Curve via hole moving method for downward moving formwork

Abstract

The invention provides a curve through hole moving method of a downward moving formwork, the downward moving formwork comprises two formwork main longitudinal beams which are parallel to each other, the front ends of the formwork main longitudinal beams are hinged with front overhanging arms through first vertical rotating shafts, and the rear ends of the formwork main longitudinal beams are hinged with rear overhanging arms through second vertical rotating shafts; according to the invention, the displacement trolley is adopted, the arc-shaped supporting sliding seat module of the displacement trolley is used for supporting the formwork in a sliding manner in the curved hole passing advancing process of the formwork, and the displacement trolley is driven by the transverse movement driving mechanism of the displacement trolley to transversely move along the pier-side supporting legs; further, the displacement trolley drives the mold frame to generate transverse deviation through a guide catch wheel module of the displacement trolley, so that the movement track of the mold frame is adjusted in real time, and curve hole passing of the mold frame is realized; in addition, in the mold base curve hole passing process, the guide catch wheel module on the displacement trolley can drive the upper-layer rotating base of the displacement trolley to rotate in a self-adaptive mode so as to adapt to the real-time deflection angle during mold base curve hole passing.

Description

Technical Field

[0001] This invention belongs to the field of marine highway bridge construction technology, specifically relating to a method for moving a downward-moving formwork through a curved hole. Background Technology

[0002] Downward-moving formwork is a large-scale piece of equipment used in highway bridge construction. Its working principle utilizes piers and abutments as support points, with the main beam supporting the formwork, beam weight, and various construction loads. Evenly spaced crossbeams are installed on the upper part of the main beam to increase overall stability and provide a platform for formwork operations. This technology offers advantages such as simple construction procedures, short construction cycles, and continuous construction. Furthermore, it eliminates the need for formwork supports under the bridge, ensuring uninterrupted traffic and navigation under the bridge during construction. In its development, to improve engineering adaptability and meet the needs of different bridge types, downward-moving formwork has evolved into various structures and forms. However, its application in small-radius (<600m) and large-span bridge construction still faces significant limitations. Small curve radii cause large trajectory deviations when the moving formwork longitudinally moves across spans (where "span" refers to the span between piers or the space between bridge spans; the space between one pier and the next is a "span"). Therefore, a method for curved span movement of the downward-moving formwork needs to be designed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for moving curved through holes in a downward-moving mold frame.

[0004] This invention is achieved through the following technical solution:

[0005] A method for moving a downward-moving formwork frame through a curved hole, the downward-moving formwork frame including two parallel main longitudinal beams of the formwork frame, a front extension arm is hinged to the front end of the main longitudinal beam of the formwork frame through a first vertical pivot, and a rear extension arm is hinged to the rear end of the main longitudinal beam of the formwork frame through a second vertical pivot.

[0006] When the formwork needs to be moved through the curved hole, the pier-side support leg at the rear end of the rear outrigger and the shifting trolley on it are moved to the pier position at the front end of the current front outrigger. Then, all the main lifting cylinders of the formwork and the support cylinders of the front frame of the front outrigger retract synchronously, so that the formwork is lowered as a whole. After the formwork is lowered, the main longitudinal beam of the formwork and the front outrigger are supported by the arc-shaped support slide block module on the shifting trolley below them, and the bottom of the main lifting cylinder is separated from the shifting trolley.

[0007] After the formwork is lowered, the longitudinal drive mechanism of the shifting trolley drives the formwork to move longitudinally through the curved hole. During the movement, the arc-shaped support slide module of the shifting trolley provides sliding support for the formwork, and the lateral drive mechanism of the shifting trolley drives the shifting trolley to move laterally along the support leg next to the pier. The shifting trolley uses its guide wheel module to drive the formwork to shift laterally, thereby adjusting the movement trajectory of the formwork in real time to achieve curved hole passage. During the curved hole passage of the formwork, the guide wheel module on the shifting trolley drives the upper rotating seat of the shifting trolley to rotate adaptively to adapt to the real-time deflection angle when the formwork passes through the curved hole. In addition, during the movement of the formwork, the lifting main top cylinder moves together with the formwork.

[0008] In the above technical solution, before the formwork is moved, the entire formwork is erected at the four adjacent pier positions. The main longitudinal beam of the formwork is supported by the lifting main top hydraulic cylinder on the shifting trolley on the pier-side support legs of the two middle adjacent pier positions. The front end of the front outrigger is suspended on the foremost pier of the four piers through the front frame. The rear end of the rear outrigger is supported by the lifting main top hydraulic cylinder on the shifting trolley on the pier-side support legs of the last pier position of the four piers.

[0009] In the above technical solution, the top of the lifting main top cylinder is connected to the mold frame. When the mold frame is in a fixed support construction state, the lifting main top cylinder is in an extended state. At this time, the bottom of the lifting main top cylinder is supported by the shifting trolley.

[0010] In the above technical solution, at a single pier location, two sets of pier-side support legs are symmetrically arranged longitudinally, and each set of pier-side support legs includes two symmetrically arranged pier-side support legs laterally. Each pier-side support leg is equipped with a shifting trolley.

[0011] In the above technical solution, the displacement trolley includes a trolley base, an upper rotating seat, an arc-shaped support slide module, a guide wheel module, a longitudinal drive mechanism, and a transverse drive mechanism. The upper rotating seat is mounted on the trolley base via a vertical rotating shaft. Lower hook units are provided on the longitudinal front and rear sides of the trolley base, and the lower hook units hook onto the flanges of the support legs beside the pier. Arc-shaped support slide modules are provided on the transverse left and right sides of the upper rotating seat. The arc-shaped support slide module includes a slide and a slide mounting base. The top surface of the slide is flat, and the bottom surface of the slide is arc-shaped. Installed in a slide mounting base, an arc-shaped support plate is provided inside the slide mounting base, and the arc-shaped bottom surface of the slide contacts the surface of the arc-shaped support plate; an arc-shaped elongated through hole is provided on the side plate of the slide mounting base, and a corresponding protrusion is provided on the side wall of the slide, the protrusion being inserted into the arc-shaped elongated through hole; a guide wheel module is arranged on the outside of the arc-shaped support slide module, the guide wheel module being used for rolling contact with the outer wall of the mold frame; a first connecting lug is provided on the upper rotating seat, connecting to the longitudinal movement drive mechanism; a second connecting lug is provided on the trolley base, connecting to the transverse movement drive mechanism.

[0012] In the above technical solution, a lifting main top cylinder support seat is also provided on the upper rotating seat of the transfer trolley. The lifting main top cylinder support seat is used to support the lifting main top cylinder.

[0013] In the above technical solution, the sliding seat of the transfer trolley is a rectangular box structure with an open top. At least two downward protruding positioning posts are provided on the bottom plate of the sliding seat, and corresponding positioning holes are provided on the upper rotating seat. The positioning posts are embedded in the positioning holes to realize the positioning of the sliding seat and the upper rotating seat. The sliding seat and the upper rotating seat are welded and fixed.

[0014] In the above technical solution, the number of guide wheel modules of the transfer trolley is four, which are respectively set at the four corners of the upper rotating seat, and two guide wheel modules are arranged on the outside of each arc-shaped support slide module.

[0015] In the above technical solution, the longitudinal drive mechanism of the transfer trolley includes a longitudinal drive cylinder and a longitudinal connecting frame connected to the front end of the longitudinal drive cylinder. The longitudinal connecting frame is used to connect the bottom rail of the mold frame.

[0016] In the above technical solution, the lateral movement drive mechanism of the transfer trolley includes a lateral movement drive cylinder and a lateral movement connecting frame connected to the front end of the lateral movement drive cylinder; the lateral movement connecting frame includes four support arms, and each support arm has a hook structure at its end. The hook structure is bolted to the end of the support arm and is used to hook onto the flange of the pier side support leg; a vertical positioning pin is also provided in the middle of the lateral movement connecting frame, which is used to insert into the pin hole at the top of the pier side support leg to realize the fixed connection between the lateral movement connecting frame and the pier side support leg, and then the trolley is driven to move laterally by the action of the lateral movement drive cylinder.

[0017] The advantages and beneficial effects of this invention are as follows:

[0018] This invention designs a method for moving a descending movable mold frame through curved holes. The descending movable mold frame includes two parallel main longitudinal beams. A front extendable arm is hinged to the front end of the main longitudinal beams via a first vertical pivot, and a rear extendable arm is hinged to the rear end of the main longitudinal beams via a second vertical pivot. Since the front and rear extendable arms are hinged to the main longitudinal beams via vertical pivots, they can deflect relative to the main longitudinal beams, thus adapting to the deflection requirements during curved hole movement. This invention employs a shifting trolley, which can drive the mold frame to move in three dimensions: longitudinal, lateral, and vertical. It also provides strong support for the mold frame during movement and adapts to the pitch and deflection angles of the mold frame. The longitudinal drive mechanism of the shifting trolley drives the mold frame to move longitudinally through the curved hole. During the movement of the mold frame through the curved hole, the arc-shaped support slide module of the shifting trolley provides sliding support for the mold frame. During the longitudinal movement through the curved hole, the lateral drive mechanism of the shifting trolley drives the shifting trolley to move laterally along the support leg next to the pier. Then, the shifting trolley drives the mold frame to make lateral offset through its guide wheel module, so as to adjust the movement trajectory of the mold frame in real time and realize the curved hole movement of the mold frame. In addition, during the curved hole movement of the mold frame, the guide wheel module on the shifting trolley drives the upper rotating seat of the shifting trolley to rotate adaptively to adapt to the real-time deflection angle of the mold frame when it moves through the curved hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the mold frame before it moves through the curved hole.

[0020] Figure 2 This is a schematic diagram showing the front end of the formwork's outrigger arm suspended and supported on the bridge pier via the front frame.

[0021] Figure 3 This is a cross-sectional schematic diagram of the formwork under fixed support during construction.

[0022] Figure 4This is a front view diagram of the mold frame in a lowered state.

[0023] Figure 5 This is a schematic diagram showing how the support leg next to the pier at the rear end of the cantilever arm of the formwork and the moving trolley on it are moved to the pier at the front end of the cantilever arm.

[0024] Figure 6 This is a schematic diagram of the mold frame after it has completed the curved through-hole movement.

[0025] Figure 7 This is an elevation view of the transfer trolley.

[0026] Figure 8 This is a top view of the transfer trolley.

[0027] Figure 9 This is a side view of the transfer trolley.

[0028] Figure 10 This is a schematic diagram of the slide of the transfer trolley.

[0029] Figure 11 This is a structural diagram of the sliding seat mounting base of the transfer trolley.

[0030] Figure 12 This is a top view of the transverse drive mechanism of the transfer trolley.

[0031] Figure 13 This is a schematic diagram of the elevation structure of the lateral drive mechanism of the transfer trolley.

[0032] Figure 14 This is an enlarged schematic diagram of the longitudinal movement of the transfer trolley.

[0033] Figure 15 This is an enlarged schematic diagram of the lifting main top cylinder in a supported state.

[0034] In the diagram, 100: Shifting trolley, 200: Main longitudinal beam of formwork, 201: Crossbeam, 202: Formwork, 210: Track, 300: Front outrigger, 301: Front frame, 400: Rear outrigger, 500: Support leg beside pier.

[0035] 1: Trolley base, 2: Upper rotating seat, 3: Arc-shaped support slide module, 4: Guide wheel module, 5: Longitudinal drive mechanism, 6: Lateral drive mechanism, 7: Vertical rotating shaft, 8: Lifting main top cylinder;

[0036] 11: Second connecting lug; 12: Lower hook unit; 13: Lower vertical bearing rib plate;

[0037] 21: First connecting lug; 22: Lifting main jack cylinder support seat; 23: Upper vertical bearing rib plate;

[0038] 31: Slide, 311: Protruding post, 32: Slide mounting base, 321: Arc-shaped support plate, 322: Positioning post, 323: Arc-shaped elongated through hole;

[0039] 51: Longitudinal traverse drive cylinder; 52: Longitudinal traverse connecting bracket; 53: Pin shaft;

[0040] 61: Transverse drive cylinder; 62: Transverse connecting frame; 621: Two of the support arms; 622: The other two support arms; 63: Hook structure; 64: Positioning pin. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0042] This invention designs a method for moving curved through holes in a downward-moving mold frame, see appendix. Figure 1 The descending movable mold frame includes two parallel main longitudinal beams 200. A front extendable arm 300 is hinged to the front end of the main longitudinal beams 200 via a first vertical pivot, and a rear extendable arm 400 is hinged to the rear end of the main longitudinal beams 200 via a second vertical pivot. Since the front extendable arm 300 and the rear extendable arm 400 are hinged to the main longitudinal beams 200 via vertical pivots, they can deflect relative to the main longitudinal beams 200, thereby adapting to the deflection requirements when the mold frame moves through curved holes.

[0043] When the formwork is in a fixed support state (in this state, the main longitudinal beam 200 of the formwork is used as the supporting foundation for pouring the current section of the box girder, see Appendix) Figure 3 During the construction of the box girder, a crossbeam 201 connects the two main longitudinal beams 200 of the formwork. A formwork 202 is erected on the crossbeam 201, and concrete is poured into the formwork 202 to form the box girder of the bridge. (See appendix) Figure 1 The entire formwork is erected at the locations of four adjacent bridge piers. The main longitudinal beam 200 of the formwork is supported by the lifting main hydraulic cylinders 8 on the shifting trolleys 100 on the pier-side support legs 500 of the two middle adjacent piers. The front end of the front cantilever arm 300 is suspended and supported on the foremost pier of the four piers via the front frame 301 (for the structure of the front frame, see Appendix). Figure 2 The front frame 301 is mounted on top of the pier via support cylinders. Hangers on both sides of the front frame connect to the front outrigger 300, ensuring its long-term stability during construction. The rear end of the rear outrigger 400 is supported by the lifting main jack cylinder 8 on the shifting trolley 100 on the pier support leg at the rearmost pier position of the four piers. It should be noted that... (See Appendix...) Figure 3The top of the lifting main top cylinder 8 is connected to the mold frame, not fixedly connected to the shifting trolley 100. When the mold frame is in a fixed-support construction state, the lifting main top cylinder 8 is in an extended state, with its bottom supported by the shifting trolley 100. When the lifting main top cylinder 8 retracts, the mold frame descends. After the mold frame reaches its final position (at which point it is supported by the arc-shaped support slide module of the shifting trolley 100, as will be explained later), the bottom of the lifting main top cylinder 8 separates from the shifting trolley 100. When the mold frame is moved, the lifting main top cylinder 8 moves along with it (because the top of the lifting main top cylinder 8 is connected to the mold frame). For further details, see the appendix. Figure 3 and attached Figure 4 At a single pier location, two sets of pier-side support legs are symmetrically arranged longitudinally, front and back. Each set of pier-side support legs includes two symmetrically arranged pier-side support legs 500 in the transverse direction (i.e., there are 4 pier-side support legs 500 at a single pier location). Each pier-side support leg 500 is equipped with a shifting trolley 100.

[0044] The structure and function of the transfer trolley 100 are described in detail below.

[0045] See appendix Figure 7 -Appendix Figure 15 The shifting trolley 100 includes a trolley base 1, an upper rotating seat 2, an arc-shaped support slide module 3, a guide wheel module 4, a longitudinal drive mechanism 5, and a transverse drive mechanism 6.

[0046] The upper rotating seat 2 is mounted on the trolley base 1 via a vertical rotating shaft 7. Preferably, both the trolley base 1 and the upper rotating seat 2 are rectangular frame structures, and the vertical rotating shaft 7 is located in the middle of the trolley base 1 and the upper rotating seat 2. Lower hook units 12 are provided at the bottom of the longitudinal front and rear sides of the trolley base 1 (the longitudinal direction refers to the direction of the main longitudinal beam of the mold frame). (The lower hook units 12 are bolted to the trolley base 1). Preferably, two lower hook units 12 are arranged on each side. The lower hook units 12 are used to hook onto the flange of the support leg next to the pier, so that the moving trolley 100 can move laterally along the support leg next to the pier under the drive of the lateral movement drive mechanism.

[0047] There are two arc-shaped support slide modules 3, which are symmetrically arranged on the left and right sides of the upper rotating seat 2. The arc-shaped support slide modules 3 provide support for the mold frame (when the mold frame needs to be moved, it rests on the arc-shaped support slide module 3). Furthermore, the arc-shaped support slide module 3 can adapt to changes in the pitch angle of the mold frame, providing stable support. For details, see the appendix. Figure 10 and attached Figure 11The structure of the arc-shaped support slide module 3 is as follows: it includes a slide 31 and a slide mounting base 32. The top surface of the slide 31 is flat, and the bottom surface of the slide 31 is arc-shaped. The slide 31 is installed in the slide mounting base 32, and the slide mounting base 32 is fixedly installed on the upper rotating base 2. An arc-shaped support plate 321 is provided inside the slide mounting base 32. The arc-shaped bottom surface of the slide 31 is in surface contact with the arc-shaped support plate 321, so that the arc-shaped support plate 321 can provide sufficient support for the slide 31 (surface contact provides sufficient force-bearing surface). The slide 31 can also slide in an arc along the arc-shaped support plate 321, thereby adapting to the change of pitch angle of the mold frame during the movement of the mold frame. Furthermore, the slide mounting base 32 is a rectangular box structure with an open top. The bottom plate of the slide mounting base 32 is provided with at least two downward protruding positioning posts 322, and the upper rotating seat 2 is provided with corresponding positioning holes. The positioning posts 322 are embedded in the positioning holes to achieve positioning of the slide mounting base 32 and the upper rotating seat 2. The slide mounting base 32 and the upper rotating seat 2 are welded and fixed. The side plate of the slide mounting base 32 is provided with an arc-shaped elongated through hole 323 as a sliding limit hole, and the side wall of the slide 31 is provided with a corresponding protruding post 311. The protruding post 311 is inserted into the arc-shaped elongated through hole 323 to prevent the slide 31 from falling out of the slide mounting base 32.

[0048] The number of guide wheel modules 4 is preferably four, respectively located at the four corners of the upper rotating seat 2, with two guide wheel modules 4 arranged on the outer side of each arc-shaped support slide module 3. When the mold frame needs to be moved, the mold frame descends onto the slide 31, and the guide wheel modules 4 are used to make rolling contact with the outer wall of the mold frame. Then, during the curved forward movement of the mold frame (the mold frame itself will deflect), the outer wall of the mold frame applies a force to the guide wheel modules 4, thereby driving the upper rotating seat 2 to adaptively rotate around the vertical axis 7 to adapt to the real-time deflection angle of the mold frame.

[0049] A first connecting lug 21 is provided on the upper rotating base 2 for connecting the longitudinal movement drive mechanism 5, which drives the mold frame to move longitudinally. Further, the longitudinal movement drive mechanism 5 includes a longitudinal movement drive cylinder 51 and a longitudinal movement connecting frame 52 connected to the front end of the longitudinal movement drive cylinder 51. The longitudinal movement connecting frame 52 is slidably mounted on the bottom track 210 of the mold frame (see Appendix). Figure 15The longitudinal moving connecting frame 52 is connected to the different positioning holes on the track 210 at equal intervals along the length of the track. The longitudinal moving driving cylinder 51 is then activated to drive the mold frame to move stepwise. (When moving, the longitudinal moving connecting frame 52 is first connected to the positioning hole on the bottom track 210 of the mold frame through the pin. Then the longitudinal moving driving cylinder 51 is activated to achieve one step movement. Then the pin is pulled out to reset the longitudinal moving driving cylinder 51. After resetting, the longitudinal moving connecting frame 52 is connected to the positioning hole on the bottom track of the mold frame through the pin again. The longitudinal moving driving cylinder 51 is activated again to achieve the next step movement. The above operation is repeated to achieve stepwise movement of the mold frame by the longitudinal moving driving cylinder 51.)

[0050] A second connecting lug 11 is provided on the trolley base 1 for connecting the transverse drive mechanism 6. The transverse drive mechanism 6 is used to drive the entire trolley to move laterally, adjusting the lateral position of the trolley, and thus adjusting and adapting to the lateral position of the mold frame. For further details, see the appendix. Figure 12 and attached Figure 13 The lateral movement drive mechanism 6 includes a lateral movement drive cylinder 61 and a lateral movement connecting frame 62 connected to the front end of the lateral movement drive cylinder 61. The lateral movement connecting frame 62 is K-shaped and includes four arms, two of which are symmetrically arranged in a straight line and the other two are symmetrically arranged at an angle. Each arm of the lateral movement connecting frame 62 is provided with a hook structure 63 at its end. The hook structure 63 is bolted to the end of the arm and is used to hook onto the flange of the pier support leg. A vertical positioning pin 64 is also provided in the middle of the lateral movement connecting frame 62. Multiple pin holes are provided in the top of the pier support leg along the lateral direction. The positioning pin 64 is inserted into the pin holes to achieve a fixed connection between the lateral movement connecting frame 62 and the pier support leg. Then, the lateral movement of the trolley is driven by the action of the lateral movement drive cylinder 61.

[0051] The upper rotating seat 2 is also equipped with a lifting main top cylinder support seat 22 (see appendix). Figure 8 The lifting main jack cylinder support 22 is used to support the lifting main jack cylinder 8 (see Appendix). Figure 15 The top of the lifting main top cylinder 8 is connected to the mold frame, used to support the mold frame and control the lifting and lowering of the mold frame. Furthermore, since the lifting main top cylinder needs to provide stable support for the mold frame, the lifting main top cylinder support seat 22 at the bottom of the lifting main top cylinder must have sufficient support strength. For this purpose, see Appendix... Figure 7 The present invention provides multiple upper vertical bearing ribs 23 at the lower part of the lifting main top cylinder support seat 22 of the upper rotating seat 2, and multiple lower vertical bearing ribs 13 inside the trolley base 1.

[0052] The curved through-hole movement of the downward moving mold frame is achieved by using the downward moving mold frame and the shifting trolley 100 as described above.

[0053] When the formwork needs to be moved along a curved path through a span (i.e., the entire formwork is moved forward one pier position to facilitate the pouring of the next section of the box girder; and since the piers are not arranged in a straight line, it is a curved path through the span, where "span" refers to the span or space between piers, and the space between one pier and the next is a "span"), the pier-side support leg 500 at the rear end of the rear outrigger 400 and the moving trolley 100 on it are moved to the pier position at the front end of the current front outrigger 300 (see Appendix). Figure 5 (In the state of...) Then, all the main lifting cylinders 8 of the formwork frame and the support cylinders of the front frame of the front outrigger 300 retract synchronously, causing the formwork frame to descend as a whole. After descending, the main longitudinal beam 200 and the front outrigger 300 are both supported by the arc-shaped support slide module 3 on the shifting trolley 100 below them (that is, the main longitudinal beam 200 of the formwork frame rests on the arc-shaped support slide module 3 of the shifting trolley on the pier-side support leg at the middle two adjacent pier positions of the four piers, and the front end of the front outrigger 300 rests on the arc-shaped support slide module 3 of the shifting trolley on the pier-side support leg at the foremost pier position of the four piers), and at this time, the bottom end of the main lifting cylinder 8 separates from the shifting trolley 100. In addition, it is necessary to remove or fold the crossbeams between the main longitudinal beams 200 of the formwork frame and the template, which is existing technology and will not be described in detail here.

[0054] After the mold frame is lowered, the longitudinal transfer connecting frame 52 of the longitudinal transfer drive mechanism 5 of the transfer trolley 100 is connected to the positioning hole on the bottom rail 210 of the mold frame via the pin 53 (see Appendix). Figure 14 and attached Figure 15 The longitudinal drive mechanism 5 uses a longitudinal drive cylinder 51 to drive the mold frame to move longitudinally through the curved hole. During the movement, the arc-shaped support slide module 3 of the shifting trolley 100 provides sliding support for the mold frame. Furthermore, during the longitudinal curved hole movement, the lateral drive mechanism 6 of the shifting trolley 100 drives the shifting trolley 100 to move laterally along the support leg 500 beside the pier. The shifting trolley 100 then uses its guide wheel module 4 to cause the mold frame to shift laterally, adjusting the movement trajectory of the mold frame in real time to achieve curved hole movement. Additionally, it should be noted that during the curved hole movement of the mold frame, the guide wheel module 4 on the shifting trolley 100 will drive the upper rotating seat 2 to rotate adaptively around the vertical axis 7 to adapt to the real-time deflection angle of the mold frame during curved hole movement. (See appendix) Figure 6 This is a schematic diagram after the formwork has completed the curved passage through the hole. At this point, the entire formwork has moved forward by one pier position.

[0055] Furthermore, after completing the curved passage, the formwork is raised again (i.e., all the main lifting cylinders 8 extend), and the front end of the front outrigger 300 is suspended and supported on the pier through the front frame; then, a crossbeam is connected between the two main longitudinal beams 200 of the formwork, and a template is erected on the crossbeam for the construction of the box girder.

[0056] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0058] The present invention has been described above by way of example. It should be noted that any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort without departing from the core of the present invention fall within the protection scope of the present invention.

Claims

1. A method for moving a curved underpass of a downline mobile formwork, characterized in that: The down-moving formwork comprises two mutually parallel formwork main longitudinal beams, a front outer extension arm hinged to the front end of the formwork main longitudinal beam through a first vertical rotating shaft, and a rear outer extension arm hinged to the rear end of the formwork main longitudinal beam through a second vertical rotating shaft. When the formwork needs to move in a curve through a hole, the pier-side support leg at the rear end of the rear outer extension arm and the displacement trolley thereon are moved to the pier position at the front end of the current front outer extension arm, then all the lifting main jacking oil cylinders of the formwork and the support oil cylinders of the front department of the front outer extension arm are synchronously retracted, so that the formwork as a whole is lowered, after the lowering, the formwork main longitudinal beam and the front outer extension arm are both supported by the arc-shaped support sliding seat modules on the displacement trolleys at the lower parts thereof, and the bottom ends of the lifting main jacking oil cylinders are separated from the displacement trolleys. After the lowering of the formwork, the formwork is driven to move longitudinally in a curve through a hole by the longitudinal displacement driving mechanism of the displacement trolley, in the moving process, the formwork is slidingly supported by the arc-shaped support sliding seat modules of the displacement trolley, and the displacement trolley is driven to move laterally along the pier-side support leg by the lateral displacement driving mechanism of the displacement trolley, so that the displacement trolley drives the formwork to produce lateral deviation through the guide blocking wheel modules thereof, to adjust the movement track of the formwork in real time, so as to realize the curve through hole movement of the formwork; and in the curve through hole movement of the formwork, the guide blocking wheel modules of the displacement trolley drive the upper rotating seat of the displacement trolley to rotate adaptively, to adapt to the real-time deviation angle of the formwork when the formwork moves in a curve through a hole; and in the moving process of the formwork, the lifting main jacking oil cylinders move together with the formwork.

2. The downline mobile prole method of claim 1, wherein: Before the formwork moves, the whole formwork is erected at four adjacent pier positions, wherein the formwork main longitudinal beam is supported by the lifting main jacking oil cylinders on the displacement trolleys on the pier-side support legs at the positions of the middle two adjacent piers among the four piers, the front end of the front outer extension arm is suspended on the frontmost pier among the four piers through the front department of the formwork, and the rear end of the rear outer extension arm is supported by the lifting main jacking oil cylinders on the displacement trolleys on the pier-side support legs at the positions of the rearmost piers among the four piers.

3. The downline curve hole passing method of the downline mobile mold frame according to claim 1, characterized in that: The top of the lifting main jacking oil cylinder is connected to the formwork, and in the construction state of the formwork in fixed support, the lifting main jacking oil cylinder is in an elongated state, at this time, the bottom end of the lifting main jacking oil cylinder is supported by the displacement trolley.

4. The downline curve hole passing method of the downline mobile mold frame according to claim 1, characterized in that: At a single pier position, two groups of pier-side support legs are longitudinally and symmetrically arranged, each group of pier-side support legs comprises two symmetrically arranged pier-side support legs in the lateral direction, and one displacement trolley is arranged on each pier-side support leg.

5. The downline curve hole passing method of the downline mobile mold frame according to claim 1, characterized in that: The shifting trolley comprises a trolley base, an upper rotary seat, an arc-shaped support sliding seat module, a guide blocking wheel module, a longitudinal shifting driving mechanism and a transverse shifting driving mechanism; the upper rotary seat is installed on the trolley base through a vertical rotary shaft, lower hooking units are arranged on the longitudinal front and rear sides of the trolley base, and the lower hooking units are hooked on the flanges of the pier-side support legs; the arc-shaped support sliding seat modules are arranged on the lateral left and right sides of the upper rotary seat, the arc-shaped support sliding seat module comprises a sliding seat and a sliding seat mounting seat, the top surface of the sliding seat is a plane, the bottom surface of the sliding seat is arc-shaped, the sliding seat is installed in the sliding seat mounting seat, an arc-shaped support plate is arranged in the interior of the sliding seat mounting seat, and the arc-shaped bottom surface of the sliding seat is in surface contact with the arc-shaped support plate; arc-shaped long-hole through holes are arranged on the side plates of the sliding seat mounting seat, and corresponding convex columns are arranged on the side walls of the sliding seat, the convex columns are inserted into the arc-shaped long-hole through holes; the guide blocking wheel modules are arranged outside the arc-shaped support sliding seat modules, and the guide blocking wheel modules are used for rolling contact with the outer wall of the mold frame; first connecting lugs are arranged on the upper rotary seat and connected with the longitudinal shifting driving mechanism; second connecting lugs are arranged on the trolley base and connected with the transverse shifting driving mechanism.

6. The method of claim 5, wherein: A lifting main lifting oil cylinder support seat is further arranged on the upper rotary seat of the shifting trolley, and the lifting main lifting oil cylinder support seat is used for supporting a lifting main lifting oil cylinder.

7. The downline curve hole passing method of the downline mobile mold base according to claim 5, wherein: The sliding seat mounting seat of the shifting trolley is a rectangular box structure with an open upper end, at least two downward protruding positioning columns are arranged on the bottom plate of the sliding seat mounting seat, corresponding positioning holes are arranged on the upper rotary seat, the positioning columns are embedded in the positioning holes, the positioning of the sliding seat mounting seat and the upper rotary seat is realized, and the sliding seat mounting seat and the upper rotary seat are welded and fixed.

8. The downline mobile prole method of claim 5, wherein: The number of the guide blocking wheel modules of the shifting trolley is four, and the guide blocking wheel modules are arranged at the four corner positions of the upper rotary seat, and two guide blocking wheel modules are arranged outside each arc-shaped support sliding seat module.

9. The downline curve hole passing method of the downline mobile mold frame according to claim 5, characterized in that: The longitudinal shifting driving mechanism of the shifting trolley comprises a longitudinal shifting driving oil cylinder and a longitudinal shifting connecting frame connected to the front end of the longitudinal shifting driving oil cylinder, and the longitudinal shifting connecting frame is used for connecting the bottom track of the mold frame.

10. The downline curve hole passing method of the downline mobile mold frame according to claim 5, wherein: The transverse shifting driving mechanism of the shifting trolley comprises a transverse shifting driving oil cylinder and a transverse shifting connecting frame connected to the front end of the transverse shifting driving oil cylinder; the transverse shifting connecting frame comprises four supporting arms, hooking structures are arranged at the ends of each supporting arm, the hooking structures are bolted at the ends of the supporting arms, and are used for being hooked on the flanges of the pier-side support legs; a vertical positioning pin is further arranged at the middle position of the transverse shifting connecting frame and is used for being inserted into the pin hole at the top of the pier-side support leg, so that the transverse shifting connecting frame is fixedly connected with the pier-side support leg.

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