beam 40. The correction member is supported below the steel box beam 40 and is used to adjust the horizontal position of the steel box beam 40.

[0038] It should be noted that each jacking support 10 is provided with a jacking assembly 13, wherein a jacking member 131 is vertically arranged and abuts against the bottom surface of the steel box girder 40; a pushing member 132 is obliquely arranged, one end of the pushing member 132 is connected to the longitudinal beam 112 and is located at the rear end of the jacking member 131, and the other end of the pushing member 132 is connected to the steel box girder 40, so that the steel box girder 40 is pushed forward under the action of the pushing member 132. The deviation correction member is used to adjust the lateral deviation of the steel box girder 40. The deviation correction member cooperates with the jacking member 131 and the pushing member 132 to adjust the steel box girder 40 in the lateral, vertical and longitudinal directions, respectively, and correct the jacking line shape of the steel box girder 40 to ensure the accuracy of the jacking direction of the steel box girder 40. The jacking member 131, the pushing member 132 and the deviation correction member can adopt equipment such as hydraulic jacks in the prior art.

[0039] In one embodiment, a pressure sensor is installed on the lifting member 131 , and a displacement sensor is installed on the pushing member 132 .

[0040] It can be understood that the pressure sensor is used to monitor the pressure exerted on each jacking component 131 from the steel box girder 40, ensuring that the pressure of the jacking components 131 at different positions is close to each other, thereby avoiding stress concentration in the steel box girder 40; the displacement sensor is used to monitor the jacking displacement of the steel box girder 40, and the signals of the pressure sensor and the displacement sensor are both connected to the external control device. The external control device controls the jacking assembly 13 according to the monitoring values ​​of the pressure sensor and the displacement sensor, so as to realize the automated control of the jacking construction of the steel box girder 40.

[0041] In one embodiment, the load-bearing structure 22 includes a first distribution beam 221, a second distribution beam 222, and a plurality of Bailey beams 223 connected between the first distribution beam 221 and the second distribution beam 222. The first distribution beam 221 and the second distribution beam 222 are both horizontally arranged and extend laterally, and the first distribution beam 221 is arranged at intervals below the second distribution beam 222. The first distribution beam 221 is connected to the tops of a plurality of columns 21, and the second distribution beam 222 is supported on the steel box beam 40.

[0042] It should be noted that multiple columns 21 are arranged at intervals in the horizontal direction, the first distribution beam 221 connects the tops of the multiple columns 21 into one, the second distribution beam 222 is connected to the first distribution beam 221 through multiple Bailey beams 223, the second distribution beam 222 transfers the dead weight of the steel box beam 40 to the first distribution beam 221, and the first distribution beam 221 then transfers it evenly to each column 21, the first distribution beam 221 and the second distribution beam 222 convert the single load applied by the steel box beam 40 into multiple uniform loads, so that the stress on each column 21 is as close as possible, avoiding stress concentration, and making full use of the force-bearing performance of a single column 21 to avoid material waste.

[0043] In one embodiment, a guide beam extending in the longitudinal direction is disposed on the top of the second distribution beam 222, and a running wheel capable of rolling with the guide beam is disposed on the bottom of the steel box beam 40.

[0044] Furthermore, the second distribution beams 222 extend laterally, and the multiple second distribution beams 222 on the top of the multiple assembly brackets 20 are provided with longitudinally extending guide beams, so that when the steel box beam 40 is pushed longitudinally, the running wheels at the bottom of the steel box beam 40 always maintain rolling cooperation with the guide beams. The guide beams provide support for the steel box beam 40 while facilitating the rapid pushing construction of the steel box beam 40.

[0045] In one embodiment, the column 21 is a lattice column 211 , and the lattice column 211 is formed by splicing a plurality of steel sections.

[0046] It can be understood that the lattice column 211 is directly erected on the ground and formed by splicing a plurality of steel sections on site, which is convenient to disassemble and fast in construction, thereby improving construction efficiency. In addition, since the lattice column 211 is conducive to material recycling and can be reused, construction costs can be saved.

[0047] In one embodiment, the cross beam 111 and the longitudinal beam 112 are both formed by horizontally splicing two box beams.

[0048] It can be understood that the two box beams are arranged side by side and connected into one by welding or bolts, so that the formed cross beam 111 and longitudinal beam 112 have strong bearing capacity and can withstand the pressure of the steel box beam 40. At the same time, the box beam is easy to connect and is conducive to on-site construction.

[0049] In one embodiment, the jacking platform also includes a platform plate 30, the top of each pile structure 12 and the top of each column 21 are located on the same horizontal plane, the platform plate 30 is overlapped on the top of each pile structure 12 and each column 21, and the platform plate 30 is provided with avoidance openings at the positions corresponding to each pile structure 12 and each column 21.

[0050] It should be noted that the avoidance opening opened at the top position of the platform plate 30 corresponding to the pile structure 12 facilitates the direct connection between the pile structure 12 and the frame structure 11, and the avoidance opening opened at the top of the corresponding column 21 facilitates the connection between the column 21 and the load-bearing structure 22. The platform plate 30 is erected on the top of the pile structure 12 and the frame structure 11 without affecting the pushing and supporting of the steel box girder 40 by the pushing bracket 10 and the assembling bracket 20, which is convenient for the operator to construct.

[0051] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A jacking platform for a steel box girder, characterized in that: include: A plurality of jacking brackets, wherein the plurality of jacking brackets are distributed in an array, each of the jacking brackets comprises a frame structure and a pile structure supported below the frame structure, the frame structure comprises a transverse beam extending in a transverse direction, a longitudinal beam extending in a longitudinal direction, and a plurality of pads arranged between the transverse beam and the longitudinal beam, the transverse beam and the longitudinal beam are both arranged horizontally, and the longitudinal beam is located above the transverse beam, the transverse beam is connected to the pile structure, and a jacking assembly for jacking the steel box beam is arranged on the longitudinal beam; A plurality of assembling brackets are arranged at intervals from the pushing brackets, and an assembling bracket is arranged between any two adjacent pushing brackets in a row, the assembling bracket comprises a plurality of columns extending vertically and a load-bearing structure connected to the tops of the plurality of columns, the plurality of columns are arranged at intervals in the horizontal direction, and the load-bearing structure is supported under the steel box girder.

2. The jacking platform for steel box beams according to claim 1, characterized in that: The pile structure includes a plurality of steel pipe piles and a plurality of connecting beams. The plurality of steel pipe piles are arranged at intervals, the lower end of each steel pipe pile extends below the ground, the upper end of each steel pipe pile is connected to the cross beam, and at least one connecting beam is connected between any two adjacent steel pipe piles.

3. The jacking platform for steel box beams according to claim 2, characterized in that: The pile structure further includes a pile cap, through which the lower ends of the plurality of steel pipe piles are connected, and the pile cap is buried under the ground.

4. The jacking platform for steel box beams according to claim 1, characterized in that: The jacking assembly includes a jacking member, a propulsion member and a deviation-correcting member. The jacking member is connected to the middle part of the longitudinal beam and vertically supported below the steel box beam. The jacking member is used to lift or lower the steel box beam. The propulsion member is connected between the longitudinal beam and the steel box beam. The propulsion member is used to push the steel box beam to move after the jacking member lifts the steel box beam. The deviation-correcting member is supported below the steel box beam and is used to adjust the horizontal position of the steel box beam.

5. The jacking platform for steel box beams according to claim 4, characterized in that: A pressure sensor is installed on the lifting member, and a displacement sensor is installed on the pushing member.

6. The jacking platform for a steel box girder according to any one of claims 1 to 5, characterized in that: The load-bearing structure includes a first distribution beam, a second distribution beam, and a plurality of Bailey beams connected between the first distribution beam and the second distribution beam. The first distribution beam and the second distribution beam are both horizontally arranged and extend laterally, and the first distribution beam is arranged below the second distribution beam at intervals. The first distribution beam is connected to the tops of the plurality of columns, and the second distribution beam is supported by the steel box beam.

7. The jacking platform for steel box beams according to claim 6, characterized in that: A guide beam extending in the longitudinal direction is arranged on the top of the second distribution beam, and a traveling wheel capable of rolling with the guide beam is arranged on the bottom of the steel box beam.

8. The jacking platform for steel box beams according to claim 6, characterized in that: The columns are lattice columns, and the lattice columns are formed by splicing a plurality of steel sections.

9. The jacking platform for a steel box girder according to any one of claims 1 to 5, characterized in that: The cross beam and the longitudinal beam are both formed by horizontally splicing two box beams.

10. The jacking platform for a steel box girder according to any one of claims 1 to 5, characterized in that: The pushing platform also includes a platform plate, the top of each pile structure and the top of each column are located on the same horizontal plane, the platform plate is overlapped on the top of each pile structure and each column, and the platform plate is provided with avoidance openings corresponding to the positions of each pile structure and each column.

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