In-situ turning and lateral shifting construction method for upward-moving formwork

Abstract

This application discloses a method for in-situ turning and lateral movement of an upward-moving formwork, comprising the following steps: installing a truss rotation system at the rotation center position of the current span; longitudinally moving the main body of the upward-moving formwork towards the construction start end and then retracting it to the rotation center position; fixing the main body of the upward-moving formwork to the truss rotation system and then performing a 180° horizontal rotation; switching the truss rotation system to a lateral movement system and then laterally moving the main body of the upward-moving formwork to another span. This method, by turning the upward-moving formwork in-situ at the construction end end before lateral movement, reduces adverse effects on the overall structure of the upward-moving formwork, helps maintain its alignment, and helps ensure the assembly alignment of the bridge main beam.

Description

Technical Field

[0001] This application relates to the field of road and bridge construction technology, and more specifically, to a construction method for in-situ turning and lateral displacement of an upward-moving mobile formwork. Background Technology

[0002] After the construction of one main beam is completed using an upward-moving formwork, the construction of another beam needs to be carried out. Considering cost, only one set of upward-moving formwork is available on-site. The traditional technique involves dismantling the upward-moving formwork at high altitude and then reinstalling it from the starting end for the construction of the other beam. This operation increases the dismantling and reassembly of the upward-moving formwork, affecting the construction period. Existing technology also includes the idea of ​​moving the entire upward-moving formwork laterally to another beam, but the existing lateral movement system is relatively complex with many control points, making it difficult to further improve construction efficiency. Summary of the Invention

[0003] This application addresses the shortcomings of existing methods by proposing a construction method for in-situ turning and lateral shifting of an upward-moving formwork, thereby solving the technical problems of complex lateral shifting systems and complex lateral shifting control in related technologies.

[0004] This application provides a method for in-situ turning and lateral shifting of an upward-moving formwork during construction, which includes the following steps:

[0005] Install the truss rotation system at the rotation center position of the current span;

[0006] The main body of the upward-moving formwork is moved longitudinally towards the construction start end and then back to the center position of the rotation.

[0007] After the main body of the upward-moving formwork is fixedly connected to the truss rotation system, it is rotated 180° horizontally.

[0008] After switching the truss rotation system to a lateral movement system, the main body of the upward-moving formwork is laterally moved to another frame.

[0009] Alternatively, the rotation center position is set on the bridge deck at the top of the second-to-last pier at the construction end of the current span.

[0010] Alternatively, the truss rotation system includes: an upper turntable for supporting the main body of the upward-moving formwork, with an upper ball joint at its center; a lower turntable fixed at the center of the rotation, with a lower ball joint on its top surface that engages with the upper ball joint; an annular track positioned horizontally and flush with the lower turntable, with the center of the rotation as its center; support legs fixed below the upper turntable and capable of sliding along the annular track; and a rotation jacking member for jacking the support legs to slide, positioned between the support legs and the annular track.

[0011] Alternatively, before the main body of the upward-moving mobile formwork is moved longitudinally backward to the center position of the rotation, the lower hanging beam and formwork system of the upward-moving mobile formwork are disassembled, while the main body of the upward-moving mobile formwork is retained.

[0012] Alternatively, the step of longitudinally moving the main body of the upward-moving formwork towards the construction start end and back to the rotation center position includes: driving a propulsion trolley near the tail end to cause the main body of the upward-moving formwork to longitudinally move towards the construction start end and back to the rotation center position.

[0013] Furthermore, the step of fixing the main body of the upward-moving formwork to the rotation system of the truss and then rotating it 180° includes: symmetrically setting a front temporary support and a rear temporary support on both sides of the longitudinal bridge at the center of rotation, calculating the center of gravity position of the main body of the upward-moving formwork using the pressure values ​​borne by the front temporary support and the rear temporary support, and confirming the docking position between the main body of the upward-moving formwork and the rotation system of the truss based on the center of gravity position.

[0014] Furthermore, determining the docking position between the main body of the upward-moving formwork and the rotation system of the truss based on the center of gravity position includes: offsetting the center of gravity position by 5~10cm towards the tail end of the main body of the upward-moving formwork as the docking center, the docking center being directly opposite the rotation center position, so as to achieve a fixed connection with the rotation system of the truss.

[0015] Alternatively, the step of fixing the main body of the upward-moving formwork to the truss rotation system and then rotating it 180° includes: after fixing the main body of the upward-moving formwork to the truss rotation system, modifying the front temporary support and the rear temporary support into a transverse movement system that spans the other side.

[0016] Alternatively, the lateral movement system includes a left panel assembly, a right panel assembly, and a lateral movement beam connecting the left panel assembly and the right panel assembly. The left panel assembly is installed on the current panel, and the right panel assembly is installed on the other panel. The lateral movement beam is supported by the front temporary support point and / or the rear temporary support point as support column. The front temporary support point or the rear temporary support point includes the middle support leg of the upward moving formwork.

[0017] Alternatively, the step of fixing the main body of the upward-moving formwork to the truss rotation system and then rotating it 180° includes: rotating the upward-moving formwork 180°, then moving the tail end of the main body of the upward-moving formwork longitudinally backward to the bridge deck at the top of the penultimate pier at the construction termination end; and setting the transverse movement system at the top of the penultimate pier and the top of the second-to-last pier.

[0018] The beneficial technical effects of the technical solutions provided in this application include:

[0019] (1) The method of this application involves turning the upward-moving formwork in place at the end of construction and then moving it laterally, which reduces the adverse effects on the overall structure of the upward-moving formwork, helps to maintain the alignment of the upward-moving formwork, and helps to ensure the assembly alignment of the main beam of the bridge.

[0020] (2) The method of this application can disassemble and modify the original components of the upward moving formwork to form an auxiliary in-situ steering device and a lateral movement device. On the one hand, it reduces the material input of the lateral movement device, and on the other hand, it can speed up the leveling and positioning of the lateral movement device. The structure that was disassembled earlier after lateral movement can be reassembled on the upward moving formwork, which is conducive to improving construction efficiency.

[0021] (3) In the method of this application, the power equipment for the longitudinal and lateral movement of the upward mobile formwork mainly relies on the original propulsion trolley and the middle support leg trolley of the upward mobile formwork, which reduces the investment in high-altitude traction equipment and improves the automation control of longitudinal and lateral movement and construction safety.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of the upward-moving mold frame according to an embodiment of this application;

[0025] Figure 2 This is a flowchart of a construction method for in-situ turning and lateral displacement of an upward-moving formwork according to an embodiment of this application.

[0026] Figure 3 This is a structural schematic diagram of a truss rotation system provided in an embodiment of this application;

[0027] Figure 4 A top view of a truss rotation system provided in an embodiment of this application;

[0028] Figure 5 for Figure 4 A schematic diagram of the front structure of the main crossbeam;

[0029] Figure 6 for Figure 5 A top view of the main crossbeam structure;

[0030] Figure 7 for Figure 3 A schematic diagram of the structure of the lower turntable in the middle;

[0031] Figure 8 for Figure 7 A top view of the base structure;

[0032] Figure 9 for Figure 3 A schematic diagram of the supporting legs and the circular track in the middle;

[0033] Figure 10 A front structural view of the support leg in a truss rotation system provided in an embodiment of this application;

[0034] Figure 11 for Figure 10 A bottom view of the upper support structure of the support leg in the middle;

[0035] Figure 12 A schematic diagram of the support legs and rotating jacking components in a truss rotation system provided in an embodiment of this application;

[0036] Figure 13 This is a schematic diagram of the main body of the upward-moving mold frame retracting into position according to an embodiment of this application;

[0037] Figure 14 A schematic diagram showing the working condition of setting up a front temporary support point and a rear temporary support point, and installing a lower turntable and a circular track for the main body of the upward moving formwork using the embodiments of this application.

[0038] Figure 15 This is a schematic diagram of the structure of the main body of the upward-moving mold frame after a 180° horizontal rotation, according to an embodiment of this application.

[0039] Figure 16 A schematic diagram of the structure of the main body of the upward-moving formwork using the embodiments of this application after the lateral movement system is installed;

[0040] Figure 17 for Figure 16 A schematic diagram of the first transverse movement device at pier #44;

[0041] Figure 18 for Figure 16 A schematic diagram of the second lateral movement device at pier #43. Detailed Implementation

[0042] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0043] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in the specification of this application means the presence of the stated features, integers, steps, operations, and / or components, but does not exclude implementations of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the art. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0045] refer to Figure 1 The upward-moving formwork used in this embodiment includes a main beam 1, a nose beam 2, front support legs 5, a middle support leg system 4, a propulsion trolley 6, a rear longitudinal movement system 7, a lower hanging beam 3, a formwork system, and a hydraulic system (not shown). The front end of the main beam 1 connects to the rear end of the nose beam 2. The front end of the nose beam 2 is supported by the front support legs 5, and the rear end of the main beam 1 is supported by the rear longitudinal movement system 7 and the propulsion trolley 6. The front end of the main beam 1 is supported by the middle support leg system 4 near the connection point with the nose beam 2. The entire upward-moving formwork is symmetrically arranged relative to the longitudinal direction of the bridge. Therefore, the main beam 1 includes two symmetrical beams connected by an upper crossbeam. One side of each beam is connected to the lower hanging beam 3. The two lower hanging beams 3 together support the formwork system, and the lower hanging beam 3 can separate to the sides and close towards the center to adapt to the passage requirements during bridge assembly.

[0046] To accommodate the aforementioned requirements for lateral movement and rotation of the upward-moving formwork, refer to... Figure 2 This application provides a construction method for in-situ turning and lateral displacement of an upward-moving formwork, which includes the following steps:

[0047] S1, Install the truss rotation system 8 at the rotation center position of the current span;

[0048] After the upstream moving formwork completes the assembly of the main bridge beam in the current span, that is, after the upstream moving formwork moves longitudinally from the construction start end to the construction end end, it is planned to perform an in-situ turn at the construction end end. Therefore, the center of rotation is set on the bridge deck at the top of the second-to-last pier at the construction end end of the current span; in this embodiment, the last pier at the construction end end is pier #44, and the second-to-last pier is pier #43. Using the bridge deck at the top of the pier as the center of rotation allows the pier to provide supporting force, preventing damage to the main bridge beam.

[0049] refer to Figure 3-12 In the rotation system 8 of this application, the bridge deck is used as the lower bearing surface during the rotation construction of the main body of the upward moving formwork. The rotation center position is set on the bridge deck, and the main body of the truss-type upward moving formwork set above the bridge deck is rotated horizontally.

[0050] The truss rotation system 8 of this application includes: an upper turntable 81, a lower turntable 82, a circular track 83, a support leg 84, and a rotation jacking component 85.

[0051] Specifically, the upper turntable 81 supports the truss of the rotated body, and an upper ball joint 8111 is located at its center. The upper ball joint 8111 is equivalent to the ball head of a ball joint structure. The ball joint is the core structure of the rotation system, responsible for supporting the weight of the truss and allowing the truss to rotate around its central axis. A ball joint typically consists of two hemispherical members, one of which is called the ball head, having a spherical surface for mating with a ball seat; the ball seat is the other spherical member of the ball joint structure, its shape matching the ball head, used to receive the ball head and allow the ball head to rotate freely within a certain range. The ball joint structure of this application achieves translational rotation through the sliding fit of the upper ball joint 8111 and the lower ball joint 821.

[0052] Furthermore, the upper turntable 81 includes a main crossbeam 811, side crossbeams 812 disposed on both sides of the main crossbeam 811, and a longitudinal beam 813 orthogonally connecting the main crossbeam 811 and the side crossbeams 812. In this embodiment, the main crossbeam 811 spans the width of the truss to support the truss. Thus, the main crossbeam 811 is placed transversely, and the side crossbeams 812 are respectively disposed on both sides of the main crossbeam 811 along the longitudinal direction. Preferably, the side crossbeams 812 are arranged with the main crossbeam 811 as the axis of symmetry, so that the upper turntable 81 can be evenly stressed when the axis of symmetry of the main crossbeam 811 is located at the center of rotation. In order to provide sufficient and stable support for the truss, the lengths of the main crossbeam 811 and the side crossbeams 812 are adapted to the width of the truss, and positioning components that cooperate with the truss are respectively provided.

[0053] The length of the main crossbeam 811 is not less than the width of the truss, so as to fully support the truss in the transverse direction. A main positioning assembly 8113, which cooperates with the truss, is provided on the top surface 8231 of the main crossbeam 811. The main positioning assembly 8113 includes positioning plates on the top surface 8231 of the main crossbeam 811. The positioning plates are positioned to suit the structure of the truss and the contact position between the truss and the upper turntable 81. Several positioning plates are provided on the top surface 8231 of the main crossbeam 811. The positioning plates serve as pads for the truss and the main crossbeam 811, and also provide positioning to facilitate the rapid positioning and installation of the upper turntable 81. The main positioning assembly 8113 also includes limiting plates at both ends of the longitudinal length of the top surface 8231 of the main crossbeam 811. The limiting plates abut against the outer edge of the truss to prevent the truss from shifting laterally off the main crossbeam 811. The main positioning assembly 8113 can be fixed to the main crossbeam 811 by welding or bolting. The main crossbeam 811 is also provided with a main connector 8114 that protrudes longitudinally from both sides of its body for connecting the longitudinal beam 813. In this embodiment, the main crossbeam 811 and the longitudinal beam 813 are connected by bolting.

[0054] The side beam 812 can be the same length as the main beam 811 and is arranged parallel to the main beam 811. The top surface 8231 of the side beam 812 is provided with a side positioning component 8121 that cooperates with the truss. The side positioning component 8121 is arranged in a similar manner to the main positioning component 8113. The side positioning component 8121 includes a positioning plate provided on the top surface 8231 of the side beam 812 and a limiting plate provided at both ends of the longitudinal length of the top surface 8231 of the side beam 812. The side positioning component 8121 can be fixed to the side beam 812 by welding or bolting. The side beam 812 facing the main beam 811 is also provided with a side connector 8122 that protrudes longitudinally from both sides of its body for connecting the longitudinal beam 813. In this embodiment, the side beam 812 and the longitudinal beam 813 are connected by bolting.

[0055] Furthermore, an upper ball joint 8111 protruding downwards from the center of symmetry of the main crossbeam 811 is provided. The upper ball joint 8111 has a spherical curved surface structure. The upper side of the upper ball joint 8111 is fixedly connected to the main crossbeam 811, and a reinforcing rib is provided at the main crossbeam 811 to improve the load-bearing capacity of the upper ball joint 8111. A vertically penetrating upper center hole 8112 is provided at the center point of the upper ball joint 8111. This upper center hole 8112 is aligned with the center of symmetry of the main crossbeam 811 and needs to be matched with the center position of the rotating body when the upper turntable 81 is installed. In this embodiment, the planar projection diameter of the upper ball joint 8111 is 1.24m, the spherical radius is 2.6m, and it is made of 100mm thick steel plate.

[0056] Preferably, the main beam 811 and side beam 812 of the upper turntable 81 are made of steel, which facilitates connection and fixation with the truss of the rotating body, which is also made of steel. The steel members can form a relatively stable connection system through bolting or welding, which also facilitates disassembly and allows the truss to be lowered after rotation. In addition, the connection system between the upper turntable 81 and the truss of the rotating body helps to form a multi-directional, three-dimensional force state during the rotation of the truss, better ensuring the stability and safety of the rotation.

[0057] The lower turntable 82 includes a base 823 and a lower ball joint 821 disposed on the top of the base 823. The base 823 is truncated pyramidal in shape, with the area of ​​the top surface 8231 being smaller than the area of ​​the bottom surface 8232. The top surface 8231 of the base 823 is used to house the lower ball joint 821. In this embodiment, the lower ball joint 821 is also a spherical curved surface structure with the same curvature as the upper ball joint 8111. The lower ball joint 821 and the upper ball joint 8111 can fit together. Furthermore, the center point of the lower ball joint 821 is provided with a vertically penetrating lower center hole 822. This lower center hole 822 is aligned with the center of symmetry of the base 823 and needs to be matched with the center position of the rotating body when the lower turntable 82 is installed, that is, the lower center hole 822 is aligned with the upper center hole 8112 of the upper ball joint 8111. In this embodiment, the lower ball joint 821 has a planar projection diameter of 1.24m and a spherical radius of 2.6m, and is made of 100mm thick steel plate. Further, the machining accuracy requirements of the upper ball joint 8111 and the lower ball joint 821 should be as follows: (1) the surface roughness is not greater than Ra25; (2) the curvature of each part of the spherical surface should be equal, and the difference in the radius of curvature should be within ±0.9mm; (3) the elevation difference of each point on the edge is not greater than 1mm; (4) the ellipticity is not greater than 1.5mm; (5) the deviation of the position of the upper center hole 8112, the lower center hole 822 and the rotation center is not greater than 2mm.

[0058] When assembling the ball joints, a rotating shaft 86 corresponding to the center position of the rotating body is provided between the upper ball joint 8111 and the lower ball joint 821. That is, the two ends of the rotating shaft 86 need to pass through the upper center hole 8112 and the lower center hole 822 respectively, so that the upper ball joint 8111 can rotate relative to the lower ball joint 821 with the rotating shaft 86 as the center, driving the upper turntable 81 to rotate. Further, multiple polytetrafluoroethylene (PTFE) slides are filled between the upper turntable 81 and the lower turntable 82. In this embodiment, based on the contact area of ​​the upper ball joint 8111 and the lower ball joint 821 and the area of ​​a single PTFE slide, 148 Ø60×20mm PTFE slides are provided in the lower ball joint 821.

[0059] The bottom surface 8232 of the base 823 is used for anchoring to the underlying bearing surface. In this embodiment, the underlying bearing surface is the top surface 8231 of the bridge. While the bridge deck typically has certain transverse and longitudinal slopes, the rotation construction requires the rotation system to provide a horizontal working surface. Therefore, a leveling layer 87 can be provided between the bottom surface 8232 of the base 823 and the bridge deck to compensate for the slope caused by the bridge deck's inclination. In one possible implementation, the leveling layer 87 is filled with epoxy mortar. Further, the bottom surface 8232 of the base 823 is fixed to the bridge deck structure through an anchoring component 832 passing through the leveling layer 87. The anchoring component 832 can include an anchor rod with an anchoring hole penetrating the bottom surface 8232 to reach the interior of the bridge deck, an anchor plate abutting against the bottom surface 8232, and an anchoring nut. To facilitate anchor rod positioning, the bridge deck can be pre-set with a rotation center position and corresponding embedded parts. In this embodiment, the base 823 provides a circular top surface 8231 to facilitate the installation of the lower ball joint 821. The base 823 provides a square bottom surface 8232, which is aligned with the vertical center of the top surface 8231. However, the area of ​​the bottom surface 8232 is larger than the circumscribed square of the top surface 8231, gradually increasing from the top surface 8231 to the bottom surface 8232. Multiple reinforcing ribs are provided on the side walls.

[0060] The circular track 83 includes several arc-shaped I-beams 831 and several anchoring components 832 disposed on the outer surface of the I-beams. In this embodiment, the anchoring components 832 anchoring the circular track 83 can be the same as the anchoring components 832 anchoring the lower turntable 82, that is, including anchor rods that penetrate the anchoring holes through the bottom plate of the I-beams to reach the interior of the bridge deck, anchor pads and anchoring nuts abutting against the bottom surface 8232. In the embodiment of this application, four arc-shaped I-beams 831 are spliced ​​together to form the circular track 83. The arc of each arc-shaped I-beam 831 is 90°. When installing each arc-shaped I-beam 831, the center of rotation is taken as the center, and the entire circular track 83 does not exceed the projection area of ​​the upper turntable 81 on the lower bearing surface. It also needs to have intersections with the main crossbeam 811, the side crossbeams 812 and the longitudinal beams 813, so that support feet 84 can be set at each intersection. The upper surface of the curved I-beam 831 serves as a sliding surface 8311, tightly engaging with the support leg 84, while the lower surface serves as an anchoring surface 8312, anchored to the bridge deck. In this embodiment, the radius of the circular track 83 is 4.2m, and the upper surface of the curved I-beam 831 is 0.3m wide. The rotation construction requires the rotating surface to remain level; therefore, a leveling layer 87 is installed between the bottom surface 8232 of the curved I-beam 831 and the bridge deck to compensate for the slope caused by the bridge deck's inclination. In one possible implementation, the leveling layer 87 is filled with epoxy mortar.

[0061] The support leg 84 includes an upper support body 841 and a lower support body 842, which are engaged by a threaded connection. One possible implementation is that the upper support body 841 is a hollow body with an open bottom, and the side wall of the open bottom has an internal thread. Correspondingly, the dimensions of the lower support body 842 can match the bottom opening of the upper support body 841, and an external thread is provided on the outer wall of the lower support body 842, allowing it to mesh with the upper support body 841 for connection. The threaded connection facilitates adjustment of the elevation of the support leg 84. The support leg 84, the annular track 83, and the leveling layer 87 work together to adjust the elevation and levelness of the upper turntable 81, ensuring a tight fit between the upper ball joint 8111 and the lower ball joint 821. In this embodiment, the elevation difference of the upper surface of the leveled arc-shaped I-beam 831 is no greater than 5mm, and the theoretical load-bearing capacity of each support leg 84 is no less than 200 tons.

[0062] Alternatively, the support legs 84 can be configured as "double-cylinder" to improve the support capacity for the upper turntable 81 and the truss being rotated. One possible implementation is that each support leg 84 has an upper support body 841 fitted with two lower support bodies 842, arranged side-by-side along the axis of the annular track 83; the upper support body 841 provides two side-by-side hollow bodies with bottom openings, and these two hollow bodies can be integrally formed; the two lower support bodies 842 are independent of each other and each fits into one of the hollow bodies; the outer surface cross-sectional profile of the integral upper support body 841 can be configured as a waist shape, which can provide both planar and curved mounting surfaces to facilitate the installation of other auxiliary structures on the upper support body 841, such as connecting lugs 844.

[0063] Furthermore, the support leg 84 and the annular track 83 need to fit tightly together so that the support leg 84 can slide on the annular track 83. Therefore, a sliding seat 843 for cooperating with the annular track 83 is also provided at the bottom of the lower support body 842. In this embodiment, the sliding seat 843 includes a fastening plate that can fasten the bottom of the lower support body 842 and the upper surface of the arc-shaped I-beam 831 of the annular track 83 from both sides. A reinforcing plate, polytetrafluoroethylene sliding plate, and grease are filled between the bottom of the lower support body 842 and the upper surface of the arc-shaped I-beam 831 to ensure full fit between the bottom plate of the lower support body 842 and the upper surface of the arc-shaped I-beam 831, thereby eliminating air and reducing sliding friction. The top of the upper support body 841 is connected to the upper turntable 81. The specific connection method can be welding or bolting. The upper turntable 81 can have a pre-set mating part at the position where it connects with the upper support body 841.

[0064] Furthermore, from a top-down perspective, there are several overlapping positions between the annular track 83 and the upper turntable 81. A support foot 84 can be provided at each overlapping position to connect the upper turntable 81 and the annular track 83. When the support foot 84 slides along the annular track 83, it drives the upper turntable 81 to rotate. Preferably, the overlapping positions of the upper turntable 81 and the annular track 83 are evenly distributed on the annular track 83. In this embodiment, there are eight overlapping positions, which are evenly and symmetrically distributed on the annular track 83.

[0065] Furthermore, the side wall of the upper support body 841 of the support leg 84 is provided with a connecting ear plate 844, which is positioned facing the center of the annular track 83. An adjusting strut 845 is provided between the connecting ear plate 844 and the bottom of the upper turntable 81 to improve the support capacity of the support leg 84 for the upper turntable 81. Preferably, the connecting ear plate 844 is positioned facing the upper surface of the annular track 83, and a rotating jacking component 85 is assembled between the connecting ear plate 844 and the annular track 83. The rotating jacking component 85 includes a jacking reaction frame detachably mounted on the annular track 83 and a jacking cylinder connecting the jacking reaction frame and the connecting ear plate 844. In this embodiment, at least two sets of rotating jacking components 85 are provided with the rotational center position as the center of rotational symmetry, serving as the power output source for rotation. In this embodiment, the driving force of each set of rotating jacking components 85 reaches 64 tons. The structure of the rotating jacking component 85 is not specifically limited here.

[0066] refer to Figure 14 The assembly process of the truss rotation system 8 in this application is as follows:

[0067] The embedded parts are installed on the bridge deck based on the preset rotation center position to position the base 823 and the ring track 83. In this implementation, the main material of the embedded parts is Ø fine rolled threaded steel bar. After the steel box girder steel bar is tied, the embedded parts are installed according to the preset height and horizontal position. The error of each installation position is no more than ±5mm.

[0068] Install the lower turntable 82, with its center position falling on the center position of the rotating body, and it needs to be leveled. The relative error of 8231 points on the top surface around the lower ball joint 821 of the lower turntable 82 should not exceed 1mm.

[0069] When installing the circular track 83, it is necessary to ensure that the center of each arc-shaped I-beam 831 coincides with the center of rotation, with an error of no more than 2mm, and the relative elevation difference of the slide surface is no more than 5mm.

[0070] After installing the upper turntable 81 and the lower turntable 82, install the rotating shaft 86 that passes through the lower center hole 822. After confirming that the installation position of the rotating shaft 86 is within the error range, clean the surface of the lower ball joint 821 and apply grease. Hoist the upper turntable 81 above the lower turntable 82 so that the upper center hole 8112 of the upper ball joint 8111 is aligned with the rotating shaft 86. Gently place the upper turntable 81 so that the upper ball joint 8111 and the lower ball joint 821 fit together. After a simple test to ensure that the rotational smoothness between the upper ball joint 8111 and the lower ball joint 821 meets the requirements, seal the edge gaps of the upper ball joint 8111 and the lower ball joint 821 to prevent foreign objects from entering the friction gap of the ball joint.

[0071] Install support foot 84. The top of support foot 84 is bolted to the upper turntable 81, and the bottom of support foot 84 is slidably engaged with the annular track 83. The elevation of support foot 84 can be adjusted by the threaded connection between its upper support body 841 and lower support body 842 to ensure the levelness of the upper turntable 81.

[0072] S2, move the main body of the upward-moving formwork longitudinally towards the construction start end and back to the center position of the rotation;

[0073] After the current span is completed, the upward-moving formwork is opened, and then pushed backward by the longitudinal hydraulic cylinders on the pushing trolley 6. Because the assembled main beam of the bridge will obstruct the structure below the beam of the upward-moving formwork during the lateral movement, the lower hanging beam 3 and the formwork system of the upward-moving formwork need to be dismantled before the lateral movement. To reduce the backward load and speed up the backward movement, the components below the main beam segment of the bridge, such as the lower hanging beam 3 and the formwork system, can be dismantled in advance before the longitudinal backward movement of the upward-moving formwork begins. The lower hanging beam 3 and the formwork system can be dismantled using a truck crane, symmetrically on both sides, and transported in advance to the area below the other span for reinstallation after the upward-moving formwork is rotated. After dismantling the lower hanging beam 3 and the formwork system, the remaining structure is retained as the main body of the upward-moving formwork, which is used as the primary object for in-situ turning and lateral movement.

[0074] In this embodiment, the main body of the upward-moving formwork relies primarily on the middle support leg system 4, the propulsion trolley 6, and the rear longitudinal movement system 7 as support points during the retraction process, with the propulsion trolley 6 serving as the main longitudinal movement drive point. In this embodiment, the retraction distance of the main body of the upward-moving formwork is relatively short, and the positions of the middle support leg system 4, the propulsion trolley 6, and the rear longitudinal movement system 7 can remain unchanged. If the retraction distance is long, it is necessary to alternately adjust the positions of the propulsion trolley 6 and the middle support leg system 4 so that the propulsion trolley 6 and the middle support leg system 4 follow the retraction of the main body of the upward-moving formwork. During this process, the rear longitudinal movement system 7 is located at the tail of the main beam 1 and moves with the main body of the upward-moving formwork. Before the main body of the upward-moving formwork begins to retreat, a rear longitudinal movement system 7, a propulsion trolley 6, and a middle support leg system 4 are sequentially installed from the tail end to the front end. The rear longitudinal movement system 7 and the propulsion trolley 6 are clustered at the tail end of the main beam 1, while the middle support leg system 4 is positioned near the front end, specifically at the center of gravity of the main body of the upward-moving formwork. The propulsion trolley 6 activates the relevant longitudinal movement components at the top of the current pier, driving the main body of the upward-moving formwork to retreat as a whole. The rear longitudinal movement system 7 follows the retreat of the main body of the upward-moving formwork. Retreat stops when the center of gravity of the main body of the upward-moving formwork approaches the center of rotation. Figure 13 As shown.

[0075] S3, after the main body of the upward moving formwork is fixedly connected to the truss rotation system 8, it is rotated 180° horizontally.

[0076] A front temporary support and a rear temporary support are symmetrically set on both sides of the longitudinal bridge at the center of rotation. The center of gravity of the main body of the upward moving formwork is calculated using the pressure values ​​borne by the front temporary support and the rear temporary support. Optionally, force sensors are set on the front temporary support and the rear temporary support. The main body of the upward moving formwork is lifted by the front temporary support and the data of the force sensors on the two temporary support are read. The actual center of gravity of the main body of the upward moving formwork is determined by calculation.

[0077] Based on the center of gravity position, the docking position between the main body of the ascending mobile formwork and the truss rotation system 8 is determined. The docking center is offset by 5-10cm from the tail end of the main body of the ascending mobile formwork based on the center of gravity position. This docking center is directly opposite the rotation center position to achieve a fixed connection with the truss rotation system 8. After confirming the docking center, the lifting height of the temporary support is adjusted to allow operating space for the connection between the upper turntable 81 and the main body of the ascending mobile formwork. After the upper turntable 81 and the main body of the ascending mobile formwork are connected as a whole, the load-bearing structure is transferred, placing the entire weight of the main body of the ascending mobile formwork onto the upper turntable 81. In another implementation, the assembly process of the upper turntable 81 and the support leg 84 is carried out after confirming the docking center of the ascending mobile formwork. Therefore, the lifting height of the temporary support must meet the requirements of the assembly process of the upper turntable 81 and the support leg 84. Figure 14 As shown.

[0078] Before the main body of the upward-moving mold frame is formally rotated, a trial rotation is required to comprehensively check the assembly of the rotating pusher 85, the ball joint, and the annular track 83. During rotation, the oil pump of the rotating pusher 85 slowly supplies oil after the switch is turned on, driving the main body of the upward-moving mold frame to rotate slowly and uniformly until a 180° horizontal rotation is completed. The positions of the front and rear ends of the main body of the upward-moving mold frame are then interchanged. Figure 15 As shown.

[0079] S4, after switching the truss rotation system 8 to the transverse movement system 9, the main body of the upward moving formwork is transversely moved to another frame;

[0080] refer to Figures 16-18 After the main body of the upward-moving formwork is fixedly connected to the truss rotation system 8, the front temporary support and the rear temporary support lose their supporting function for the main body of the upward-moving formwork. The front temporary support and the rear temporary support can be modified into a transverse system 9 spanning another span. The front temporary support is closer to the construction termination end of the current span than the rear temporary support. "Front" and "rear" are only used to distinguish the positional relationship of the temporary support relative to the construction termination end and do not limit the specific structure of the two temporary supports. After the upward-moving formwork is rotated 180°, the tail end of the main body of the upward-moving formwork is moved longitudinally back to the bridge deck at the top of the penultimate pier (pier #44) at the construction termination end.

[0081] A lateral movement system 9 is installed on the top of the penultimate pier (pier #44) and the penultimate pier (pier #43). In this embodiment, the lateral movement system 9 includes a first lateral movement device 9a installed on pier #44 and a second lateral movement device 9b installed on pier #43. Following the principle of proximity, the front temporary support point after the horizontal rotation can be modified into the first lateral movement device 9a, and the rear temporary support point can be modified into the second lateral movement device 9b.

[0082] The first lateral movement device 9a and the second lateral movement device 9b have the same function: to set up a lateral movement track between the pier tops of the assembled bridge main beam and the pier tops of the unassembled bridge main beam, so that the upward-moving formwork can be moved laterally from the current span to another span.

[0083] The lateral movement device of this application includes: a left-side component, a right-side component, and a lateral movement beam connecting the left-side component and the right-side component. The left-side component is installed on top of the assembled bridge main girder, and the right-side component is installed on the pier top of the unassembled bridge main girder or on top of the bridge main girder. The terms "left" and "right" are only used to distinguish between the two components with different functions and do not limit the installation order of the two components or their left and right sides in a specific orientation.

[0084] The left-side assembly includes a left-side extension beam flush with the transverse beam and a transverse trolley mounted on top of the left-side extension beam; the right-side assembly includes a leg tie flat with the transverse beam flush with it and a right-side support column positioned below the leg tie flat. The left-side extension beam, the transverse beam, and the leg tie flat together form a transverse track, allowing the transverse trolley to move from the left-side extension beam across the transverse beam to the leg tie flat. In one possible implementation, the left-side assembly is located below the assembled main beam. The left-side extension beam can be placed on the bridge deck, but to facilitate leveling of the entire transverse track, a support pad can be further added between the left-side extension beam and the bridge deck. The support pad can be made of stacked leveling steel plates. When the pad height is high, an adjustable-height support pad, or at least one of low piers, pad blocks, or pad beams can be used.

[0085] The right-side assembly includes a horizontal support for the legs and a right-side support column. Optionally, the middle support or other temporary support legs can be disassembled and used as the right-side assembly during the lateral movement of the upward-moving formwork. In this case, the left-side extension beam, the lateral beam, and the horizontal support for the legs are fixedly connected to allow the lateral trolley to pass smoothly while supporting the upward-moving formwork. In another embodiment, when the construction end of the front span connects to a side span or approach bridge that has already been poured, the right-side assembly can be placed on the bridge deck, thereby eliminating the need for the right-side support column. The horizontal support for the legs can be placed on the bridge deck, but to facilitate the leveling of the entire lateral track, a support pad can be further added between the horizontal support for the legs and the bridge deck. The support pad can be made of stacked leveling steel plates. When the pad height is high, an adjustable height support pad, or at least one of the following: a low pier, a pad block, or a pad beam, can be used. Furthermore, if the right-side component adopts a relatively independent structure with a central support leg, the left-side extension beam and the transverse beam can be made into an integrated structure using the same material, or the left-side extension beam and the transverse beam can be pre-connected as an integrated structure and then connected to the support leg horizontally.

[0086] In the embodiments of this application, the middle support leg of the upward-moving formwork includes two pairs of support columns arranged along the transverse bridge direction. A transverse support horizontal bracing is provided at the top of each support column. The support columns are connected to the pier top via embedded parts installed on the pier top. Vertical steel strands are also installed on the support horizontal bracing between the support columns to further secure the support horizontal bracing to the pier top. Based on the original function of the middle support leg, the two pairs of transversely arranged support columns are evenly distributed on the pier top, providing sufficient support for the forward movement of the upward-moving formwork and the load. Therefore, there are no significant technical obstacles to disassembling and installing the middle support leg used on the left side to the right side. The embedded parts on the pier top used to fix the support horizontal bracing do not need to be re-installed; they can be configured according to the original requirements for fixing the middle support leg. The middle support leg can be directly used as the right-side component. There is no need to make significant adjustments to the horizontal height of the upward moving formwork during lateral movement, nor is it necessary to replace the power equipment used for lateral movement. The original middle support leg trolley in the upward moving formwork can be used directly. The original cooperation relationship between the middle support leg trolley and the middle support leg can continue to be used. At this time, the middle support leg trolley acts as the lateral movement trolley.

[0087] The horizontal height of the middle support leg, the left extension beam, and the support leg horizontal bracing should be consistent. One possible way to achieve this is to use the height of the middle support leg as a reference. If the middle support leg is not modified into a right-side component and a temporary support leg is used as the right-side component, then the temporary support leg, the support leg horizontal bracing, and the left extension beam can also be configured with the height of the middle support leg as a reference. Using the height of the middle support leg as a reference can largely maintain the alignment of the upward-moving formwork before and after the lateral movement process.

[0088] After the main body of the upward-moving formwork of this application retreats to the top of pier #44 via the rear longitudinal movement system 7, the first lateral movement device 9a is erected at the side span or approach bridge with a double-span bridge deck. One possible implementation is to disassemble and reinstall the propulsion trolley 6 onto the top of pier #44, and install lateral tracks on the top of pier #44 of the current span and the top of pier #44 of the other span to form the first lateral movement device 9a, enabling the propulsion trolley 6 to move laterally from the current span to the other span. The first lateral movement device 9a includes a first left span assembly disposed on the current span, a first right span assembly disposed on the other span, and a first lateral movement beam 93 connecting the first left span assembly and the first right span assembly; the first left span assembly includes a first left-side extension beam 91 flush with the first lateral movement beam 93 and a propulsion trolley 6 mounted on top of the first left-side extension beam 91; the first right span assembly includes a first support leg 92 flush with the first lateral movement beam 93.

[0089] The second lateral movement device 9b is erected on the top of pier #43. One possible implementation is through modification of the middle support leg system 4. The middle support leg system 4 includes a middle support leg and a middle support leg trolley mounted on the middle support leg. The middle support leg is disassembled and reinstalled on the top of pier #43 of another span. A lateral movement track extends from the middle support leg to the middle support leg trolley, forming the second lateral movement device 9b, enabling the middle support leg trolley to move laterally from the current span to the other span. The second lateral movement device 9b includes a second left span assembly located in the current span, a second right span assembly located in the other span, and a second lateral movement beam 95 connecting the second left span assembly and the second right span assembly. The second left span assembly includes a second left extension beam 94, which is flush with the second lateral movement beam 95, and a middle support leg trolley mounted on top of the second left extension beam 94. The second right span assembly includes a middle support leg flush with the second lateral movement beam 95.

[0090] The synchronous drive of the propulsion trolley 6 and the middle support leg trolley allows the main body of the upward-moving formwork to move laterally from the left (current) panel to the right (other) panel. After the lateral movement is complete, temporary structures such as the support leg horizontal bracing, lateral beam, and left extension beam are disassembled, while the middle support leg, middle support leg trolley, and propulsion trolley 6 are retained for reassembly with the main body of the upward-moving formwork to form a complete upward-moving formwork. To assemble the complete upward-moving formwork, the previously disassembled lower hanging beam 3 and formwork system need to be reinstalled, with installation requirements similar to disassembly, ensuring symmetrical installation. After readjustment, the upward-moving formwork can be put into use. When put back into use, the construction end of the current panel is used as the starting point for the construction of the other panel, and construction proceeds in reverse.

[0091] In summary, this application provides a method for in-situ turning and lateral movement of an upward-moving formwork, comprising the following steps: installing a truss rotation system at the rotation center position of the current span; longitudinally moving the main body of the upward-moving formwork towards the construction start end and then back to the rotation center position; fixing the main body of the upward-moving formwork to the truss rotation system and then performing a 180° horizontal rotation; switching the truss rotation system to a lateral movement system and then laterally moving the main body of the upward-moving formwork to another span. This method, by turning the upward-moving formwork in situ at the construction end end before lateral movement, reduces adverse effects on the overall structure of the upward-moving formwork, helps maintain its alignment, and helps ensure the assembly alignment of the bridge main beam.

[0092] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in related technologies that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0093] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0094] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0095] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0096] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0097] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A construction method for in-situ turning and lateral shifting of an upward-moving formwork, characterized in that, The upward-moving formwork includes a main beam, a nose beam, front outriggers, a middle outrigger system, a propulsion trolley, a rear longitudinal movement system, a lower hanging beam, a formwork system, and a hydraulic system. The front end of the main beam connects to the rear end of the nose beam, the front end of the nose beam is supported by the front outriggers, the rear end of the main beam is supported by the rear longitudinal movement system and the propulsion trolley, and the front end of the main beam is supported by the middle outrigger system near its connection with the nose beam. The entire upward-moving formwork is symmetrically arranged relative to the longitudinal direction of the bridge. The main beam includes two symmetrical beams connected by an upper crossbeam. One side of each beam is connected to the lower hanging beam. The lower hanging beams on both sides jointly support the formwork system, and the lower hanging beams can separate to both sides and close to the middle to adapt to the passage requirements during bridge assembly. The middle outrigger system includes middle outriggers and a middle outrigger trolley mounted on the middle outriggers. The construction method includes the following steps: Install the truss rotation system at the rotation center position of the current span; The main body of the upward-moving formwork is moved longitudinally backward towards the construction start end to the center position of the rotation; before moving the main body of the upward-moving formwork towards the construction start end to the center position of the rotation, the lower hanging beam and the formwork system are disassembled, and the other structures are retained as the main body of the upward-moving formwork. After the main body of the upward-moving formwork is fixedly connected to the truss rotation system, it is rotated 180° horizontally, including: symmetrically setting a front temporary support and a rear temporary support on both sides of the longitudinal bridge at the rotation center position; calculating the center of gravity position of the main body of the upward-moving formwork using the pressure values ​​borne by the front temporary support and the rear temporary support; confirming the docking position of the main body of the upward-moving formwork and the truss rotation system based on the center of gravity position; after the main body of the upward-moving formwork is fixedly connected to the truss rotation system, the front temporary support and the rear temporary support are respectively modified into a transverse sliding system spanning the other side. After switching the truss rotation system to a lateral movement system, the main body of the upward-moving formwork is laterally moved to another section. The lateral movement system includes a left section assembly, a right section assembly, and a lateral movement beam connecting the left and right sections. The left section assembly is installed on the current section, and the right section assembly is installed on the other section. The lateral movement beam is supported by the front temporary support point and / or the rear temporary support point as support columns. The front temporary support point or the rear temporary support point includes the middle support leg of the upward-moving formwork.

2. The method as described in claim 1, characterized in that, The rotation center is located on the bridge deck at the top of the second-to-last pier at the end of the current span's construction.

3. The method as described in claim 1, characterized in that, The truss rotation system includes: an upper turntable for supporting the main body of the upward-moving formwork, with an upper ball joint at its center; a lower turntable fixed at the center of the rotation, with a lower ball joint on its top surface that engages with the upper ball joint; an annular track, positioned horizontally and flush with the center of the rotation; support legs fixed below the upper turntable and capable of sliding along the annular track; and a rotation jacking component for jacking the support legs, positioned between the support legs and the annular track.

4. The method as described in claim 1, characterized in that, The step of moving the main body of the upward-moving mobile formwork longitudinally backward toward the construction starting end to the rotation center position includes: driving the propulsion trolley near the tail end to move the main body of the upward-moving mobile formwork longitudinally backward toward the construction starting end to the rotation center position.

5. The method as described in claim 1, characterized in that, The step of determining the docking position of the main body of the upward-moving formwork and the rotation system of the truss based on the center of gravity position includes: offsetting the center of gravity position by 5~10cm towards the tail end of the main body of the upward-moving formwork as the docking center, and the docking center is directly opposite the rotation center position to achieve a fixed connection with the rotation system of the truss.

6. The method as described in claim 1, characterized in that, The step of fixing the main body of the upward-moving formwork to the truss rotation system and then rotating it 180° includes: rotating the main body of the upward-moving formwork 180°, then moving the tail end of the main body of the upward-moving formwork longitudinally back to the bridge deck at the top of the penultimate pier at the construction termination end; and setting the transverse movement system at the top of the penultimate pier and the top of the second-to-last pier.

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