Pedestal of prefabricated box girder and construction method

Abstract

The invention discloses a pedestal of a prefabricated box girder and a construction method, and belongs to the technical field of box girder manufacturing, the pedestal of the prefabricated box girder comprises a base and a splicing module, the splicing module comprises a wedge-shaped box and a plurality of bearing blocks, the upper end face of the wedge-shaped box is provided with a wedge-shaped groove, and the wedge-shaped box and the bearing blocks can be connected with or separated from the upper end of the base; when the wedge-shaped box and the multiple bearing blocks are all connected with the base, the wedge-shaped box and the multiple bearing blocks are all arranged in the length direction of the base and abut against each other, the upper end face of the wedge-shaped box and the upper end faces of the multiple bearing blocks jointly define a bearing face, the bearing face is used for bearing a box girder, and the prefabricated box girder manufacturing device can adapt to manufacturing of various prefabricated box girders; and the occupied scale and the cost investment of the prefabrication yard are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of box girder manufacturing, in particular to a pedestal and a construction method of a prefabricated box girder. Background Art

[0002] In highway projects, depending on the topography or the horizontal curve of the bridge, the design unit often uses unequal span prefabricated box girders in the upper design of the bridge.

[0003] In the related art, since the positions of the wedge blocks of prefabricated box girders of different lengths are different, the design unit needs to make prefabricated pedestals of different sizes, which increases the land area and cost investment of the prefabrication site. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pedestal for prefabricated box beams, which can be adapted to the manufacture of various prefabricated box beams and reduce the land area and cost of the prefabrication site.

[0005] The invention also provides a construction method.

[0006] According to the first aspect of the present invention, the pedestal of the prefabricated box girder comprises: a base; a splicing module, comprising a wedge-shaped box and a plurality of supporting blocks, the upper end surface of the wedge-shaped box is provided with a wedge-shaped groove, and the wedge-shaped box and the plurality of supporting blocks are both capable of being connected to or separated from the upper end of the base; when the wedge-shaped box and the plurality of supporting blocks are both connected to the base, the wedge-shaped box and the plurality of supporting blocks are arranged along the length direction of the base and abut against each other, the upper end surface of the wedge-shaped box and the upper end surfaces of the plurality of supporting blocks jointly define a supporting surface, and the supporting surface is used to support the box girder.

[0007] The pedestal of the prefabricated box beam according to the embodiment of the present invention has at least the following beneficial effects: the splicing module is connected to the upper end of the base, the base can provide support for the connection of the splicing module, the splicing module includes a wedge-shaped box and a plurality of supporting blocks, the wedge-shaped box and the plurality of supporting blocks can be connected to or separated from the upper end of the base, according to the length of the box beam and the position of the wedge-shaped block, the construction personnel can adjust the relative position relationship between the wedge-shaped box and the plurality of supporting blocks, that is, adjust the connection position of the wedge-shaped box on the base, and then connect the wedge-shaped box and the plurality of supporting blocks to the base. , so that the wedge box and the multiple supporting blocks are arranged along the length direction of the base, the wedge box and the multiple supporting blocks abut against each other, so that the upper end surface of the wedge box and the upper end surfaces of the multiple supporting blocks jointly define a supporting surface for supporting the base material of the box beam, the wedge groove at the upper end of the wedge box corresponds to the wedge block setting of the box beam, and the pedestal of the prefabricated box beam is adjusted through different splicing forms of the wedge box and the supporting blocks to adjust the connection position of the wedge box, which is conducive to adapting to the manufacture of prefabricated box beams of various specifications, and is conducive to reducing the floor space and cost investment of the prefabrication site.

[0008] According to some embodiments of the present invention, the splicing module also includes a disassembly block, which is detachably connected to the base along the width direction of the base, and the wedge box and a plurality of supporting blocks can be slidably connected to the base along the length direction of the base; when the disassembly block is connected to the base, the disassembly block can abut against the wedge box or the supporting block to limit the sliding of the wedge box and the supporting block relative to the base.

[0009] Considering that when the prefabricated box girder is tensioned, the tensioning force causes the box girder to arch upward, resulting in compression at both ends of the girder body, and at the same time, the lateral friction force of the wedge-shaped block at the bottom of the box girder causes the beam end to be squeezed. Under the action of these two main reasons, common quality defects such as splitting occur under the anchor of the box girder and at the beam end. The splicing module of the pedestal of the prefabricated box girder also includes a disassembly block, which is detachably connected to the base along the width direction of the base. When the disassembly block is connected to the base, the disassembly block can abut against the wedge box or the supporting block to limit the sliding of the wedge box and the supporting block relative to the base, that is, to fix the wedge box and the supporting block relative to the base. Position relationship, the disassembly block, the wedge box and the supporting block can jointly support the box girder to realize the prefabrication of the box girder. After the prefabrication of the box girder is completed, the construction personnel can move the disassembly block along the width direction of the base to separate the disassembly block from the base. The pressure of the disassembly block on the wedge box or the supporting block is eliminated, and space is provided for the sliding of the wedge box and the supporting block. When the box girder is tensioned, the wedge box and the supporting block can slide with the movement of the box girder, which is beneficial to avoid common quality defects such as local splitting at the end of the prefabricated box girder caused by excessive friction between structures, and is beneficial to improving the production quality of the box girder.

[0010] According to some embodiments of the present invention, the splicing module further includes a sliding pad connected to the upper end of the base, and the wedge box and the plurality of supporting blocks can be slidably connected to the sliding pad.

[0011] Specifically, the splicing module also includes a sliding pad, which is connected to the upper end of the base, and the wedge box and multiple supporting blocks are located at the upper end of the sliding pad, and the wedge box and multiple supporting blocks can be slidingly connected to the sliding pad. The pedestal of the prefabricated box girder is slidingly connected to the sliding pad through the wedge box and multiple supporting blocks. Before prefabrication of the box girder, the supporting blocks can be easily removed and the sliding connection between the wedge box and the supporting blocks can be coordinated to adjust the relative position relationship between the wedge box and the multiple supporting blocks to meet the prefabrication requirements of the wedge blocks of the box girder at different positions. After prefabrication is completed, the disassembly and assembly blocks are removed to make the wedge box and the multiple supporting blocks slide relative to the sliding pad as a whole, so as to avoid common quality defects such as local splitting at the end of the prefabricated box girder due to excessive friction between the structures during the tensioning process. The provision of the sliding pad is beneficial to improving the sliding smoothness of the wedge box and the supporting blocks.

[0012] According to some embodiments of the present invention, the sliding pad is a polytetrafluoroethylene pad.

[0013] Specifically, the sliding pad is a polytetrafluoroethylene pad. Since the polytetrafluoroethylene pad has the advantages of low friction coefficient, wear resistance, corrosion stability, high and low temperature resistance, dimensional stability, etc., the base of the prefabricated box beam uses a polytetrafluoroethylene pad as a sliding pad, which can effectively improve the sliding smoothness of the wedge box and the supporting block, which is beneficial to improving the durability of the base of the prefabricated box beam.

[0014] According to some embodiments of the present invention, the splicing module includes at least three supporting blocks, the width direction of the supporting blocks is consistent with the length direction of the base, the three supporting blocks are respectively a first sub-block, a second sub-block and a third sub-block, and the widths of the first sub-block, the second sub-block and the third sub-block increase sequentially.

[0015] Specifically, in a splicing module, the splicing module includes at least three supporting blocks, which are respectively named the first sub-block, the second sub-block and the third sub-block, and the width direction of the supporting blocks is consistent with the length direction of the base, and the widths of the first sub-block, the second sub-block and the third sub-block increase successively. By adjusting the arrangement and combination of the wedge box and the first sub-block, the second sub-block and the third sub-block, it can adapt to the manufacturing requirements of the wedge blocks of more types of box girders being located in different positions, so as to improve the applicability of the pedestal of the prefabricated box girder to different types of prefabricated box girders.

[0016] According to some embodiments of the present invention, the wedge-shaped box includes a box body, an end plate and a threaded connector, the box body is connected to the base, a wedge-shaped groove is provided on the end plate, one end of the threaded connector is connected to one of the box body and the end plate, and the other end is connected to another thread, and the end plate can be raised and lowered relative to the box body.

[0017] Specifically, the wedge box includes a box body, an end plate and a threaded connector, the box body is connected to the base, one end of the threaded connector is connected to one of the box body and the end plate, and the other end is connected to the other thread of the box body and the end plate. By changing the screwing position of the threaded connector and the box body or the end plate, the box body and the end plate can be driven to move closer to or away from each other, that is, the end plate can be lifted or lowered. The wedge groove is located at the upper end of the end plate. By changing the height of the end plate, the forming height of the wedge block on the box beam is changed, and it can adapt to the different position requirements of the wedge blocks of more types of box beams, so as to improve the applicability of the pedestal of the prefabricated box beam to the prefabrication of different types of box beams.

[0018] According to some embodiments of the present invention, the pedestal of the prefabricated box girder also includes a plurality of fixed blocks, the base is provided with a plurality of fixed sections and a plurality of sliding sections arranged in an alternating manner, the sliding sections correspond one-to-one to the splicing modules, the splicing modules are arranged in the sliding sections, the fixed sections correspond one-to-one to the fixed blocks, and the fixed blocks are connected to the base and arranged in the fixed sections.

[0019] Specifically, in order to meet the prefabrication of the entire box girder and the forming requirements of multiple wedge blocks, the pedestal of the prefabricated box girder also includes a fixed block, and the base is provided with multiple fixed sections and multiple sliding sections arranged in an alternating manner, and the fixed sections correspond one-to-one to the fixed blocks, the fixed blocks are connected to the base and are arranged in the fixed sections, the sliding sections correspond one-to-one to the splicing modules, and the splicing modules are arranged in the sliding sections. Multiple fixed blocks and multiple splicing modules are used together to support the box girder to realize the prefabrication of the box girder. By changing the relative position relationship between the wedge boxes and the multiple supporting blocks in the multiple splicing modules, the forming requirements of the multiple wedge blocks on the box girder can be met, and the different position requirements of the wedge blocks of more types of box girders can be adapted to improve the applicability of the pedestal of the prefabricated box girder to the prefabrication of different types of box girders.

[0020] According to the second aspect of the present invention, the construction method includes the pedestal of the prefabricated box beam shown in the first aspect; the construction method includes:

[0021] Level the construction site, arrange steel bars, and pour concrete to obtain the foundation;

[0022] According to the position of the wedge block on the box beam, the relative position relationship between the wedge box and the plurality of supporting blocks is adjusted, and the wedge box and the plurality of supporting blocks are connected to the upper end of the base;

[0023] The base material of the box beam is placed on the supporting surface, and the box beam is prefabricated and tensioned.

[0024] The construction method according to the embodiment of the present invention has at least the following beneficial effects: the construction personnel can first level the construction site, and obtain the base by arranging steel bars and pouring concrete, that is, the base is a combination of steel bars and concrete, which is conducive to improving the supporting performance of the base, and the relative position relationship between the wedge box and the plurality of supporting blocks can be adjusted according to the preset position of the wedge block on the box beam and the length of the box beam, and then the wedge box and the plurality of supporting blocks are connected to the upper end of the base, so that the wedge box and the plurality of supporting blocks are arranged along the length direction of the base. The wedge-shaped box and the plurality of supporting blocks are arranged so as to abut against each other, so that the upper end surface of the wedge-shaped box and the upper end surfaces of the plurality of supporting blocks jointly define a supporting surface for supporting the box beam, and then the base material of the box beam is placed on the supporting surface to facilitate prefabrication and tensioning of the box beam, and the wedge-shaped groove at the upper end of the wedge-shaped box corresponds to the wedge-shaped block of the box beam. The construction method adjusts the connection position of the wedge-shaped box through different splicing forms of the wedge-shaped box and the supporting blocks, which is conducive to adapting to the manufacture of prefabricated box beams of various specifications and is conducive to reducing the floor space and cost investment of the prefabrication site.

[0025] According to some embodiments of the present invention, the splicing module further includes a disassembly block, which is detachably connected to the base along the width direction of the base, and the wedge box and the plurality of supporting blocks are slidably connected to the base along the length direction of the base;

[0026] The base material of the box beam is placed on the supporting surface, and the box beam is prefabricated and tensioned, including:

[0027] Connect the disassembly block to the upper end of the base so that the disassembly block limits the sliding of the wedge box and the supporting block relative to the base;

[0028] The base material of the box beam is placed on the upper end of the disassembly block, the wedge box and the plurality of supporting blocks to prefabricate the box beam;

[0029] After the prefabrication of the box beam is completed, the disassembly block is separated from the base along the width direction of the base, so that the wedge box and the supporting block can slide along the length direction of the base;

[0030] The box girder is tensioned.

[0031] Specifically, the splicing module also includes a disassembly block. When the construction method places the base material of the box beam on the supporting surface and performs the steps of prefabrication and tensioning of the box beam, the disassembly block can be first connected to the upper end of the base, and the disassembly block can abut against the wedge box or the supporting block to limit the sliding of the wedge box and the supporting block relative to the base, that is, fix the relative position relationship between the wedge box and the supporting block and the base, and the disassembly block, the wedge box and the supporting block can jointly support the base material of the box beam to realize the prefabrication of the box beam. After the prefabrication of the box beam is completed, the construction personnel can move the disassembly block along the width direction of the base to separate the disassembly block from the base, eliminate the pressure of the disassembly block on the wedge box or the supporting block, and provide space for the sliding of the wedge box and the supporting block. When the box beam is tensioned, the wedge box and the supporting block can slide with the movement of the box beam, which is beneficial to avoid the common quality defects such as local splitting at the end of the prefabricated box beam caused by excessive friction between the structures, and is beneficial to improve the production quality of the box beam.

[0032] According to some embodiments of the present invention, the splicing module further includes a sliding pad;

[0033] Connect a wedge-shaped box and a plurality of support blocks to the upper end of the base, including:

[0034] Connect the sliding pad to a preset position on the upper end of the base;

[0035] The wedge box and the plurality of supporting blocks are all slidably connected to the upper end of the sliding pad.

[0036] Specifically, the splicing module also includes a sliding pad. In the step of connecting the wedge-shaped box and the plurality of supporting blocks to the upper end of the base, the construction method can first connect the sliding pad to the upper end of the base, and the wedge-shaped box and the plurality of supporting blocks are located at the upper end of the sliding pad, so that the wedge-shaped box and the plurality of supporting blocks can be slidingly connected to the sliding pad. The pedestal of the prefabricated box beam is slidingly connected to the sliding pad through the wedge-shaped box and the plurality of supporting blocks. Before the box beam is prefabricated, the supporting blocks can be removed conveniently to cooperate with the wedge The wedge box and the supporting block are connected by sliding connection, so as to adjust the relative position relationship between the wedge box and the multiple supporting blocks to meet the prefabrication requirements of the wedge blocks of the box beam at different positions. After the prefabrication is completed, the disassembly block is removed to make the wedge box and the multiple supporting blocks slide relative to the sliding pad as a whole, so as to avoid common quality defects such as local splitting at the end of the prefabricated box beam due to excessive friction between the structures during the tensioning process. The setting of the sliding pad is conducive to improving the sliding smoothness of the wedge box and the supporting block.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0039] Figure 1 A schematic structural diagram of a pedestal for a prefabricated box girder according to an embodiment of the present invention;

[0040] Figure 2 A schematic structural diagram of a splicing module of a pedestal of a prefabricated box beam according to an embodiment of the present invention;

[0041] Figure 3 for Figure 2 A front view of a splicing module of a pedestal of a prefabricated box beam shown in FIG.

[0042] Figure 4 for Figure 2 A vertical sectional view of a splicing module of a pedestal of a prefabricated box beam shown in FIG.

[0043] Figure 5 This is a schematic diagram of the structure of the connection between the disassembly and assembly blocks of the pedestal of the prefabricated box beam according to an embodiment of the present invention and the base;

[0044] Figure 6 It is a schematic structural diagram of the separation of the disassembly block and the base of the pedestal of the prefabricated box beam according to an embodiment of the present invention;

[0045] Figure 7 A flowchart of a construction method according to an embodiment of the present invention;

[0046] Figure 8A flow chart of tensioning a box girder using a construction method according to an embodiment of the present invention;

[0047] Fig. 9 The present invention is a flowchart of assembling a splicing module according to a construction method of an embodiment of the present invention.

[0048] Figure Number:

[0049] 100, base; 110, sliding section; 120, fixed section;

[0050] 200, splicing module; 210, wedge-shaped box; 211, box body; 212, end plate; 2121, wedge-shaped groove; 213, threaded connector; 214, connector seat; 220, supporting block; 221, first sub-block; 222, second sub-block; 223, third sub-block; 230, disassembly block; 240, sliding pad;

[0051] 300. Fixed block. DETAILED DESCRIPTION

[0052] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0053] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0055] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0056] Reference Figures 1 to 6 As shown, a pedestal for a prefabricated box beam according to an embodiment of the present invention includes: a base 100 and a splicing module 200 .

[0057] Reference Figure 1 , Figure 2 and Figure 3 As shown, the base 100 is obtained by configuring steel bars and pouring concrete, that is, the base 100 is a combination of steel bars and concrete, which is conducive to improving the bearing performance of the base 100 and the manufacturing cost is relatively low. The base 100 can provide support for the splicing module 200.

[0058] Reference Figure 1 , Figure 2 and Figure 3 As shown, the splicing module 200 includes a wedge-shaped box 210 and a plurality of supporting blocks 220 . A wedge-shaped groove 2121 is provided at the upper end surface of the wedge-shaped box 210 . The wedge-shaped box 210 and the plurality of supporting blocks 220 can be connected to or separated from the upper end of the base 100 .

[0059] Reference Figure 1 , Figure 2 and Figure 3 As shown, according to the length of the box beam and the position of the wedge block, the construction personnel can adjust the relative position relationship between the wedge box 210 and the multiple supporting blocks 220, that is, adjust the connection position of the wedge box 210 on the base 100, and then connect the wedge box 210 and the multiple supporting blocks 220 to the base 100, so that the wedge box 210 and the multiple supporting blocks 220 are arranged along the length direction of the base 100.

[0060] Reference Figure 1 , Figure 2 and Figure 3 As shown, the wedge box 210 and the plurality of supporting blocks 220 are abutted against each other so that the upper end surface of the wedge box 210 and the upper end surfaces of the plurality of supporting blocks 220 jointly define a supporting surface for supporting the base material of the box beam, and the wedge groove 2121 at the upper end of the wedge box 210 corresponds to the wedge block of the box beam. The pedestal of the prefabricated box beam is configured by different splicing forms of the wedge box 210 and the supporting blocks 220 to adjust the connection position of the wedge box 210, which is conducive to adapting to the manufacture of prefabricated box beams of various specifications and is conducive to reducing the floor space and cost investment of the prefabrication site.

[0061] Reference Figure 1 , Figure 2 and Figure 3 As shown, compared with the traditional pedestal that can only correspond to the production of one type of prefabricated box girder, the pedestal for the prefabricated box girder provided by the embodiment of the present invention can meet the production requirements of various prefabricated box girders through different splicing methods of the splicing module 200, which is beneficial to reduce the number of pedestals arranged and to reduce the floor space specifications and cost investment of the prefabrication site.

[0062] Reference Figure 1 , Figure 2 and Figure 3As shown, it is understandable that when the wedge box 210 and the plurality of supporting blocks 220 are connected to the upper end of the base 100 , the wedge box 210 and the plurality of supporting blocks 220 can be slidably connected to the base 100 along the length direction of the base 100 .

[0063] Reference Figure 1 , Figure 2 and Figure 3 As shown, the construction personnel can separate one of the supporting blocks 220 from the base 100, and then conveniently adjust the connection position of the wedge box 210 on the base 100 by sliding the wedge box 210 and the multiple supporting blocks 220. After adjusting the wedge box 210 to the preset position, the separated supporting block 220 can be connected to the base 100 again, so that the wedge box 210 and the multiple supporting blocks 220 abut against each other, limiting the sliding of the wedge box 210 relative to the base 100. The wedge box 210 and the multiple supporting blocks 220 jointly define a supporting surface for supporting the base material of the box beam. During the prefabrication process of the box beam, a wedge block can be formed at the box beam corresponding to the wedge groove 2121 by pouring concrete.

[0064] Reference Figure 1 , Figure 2 and Figure 3 As shown, the pedestal of the prefabricated box beam is slidably matched with the base 100 through a wedge box 210 and a plurality of supporting blocks 220. The position of the wedge box 210 can be conveniently adjusted by dragging the wedge box 210 along the length direction of the base 100 without disassembling the wedge box 210, which is beneficial to improving the efficiency of the position adjustment of the wedge box 210 to adapt to various box beam lengths and wedge block forming requirements.

[0065] It should be understood that in some other embodiments, the wedge box 210 and the supporting block 220 can be detachably connected to the base 100 through connectors such as buckles and bolts. The pedestal of the prefabricated box beam can be disassembled and assembled with the base 100 through the wedge box 210 and the plurality of supporting blocks 220, and the position of the wedge box 210 can be adjusted along the length direction of the base 100 to adapt to the length of various box beams and the molding requirements of the wedge blocks.

[0066] Reference Figure 1 , Figure 2 and Figure 3 As shown, it can be understood that in this embodiment, the splicing module 200 includes at least three supporting blocks 220, the width direction of the supporting blocks 220 is consistent with the length direction of the base 100, and the three supporting blocks 220 are respectively the first sub-block 221, the second sub-block 222 and the third sub-block 223, and the widths of the first sub-block 221, the second sub-block 222 and the third sub-block 223 increase successively.

[0067] Reference Figure 1 , Figure 2 and Figure 3 As shown, construction workers can adapt to the different position requirements of the wedge blocks of more types of box girders by adjusting the arrangement and combination of the wedge box 210 and the first sub-block 221, the second sub-block 222 and the third sub-block 223, so as to improve the applicability of the pedestal of the prefabricated box girder to the prefabrication of different types of box girders.

[0068] Reference Figure 1 , Figure 2 and Figure 3 As shown, for example, the length and thickness of the first sub-block 221, the length and thickness of the second sub-block 222 and the length and thickness of the third sub-block 223 are all consistent, the width of the first sub-block 221 can be 100 mm, the width of the second sub-block 222 can be 200 mm, and the width of the third sub-block 223 can be 300 mm. By adjusting the relative relationship between the wedge-shaped box 210 and the combination of the first sub-block 221, the second sub-block 222 and the third sub-block 223, the position of the wedge-shaped box 210 in the length direction of the base 100 can be changed, and the adjustment is more flexible.

[0069] Reference Figure 1 , Figure 2 and Figure 3 As shown, specifically, the pedestal of the prefabricated box beam may include two first sub-blocks 221, two second sub-blocks 222 and two third sub-blocks 223. By adjusting the relative relationship between the combination of the wedge-shaped box 210 and the two first sub-blocks 221, the two second sub-blocks 222 and the two third sub-blocks 223, the flexibility of adjusting the position of the wedge-shaped box 210 in the length direction of the base 100 can be further improved.

[0070] Reference Figure 2 , Figure 5 and Figure 6 As shown, it is understandable that, considering that when the prefabricated box girder is tensioned, the tensioning force causes the box girder to arch upward, resulting in compression at both ends of the beam body, and at the same time, the lateral friction force of the wedge-shaped block at the bottom of the box girder causes the beam end to be squeezed. Under the action of these two main reasons, common quality defects such as splitting occur under the anchor and at the beam end of the box girder. The splicing module 200 also includes a disassembly block 230, which is detachably connected to the base 100 along the width direction of the base 100.

[0071] Reference Figure 2 , Figure 5 and Figure 6 As shown, when the disassembly block 230 is connected to the base 100, the disassembly block 230 can abut against the wedge box 210 or the supporting block 220 to limit the sliding of the wedge box 210 and the supporting block 220 relative to the base 100, that is, fix the relative position relationship between the wedge box 210 and the supporting block 220 and the base 100.

[0072] Reference Figure 2 , Figure 5 and Figure 6As shown, the disassembly block 230, the wedge box 210 and the supporting block 220 can jointly support the base material of the box beam to realize the prefabrication of the box beam. After the prefabrication of the box beam is completed, the construction personnel can move the disassembly block 230 along the width direction of the base 100, so as to separate the disassembly block 230 from the base 100. The pressure of the disassembly block 230 on the wedge box 210 or the supporting block 220 is eliminated, and space is provided for the sliding of the wedge box 210 and the supporting block 220. When the box beam is tensioned, the wedge box 210 and the supporting block 220 can slide with the movement of the box beam, which is beneficial to avoid the common quality defects such as local splitting at the end of the prefabricated box beam caused by excessive friction between the structures, and is beneficial to improve the production quality of the box beam.

[0073] Reference Figure 2 , Figure 5 and Figure 6 As shown, the pedestal of the prefabricated box beam is separated from the base 100 by the disassembly block 230, which can provide space for the sliding of the wedge box 210 and the supporting block 220, and provide a hanging point for the crane. The hanging cable can pass through the space formed after the disassembly of the disassembly block 230, so that the hanging cable can bypass the lower end of the box beam.

[0074] Reference Figure 2 , Figure 5 and Figure 6 As shown, it can be understood that, specifically, the splicing module 200 also includes a sliding pad 240, which is connected to the upper end of the base 100, and the wedge box 210 and the plurality of supporting blocks 220 are located at the upper end of the sliding pad 240, so that the wedge box 210 and the plurality of supporting blocks 220 can be slidably connected to the sliding pad 240.

[0075] Reference Figure 2 , Figure 4 and Figure 6 As shown, the pedestal of the prefabricated box girder is connected to the sliding pad 240 through the wedge box 210 and multiple supporting blocks 220. Before the box girder is prefabricated, the supporting block 220 can be easily removed to cooperate with the sliding connection between the wedge box 210 and the supporting block 220, so as to adjust the relative position relationship between the wedge box 210 and the multiple supporting blocks 220 to meet the prefabrication requirements of the wedge blocks of the box girder at different positions. After the prefabrication is completed, the disassembly block 230 is removed to make the wedge box 210 and the multiple supporting blocks 220 slide relative to the sliding pad 240 as a whole, so as to avoid the common quality defects such as local splitting at the end of the prefabricated box girder due to excessive friction between the structures during the tensioning process. The setting of the sliding pad 240 is conducive to improving the sliding smoothness of the wedge box 210 and the supporting block 220.

[0076] Reference Figure 2 , Figure 4 and Figure 6As shown, specifically, a sliding groove is provided at the upper end of the base 100. During construction, the construction workers can lay the sliding pad 240 in the sliding groove. The lower ends of the wedge box 210 and the multiple supporting blocks 220 are provided with a card block, which is embedded in the sliding groove and slidably connected with the sliding groove, thereby realizing the sliding connection between the wedge box 210 and the multiple supporting blocks 220 and the sliding pad 240, and the disassembly and assembly of the wedge box 210 and the multiple supporting blocks 220 is simpler and more convenient.

[0077] Reference Figure 2 , Figure 4 and Figure 6 As shown, it can be understood that the sliding pad 240 is a polytetrafluoroethylene pad. Since the polytetrafluoroethylene pad has the advantages of low friction coefficient, wear resistance, corrosion stability, high and low temperature resistance, dimensional stability, etc., the base of the prefabricated box beam adopts a polytetrafluoroethylene pad as the sliding pad 240, which can effectively improve the sliding smoothness of the wedge box 210 and the supporting block 220, which is beneficial to improving the durability of the base of the prefabricated box beam.

[0078] It should be understood that in some other embodiments, the sliding pad 240 may be a sliding substrate such as polytetrafluoroethylene propylene, graphite, etc., which can effectively improve the sliding smoothness of the wedge box 210 and the supporting block 220, which is beneficial to improving the durability of the base of the prefabricated box beam.

[0079] Reference Figure 2 , Figure 3 and Figure 4 As shown, it can be understood that, in this embodiment, the wedge-shaped box 210 includes a box body 211, an end plate 212 and a threaded connector 213, the end plate 212 and the box body 211 are arranged up and down, the box body 211 is connected to the base 100, the wedge-shaped groove 2121 is provided on the end plate 212, one end of the threaded connector 213 is connected to one of the box body 211 and the end plate 212, and the other end is connected to the other thread of the box body 211 and the end plate 212, and the end plate 212 can be raised and lowered relative to the box body 211.

[0080] Reference Figure 2 , Figure 3 and Figure 4 As shown, the construction personnel can drive the box body 211 and the end plate 212 to move closer to or farther away from each other by changing the screwing length of the threaded connector 213 and the box body 211 or the end plate 212, that is, the lifting and lowering of the end plate 212 is realized. The wedge-shaped groove 2121 is located at the upper end of the end plate 212. By changing the height of the end plate 212 and the wedge-shaped groove 2121, the forming height of the wedge block on the box beam is changed, which can adapt to the different position requirements of the wedge blocks of more types of box beams, so as to improve the applicability of the pedestal of the prefabricated box beam to the prefabrication of different types of box beams.

[0081] Reference Figure 2 , Figure 3 and Figure 4 As shown, it can be understood that, specifically, the box body 211 and the end plate 212 jointly define an operating space, a connecting seat 214 is provided at the upper end surface of the end plate 212, the connecting seat 214 is located in the operating space, the connecting seat 214 is provided with a screw hole with an opening facing upward, the upper end of the threaded connector 213 is rotatably connected to the end plate 212, and the lower end of the threaded connector 213 is threadedly connected to the screw hole of the connecting seat 214, the threaded connector 213 can be a bolt, and by rotating the threaded connector 213, the screwing length of the threaded connector 213 and the screw hole can be changed, thereby driving the end plate 212 to rise and fall relative to the box body 211.

[0082] Reference Figure 2 , Figure 3 and Figure 4 As shown, an operation port is connected to the side of the operation space, and construction personnel can pass tools through the operation port into the operation space to drive the threaded connector 213 to rotate forward or reverse, thereby driving the end plate 212 to rise and fall relative to the box body 211.

[0083] Reference Figure 1 , Figure 2 and Figure 6 As shown, it can be understood that the pedestal of the prefabricated box girder also includes a plurality of fixed blocks 300, the base 100 is provided with a plurality of fixed sections 120 and a plurality of sliding sections 110 arranged in a staggered manner, the plurality of fixed sections 120 and the plurality of sliding sections 110 are arranged along the length direction of the base 100, the sliding sections 110 correspond one-to-one to the splicing modules 200, the splicing modules 200 are arranged on the sliding sections 110, the fixed sections 120 correspond one-to-one to the fixed blocks 300, and the fixed blocks 300 are connected to the base 100 and are arranged on the fixed sections 120.

[0084] Reference Figure 1 , Figure 2 and Figure 6 As shown, specifically, in order to meet the requirements of prefabrication of the entire box beam and forming of multiple wedge blocks, the pedestal of the prefabricated box beam also includes a fixed block 300, and the base 100 is provided with a plurality of fixed sections 120 and a plurality of sliding sections 110 arranged in an alternating manner, and the fixed sections 120 correspond one-to-one to the fixed blocks 300, the fixed blocks 300 are connected to the base 100 and are arranged in the fixed sections 120, and the sliding sections 110 correspond one-to-one to the splicing modules 200, and the splicing modules 200 are arranged in the sliding sections 110.

[0085] Multiple fixed blocks 300 and multiple splicing modules 200 are used together to support the box girder to achieve prefabrication of the box girder. By changing the relative position relationship between the wedge boxes 210 and the multiple supporting blocks 220 in the multiple splicing modules 200, the molding requirements of the multiple wedge blocks on the box girder can be met, and the different position requirements of the wedge blocks of more types of box girders can be adapted to improve the applicability of the pedestal of the prefabricated box girder to the prefabrication of different types of box girders.

[0086] It should be noted that the fixing block 300 , the wedge-shaped box 210 and the supporting block 220 may be steel-shaped parts to support the base material of the box beam.

[0087] Reference Figure 1 , Figure 2 and Figure 6 As shown, it can be understood that the base 100 of the pedestal of the prefabricated box beam is divided into five sections, among which two sections at the edges and one section in the middle are fixed sections 120, and the remaining two sections are sliding sections 110, that is, the sliding section 110 is sandwiched between two fixed sections 120.

[0088] Reference Figure 1 , Figure 2 and Figure 6 As shown, the pedestal of the prefabricated box beam is a double-layer structure of a fixed block 300 and a base 100 at the fixed section 120. The fixed block 300 can be a steel structure and is fixedly connected to the base 100 by high-strength bolts.

[0089] Reference Figure 1 , Figure 2 and Figure 6 As shown, the pedestal of the prefabricated box beam is a three-layer structure at the sliding section 110, wherein the wedge box 210 and a plurality of supporting blocks 220 are the upper structure, the sliding pad 240 is the middle structure, the base 100 is the lower structure, and the upper structure is formed by slidingly splicing multiple sections. The length of the prefabricated box beam is adjusted by changing the width and assembly method of the supporting block 220 or the wedge box 210. According to the needs on site, the construction personnel adjust the height of the wedge box 210 by rotating the threaded connector 213, that is, changing the height of the wedge block of the formed box beam.

[0090] Reference Figures 7 to 9 As shown, a construction method of an embodiment of the present invention includes a pedestal of the prefabricated box beam shown in the above embodiment; the construction method includes the following steps:

[0091] Step S100, leveling the construction site, arranging steel bars, and pouring concrete to obtain the base 100;

[0092] Step S200, adjusting the relative position relationship between the wedge box 210 and the plurality of supporting blocks 220 according to the position of the wedge block on the box beam, and connecting the wedge box 210 and the plurality of supporting blocks 220 to the upper end of the base 100;

[0093] Step S300, placing the base material of the box beam on the supporting surface, and prefabricating and tensioning the box beam.

[0094] Reference Figure 1 , Figure 2 and Figure 7As shown, in step S100 , the construction workers may first level the construction site, and obtain the base 100 by arranging steel bars and pouring concrete, that is, the base 100 is a combination of steel bars and concrete, which is beneficial to improving the supporting performance of the base 100 .

[0095] Reference Figure 1 , Figure 2 and Figure 7 As shown, in step S200, the construction personnel can adjust the relative position relationship between the wedge box 210 and the multiple supporting blocks 220 according to the preset wedge block position of the box beam and the length of the box beam, and then connect the wedge box 210 and the multiple supporting blocks 220 to the upper end of the base 100, so that the wedge box 210 and the multiple supporting blocks 220 are arranged along the length direction of the base 100, and the wedge box 210 and the multiple supporting blocks 220 abut against each other, so that the upper end surface of the wedge box 210 and the upper end surfaces of the multiple supporting blocks 220 jointly define a supporting surface for supporting the box beam.

[0096] Reference Figure 1 , Figure 2 and Figure 7 As shown, in step S300, the construction personnel can place the base material of the box beam on the supporting surface to facilitate the prefabrication and tensioning of the box beam. The wedge groove 2121 at the upper end of the wedge box 210 corresponds to the wedge block of the box beam. The construction method adjusts the connection position of the wedge box 210 through different splicing forms of the wedge box 210 and the supporting block 220, which is conducive to adapting to the manufacture of prefabricated box beams of various specifications and reducing the floor space and cost investment of the prefabrication site.

[0097] Reference Figure 1 , Figure 2 and Figure 7 As shown, it should be noted that the base material of the box girder can be a combination of steel bars.

[0098] Reference Figure 1 , Figure 2 and Figure 7 As shown, compared with the traditional pedestal that can only correspond to one method of manufacturing prefabricated box girders, the construction method provided in the embodiment of the present invention can meet the production requirements of various prefabricated box girders through different splicing methods of the splicing module 200, which is beneficial to reducing the number of pedestals to be arranged and to reducing the floor space specifications and cost investment of the prefabrication site.

[0099] Reference Figure 5 , Figure 6 and Figure 8 As shown, it can be understood that the splicing module 200 further includes a disassembly block 230, which is detachably connected to the base 100 along the width direction of the base 100, and the wedge box 210 and the plurality of supporting blocks 220 can be slidably connected to the base 100 along the length direction of the base 100;

[0100] Reference Figure 5 , Figure 6 and Figure 8 As shown, in step S300, the construction method places the base material of the box beam on the supporting surface, and prefabricates and tensions the box beam, including the following steps:

[0101] Step S310, connecting the disassembly block 230 to the upper end of the base 100, so that the disassembly block 230 limits the sliding of the wedge box 210 and the supporting block 220 relative to the base 100;

[0102] Step S320, placing the base material of the box beam on the upper ends of the disassembly block 230, the wedge box 210 and the plurality of supporting blocks 220, and prefabricating the box beam;

[0103] Step S330, after the prefabrication of the box beam is completed, the disassembly block 230 is separated from the base 100 along the width direction of the base 100, so that the wedge box 210 and the supporting block 220 can slide along the length direction of the base 100;

[0104] Step S340, tensioning the box girder.

[0105] Reference Figure 5 , Figure 6 and Figure 8 As shown, in step S310, when the construction method places the base material of the box beam on the supporting surface and performs the steps of prefabrication and tensioning of the box beam, the disassembly block 230 can be first connected to the upper end of the base 100, and the disassembly block 230 can abut against the wedge box 210 or the supporting block 220 to limit the sliding of the wedge box 210 and the supporting block 220 relative to the base 100, that is, fix the relative position relationship between the wedge box 210 and the supporting block 220 and the base 100, and the disassembly block 230, the wedge box 210 and the supporting block 220 can jointly support the base material of the box beam to prepare for the prefabrication of the box beam.

[0106] Reference Figure 5 , Figure 6 and Figure 8 As shown, in step S320, the construction workers can place the base material of the box beam on the upper end of the disassembly block 230, the wedge box 210 and the multiple supporting blocks 220. The disassembly block 230, the wedge box 210 and the multiple supporting blocks 220 can jointly provide support for the base material of the box beam, so that the pouring of concrete is continuous.

[0107] Reference Figure 5 , Figure 6 and Figure 8As shown, in step S330, after the box girder is prefabricated, the construction personnel can move the disassembly block 230 along the width direction of the base 100, so as to separate the disassembly block 230 from the base 100, thereby eliminating the pressure of the disassembly block 230 on the wedge box 210 or the supporting block 220 and providing space for the sliding of the wedge box 210 and the supporting block 220.

[0108] Reference Figure 5 , Figure 6 and Figure 8 As shown, in step S340, when the box girder is tensioned, the wedge box 210 and the supporting block 220 can slide along with the movement of the box girder, which is beneficial to avoid common quality defects such as local splitting at the end of the prefabricated box girder caused by excessive friction between the structures, and is beneficial to improving the production quality of the box girder.

[0109] Reference Figure 3 , Figure 4 and Fig. 9 As shown, it can be understood that the splicing module 200 also includes a sliding pad 240;

[0110] The construction method, in step S200, connects the wedge box 210 and the plurality of supporting blocks 220 to the upper end of the base 100, including the following steps:

[0111] Step S210, connecting the sliding pad 240 to a preset position on the upper end of the base 100;

[0112] Step S220 , the wedge box 210 and the plurality of supporting blocks 220 are slidably connected to the upper end of the sliding pad 240 .

[0113] Reference Figure 3 , Figure 4 and Fig. 9As shown, in the step of connecting the wedge-shaped box 210 and the plurality of supporting blocks 220 to the upper end of the base 100, the sliding pad 240 can be connected to the upper end of the base 100 first, and the wedge-shaped box 210 and the plurality of supporting blocks 220 are located at the upper end of the sliding pad 240, so that the wedge-shaped box 210 and the plurality of supporting blocks 220 can be slidingly connected with the sliding pad 240. The pedestal of the prefabricated box beam is slidingly connected with the sliding pad 240 through the wedge-shaped box 210 and the plurality of supporting blocks 220. Before the box beam is prefabricated, the supporting blocks 220 can be removed to facilitate the removal of the supporting blocks 220. The wedge box 210 and the supporting block 220 are connected by sliding connection, so as to adjust the relative position relationship between the wedge box 210 and the multiple supporting blocks 220 to meet the prefabrication requirements of the wedge blocks of the box beam at different positions. After the prefabrication is completed, the disassembly block 230 is removed to make the wedge box 210 and the multiple supporting blocks 220 slide relative to the sliding pad 240 as a whole, so as to avoid the common quality defects such as local splitting at the end of the prefabricated box beam due to excessive friction between the structures during the tensioning process. The setting of the sliding pad 240 is conducive to improving the sliding smoothness of the wedge box 210 and the supporting block 220.

[0114] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The pedestal of the prefabricated box beam is characterized in that: include: Base (100); A splicing module (200) comprises a wedge-shaped box (210) and a plurality of supporting blocks (220), wherein the upper end surface of the wedge-shaped box (210) is provided with a wedge-shaped groove (2121), and the wedge-shaped box (210) and the plurality of supporting blocks (220) are both capable of being connected to or separated from the upper end of the base (100); when the wedge-shaped box (210) and the plurality of supporting blocks (220) are both connected to the base (100), the wedge-shaped box (210) and the plurality of supporting blocks (220) are arranged along the length direction of the base (100) and abut against each other, and the upper end surface of the wedge-shaped box (210) and the upper end surfaces of the plurality of supporting blocks (220) jointly define a supporting surface, and the supporting surface is used to support a box beam.

2. The pedestal of the prefabricated box beam according to claim 1, characterized in that: The splicing module (200) further comprises a disassembly block (230), wherein the disassembly block (230) is detachably connected to the base (100) along the width direction of the base (100), and the wedge-shaped box (210) and the plurality of supporting blocks (220) are capable of being slidably connected to the base (100) along the length direction of the base (100); when the disassembly block (230) is connected to the base (100), the disassembly block (230) is capable of abutting against the wedge-shaped box (210) or the supporting block (220) to limit the sliding of the wedge-shaped box (210) and the supporting block (220) relative to the base (100).

3. The pedestal of the prefabricated box beam according to claim 2, characterized in that: The splicing module (200) further comprises a sliding pad (240), wherein the sliding pad (240) is connected to the upper end of the base (100), and the wedge box (210) and the plurality of supporting blocks (220) can be slidably connected to the sliding pad (240).

4. The pedestal of the prefabricated box beam according to claim 3, characterized in that: The sliding pad (240) is a polytetrafluoroethylene pad.

5. The pedestal of the prefabricated box beam according to claim 1, characterized in that: The splicing module (200) comprises at least three supporting blocks (220), the width direction of the supporting blocks (220) is consistent with the length direction of the base (100), the three supporting blocks (220) are respectively a first sub-block (221), a second sub-block (222) and a third sub-block (223), and the widths of the first sub-block (221), the second sub-block (222) and the third sub-block (223) increase successively.

6. The pedestal of the prefabricated box beam according to claim 1, characterized in that: The wedge-shaped box (210) comprises a box body (211), an end plate (212) and a threaded connector (213); the box body (211) is connected to the base (100); the wedge-shaped groove (2121) is provided on the end plate (212); one end of the threaded connector (213) is connected to one of the box body (211) and the end plate (212); the other end is connected to another thread; the end plate (212) can be raised and lowered relative to the box body (211).

7. The pedestal of the prefabricated box beam according to any one of claims 1 to 6, characterized in that: The invention also comprises a plurality of fixed blocks (300), the base (100) being provided with a plurality of fixed sections (120) and a plurality of sliding sections (110) arranged in a staggered manner, the sliding sections (110) corresponding one-to-one to the splicing modules (200), the splicing modules (200) being arranged on the sliding sections (110), the fixed sections (120) corresponding one-to-one to the fixed blocks (300), and the fixed blocks (300) being connected to the base (100) and arranged on the fixed sections (120).

8. A construction method, characterized in that: The pedestal applied to the prefabricated box beam according to any one of claims 1 to 7, the construction method comprising: Leveling the construction site, arranging steel bars, and pouring concrete to obtain the base (100); According to the position of the wedge block on the box beam, the relative position relationship between the wedge box (210) and the plurality of supporting blocks (220) is adjusted, and the wedge box (210) and the plurality of supporting blocks (220) are connected to the upper end of the base (100); The base material of the box beam is placed on the supporting surface, and the box beam is prefabricated and tensioned.

9. The construction method according to claim 8, characterized in that: The splicing module (200) further comprises a disassembly block (230), wherein the disassembly block (230) is detachably connected to the base (100) along the width direction of the base (100), and the wedge-shaped box (210) and the plurality of supporting blocks (220) are slidably connected to the base (100) along the length direction of the base (100); Placing the base material of the box beam on the supporting surface and prefabricating and tensioning the box beam comprises: The disassembly block (230) is connected to the upper end of the base (100), so that the disassembly block (230) limits the sliding movement of the wedge-shaped box (210) and the supporting block (220) relative to the base (100); Placing the base material of the box beam on the upper ends of the disassembly block (230), the wedge-shaped box (210) and the plurality of supporting blocks (220) to prefabricate the box beam; After the prefabrication of the box beam is completed, the disassembly block (230) is separated from the base (100) along the width direction of the base (100), so that the wedge box (210) and the supporting block (220) can slide along the length direction of the base (100); The box girder is tensioned.

10. The construction method according to claim 9, characterized in that: The splicing module (200) further includes a sliding pad (240); The method of connecting the wedge-shaped box (210) and the plurality of supporting blocks (220) to the upper end of the base (100) comprises: Connecting the sliding pad (240) to a preset position on the upper end of the base (100); The wedge-shaped box (210) and the plurality of supporting blocks (220) are all slidably connected to the upper end of the sliding pad (240).

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