Segmental pier body takes beam beam under the construction method of erecting and erecting integrated machine

Abstract

The application provides a segmental beam pier body beam taking beam under-transporting and erecting construction method and a transporting and erecting integrated machine, the method comprises the following steps: constructing a foundation and a lower structure, and installing a starting segmental beam; assembling the transporting and erecting integrated machine on the erected segmental beam, the equipment can be longitudinally moved and anchored; fixing a beam storage position under the bridge, transporting the segmental beam to be assembled to the beam storage position; longitudinally moving the equipment to the beam taking position and anchoring, vertically lifting the segmental beam to the bridge surface elevation; longitudinally moving the equipment carrying the segmental beam to the design installation position directly above; aligning, splicing and applying prestress, and completing the installation; circulating the above steps and symmetrically installing multiple segmental beams. The application further discloses the transporting and erecting integrated machine for realizing the method, which comprises a vehicle frame, a walking mechanism, an anchoring mechanism, a hydraulic supporting leg, a crown block, a hoisting device and a lifting frame. The application only needs to occupy a fixed beam storage position under the bridge, vertically lifts and longitudinally moves to complete the segmental beam installation, has zero influence on the existing road traffic, does not need to interrupt the traffic, is safe and reliable, has high construction efficiency, and has strong popularization.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, specifically to a method for constructing segmental beam piers by removing beams and transporting them under the beam. Background Technology

[0002] Precast segmental beam cantilever assembly is a highly efficient method for constructing bridge superstructures. It involves assembling precast concrete segmental beams segment by segment at the bridge site to form a bridge. The cantilever assembly method for precast segmental beams uses either a bridge deck crane or a crawler crane for installation, and these are currently the two most commonly used installation methods.

[0003] Whether using a bridge crane or a crawler crane for installation, the segmental beams need to be transported by transport vehicles to the area below or to the side of the pier to be installed for lifting. This method severely occupies and relies on the space under the bridge. If there is an existing road under the bridge, this method will affect the traffic on the existing road. When the bridge crosses existing urban roads, rivers, railways, or areas with complex terrain, the bridge construction needs to overcome the constraints of terrain, traffic, and environment. The construction period is long, the project cost is high, and there are also safety and social factors involved.

[0004] Against this backdrop, the applicant proposed a new technical solution. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method for constructing segmental beam pier-mounted beams and their undercarriage transport, the technical solution of which includes: A method for constructing segmental beam piers by removing beams and transporting them under the pier includes the following steps: S1. Construction of bridge foundations and substructures; S2. Construction and installation of any segment of beam; S3. Assemble the beam transport equipment on the erected segmental beams. The equipment has a vertical lifting mechanism and can move longitudinally on the installed segmental beams and can be anchored on the installed segmental beams. S4. Set the segment beam as the beam retrieval position, set the position under the segment beam as the beam storage position, and transport the remaining segment beams to be assembled to the beam storage position. S5. The beam transport and erection equipment is moved to the beam picking position and anchored. The segment beam to be assembled is vertically lifted from the space under the beam to the bridge deck elevation through the vertical lifting mechanism. S6. Release the anchorage and move the beam segment longitudinally with the beam segment to directly above its designed installation position. S7. Re-anchor, align and splice the lifted segment beam with the erected beam segment and apply prestress to complete the installation of one segment; S8, repeating S5-S7, completes the vertical lifting, longitudinal movement, alignment and splicing of multiple segment beams, and the installation of multiple segment beams must be symmetrical.

[0006] According to an embodiment of the present invention, in a method for constructing a segmental beam pier body by taking the beam from the bridge and transporting it under the beam, in step S5, the vertical lifting mechanism directly takes the segmental beam from the beam transport vehicle or lifting equipment under the bridge.

[0007] According to an embodiment of the present invention, in a method for constructing a segmental beam pier by removing and transporting the beam under the pier, step S8, symmetrical installation means: taking the erected segmental beam as the center, installing segmental beams alternately or synchronously on the left and right sides to maintain the force balance on both sides of the pier.

[0008] A segmental beam pier removal and beam under-excavation integrated machine is used to realize the segmental beam pier removal and beam under-excavation construction method described in any of the above-mentioned methods, including: The frame is mounted on top of the already erected segmental beams; A traveling mechanism is located at the bottom of the vehicle frame and is used to drive the vehicle frame to move longitudinally on the erected segmental beams; Anchoring mechanism for anchoring the vehicle frame to the erected segmental beam; Hydraulic outriggers, located at the bottom of the vehicle frame, are used to support the vehicle frame and unload the load of the traveling mechanism in an anchored state. The overhead crane is slidably mounted on the top of the frame and can move along the length of the frame; The lifting device is fixedly installed on the overhead crane; The gantry, connected to the lifting device via steel wire rope, is used to lift the segmental beams to be assembled.

[0009] According to an embodiment of the present invention, the segmental beam pier body beam removal and beam under-beam erection integrated machine has at least two sets of walking mechanisms, which are symmetrically arranged at the bottom of the frame; at least two sets of anchoring mechanisms, which are respectively arranged at both ends of the frame; and at least two sets of hydraulic outriggers, which are respectively arranged at both ends of the frame.

[0010] According to an embodiment of the present invention, the segmental beam pier body removal and beam under-beam erection integrated machine includes a lifting device comprising at least two sets of lifting winches, wherein the wire ropes of the lifting winches extend vertically downward and are connected to the top of the lifting frame, and the bottom of the lifting frame is provided with a plurality of connecting parts corresponding one-to-one with the pre-embedded lifting points on the segmental beam to be lifted.

[0011] According to an embodiment of the present invention, the segmental beam pier body removal and beam under-beam erection integrated machine has a walking mechanism including a walking wheel and a drive motor. The walking wheel makes rolling contact with the top surface of the erected segmental beam, and the drive motor is connected to the walking wheel for driving the walking wheel to move longitudinally along the erected segmental beam.

[0012] According to an embodiment of the present invention, the integrated machine for transporting and erecting segmental beams from piers includes a hydraulic outrigger comprising a hydraulic cylinder and a support base. The cylinder body of the hydraulic cylinder is fixed to the bottom of the frame, and the support base is fixed to the end of the piston rod of the hydraulic cylinder, for contacting the top surface of the erected segmental beam in an anchored state.

[0013] According to an embodiment of the present invention, the segmental beam pier body removal and beam under-beam erection integrated machine has an anchoring mechanism including an anchoring rod and a locking nut. The lower end of the anchoring rod passes through the frame and is connected to the pre-embedded anchor on the erected segmental beam. The locking nut is screwed onto the anchoring rod to press and fix the frame onto the erected segmental beam.

[0014] According to an embodiment of the present invention, the segmental beam pier body beam taking and erection machine adopts a box-type steel structure. The length of the frame is greater than or equal to the sum of the longitudinal widths of two adjacent segmental beams, so as to meet the requirement of the overhead crane carrying the segmental beam to be assembled longitudinally from the beam taking position to the designed installation position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a method for constructing segmental beam piers by transporting and erecting beams under the pier, along with an integrated transport and erection machine. The method includes: constructing the foundation and substructure; installing the initial segmental beam; assembling the integrated transport and erection machine on the already erected segmental beam, the machine being able to move longitudinally and be anchored; fixing a beam storage location under the bridge and transporting the segmental beam to be assembled to this location; moving the machine longitudinally to the beam retrieval location and anchoring it, then vertically lifting the segmental beam to the bridge deck elevation; moving the machine longitudinally with the segmental beam directly above the designed installation position; aligning, splicing, and applying prestress to complete the installation; repeating the above steps and symmetrically installing multiple segmental beams. This invention also discloses the integrated transport and erection machine for implementing this method, including a frame, a traveling mechanism, an anchoring mechanism, hydraulic outriggers, a crane, a lifting device, and a lifting frame. This invention only requires a fixed beam storage location under the bridge, completing the segmental beam installation through vertical lifting and longitudinal movement, with zero impact on existing road traffic, no traffic interruption, safety and reliability, high construction efficiency, and strong applicability. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the integrated machine for transporting and erecting segmental beams from piers in an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the integrated machine for transporting and erecting segmental beams from piers in an embodiment of the present invention. Figure 2 ; Figure 3This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 4 ; Figure 7 This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 5 ; Figure 8 This is a schematic diagram of the steps in the segmental beam pier removal and beam lowering construction method in an embodiment of the present invention. Figure 6 .

[0017] Explanation of key component symbols: 10. Chassis; 20. Overhead crane; 30. Lifting frame; 40. Traveling wheels; 50. Anchor rods; 60. Locking nuts; 70. Hydraulic outriggers; 80. Lifting device; 90. Segmental beam. Detailed Implementation

[0018] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0019] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Example 1 This embodiment provides a method for constructing segmental beams by removing beams from under the pier and transporting them under the beam. This method is particularly suitable for the cantilever assembly of segmental beams (90° cantilever) in urban bridges, overpasses, and other bridges where space under the bridge is limited. Figure 3-8 The flowchart shown illustrates the method, which includes the following steps: S1, Construction of bridge foundations and substructure Following conventional bridge construction techniques, the construction of the substructure of the bridge, including pile foundations, abutments, piers, and abutments, is completed to provide a supporting foundation for the installation of the superstructure segmental beams. S2, Construction and installation of any segment of beam 90 like Figure 3 As shown, the initial segment beam 90 is first installed (in this embodiment, the 0-1# block segment beam 90 on the top of the pier); this segment beam 90 can be installed on the top of the pier using conventional hoisting equipment (such as a truck crane or crawler crane) as the reference beam segment for subsequent cantilever assembly; S3. Assemble the beam transport and erection equipment on the already erected segmental beam 90. like Figure 3 As shown, on the bridge deck of the pre-installed starting segment beam 90 (in this embodiment, the 0-1# segment beam 90 at the pier top), a beam segment erection equipment is assembled and transported on-site. This equipment has a vertical lifting mechanism and can move longitudinally (i.e., along the length of the segment beam 90) on the installed segment beam 90. Simultaneously, the equipment is equipped with an anchoring mechanism to securely anchor it to the installed segment beam 90, ensuring stability during lifting and longitudinal movement. S4. Set the beam retrieval and storage locations, and transport 90 sections of beam to be assembled. like Figure 3 As shown, a specific position on the erected segmental beam 90 is designated as the "beam retrieval position" (segmental beam 90 #1 in the embodiment). This beam retrieval position is usually located on one side of the bridge deck (e.g., near the edge of the pier), so that the vertical lifting mechanism is directly facing the space under the bridge below at this position. At the same time, the ground (or space under the bridge) below the segmental beam 90 is designated as the "beam storage position". The remaining segmental beams 90 to be assembled are transported one by one to the storage position along the existing road or temporary access road under the bridge using a beam transport vehicle under the bridge, and temporarily parked. S5. Move to the beam removal position and anchor it; vertically lift the segmental beam 90 degrees. like Figure 3 , 4 As shown, the beam transport and erection equipment moves longitudinally on the erected segment beam 90. After reaching the beam retrieval position, it stops and the anchoring mechanism is activated to securely lock the equipment onto the erected segment beam 90. Then, the vertical lifting mechanism is activated to lower the lifting device 80 to the beam storage position and directly retrieve the segment beam 90 to be assembled (in this embodiment, segment beam 90 #2) from the beam transport vehicle or lifting device under the bridge. Subsequently, the vertical lifting mechanism lifts the segment beam 90 vertically from the space under the beam to the bridge deck elevation (i.e., a height approximately level with the top surface of the erected beam segment). S6. Release the anchor and move longitudinally to the designed installation position. like Figure 5 As shown, the anchoring mechanism is released, and the beam transport equipment carries the beam segment 90 and moves longitudinally along the bridge deck where the beam segment 90 has been erected until the beam segment 90 is transported to the front end of its designed installation position, which is the front end of the cantilever assembly and is located at the assembly position adjacent to the erected beam segment. S7. Re-anchor, align, splice, and apply prestress. like Figure 6 As shown, after the equipment is moved into place, the anchoring mechanism is restarted to anchor the equipment onto the erected segment beam 90. At this time, the height of the segment beam 90 is finely adjusted by the vertical lifting mechanism to connect the segment beam 90 to be assembled (in this embodiment, segment beam 90 #2) with the erected beam segment, thus completing the installation of the segment beam 90. S8, repeating S5-S7, symmetrically installing multiple segmental beams 90 like Figure 7 , 8 As shown, repeat steps S5 to S7 above to sequentially complete the vertical lifting, longitudinal movement, alignment, and splicing of the remaining segmental beams 90 to be assembled. It is particularly important to note that the installation of multiple segmental beams 90 must be carried out symmetrically. Symmetrical installation means that, with the already erected segmental beam 90 (usually the 0-1# segmental beam 90 at the pier top) as the center, segmental beams 90 are installed alternately or simultaneously on both the left and right sides. For example, after installing a segmental beam 90 on the left, a segmental beam 90 must be installed on the right to maintain a basic balance of cantilever loads on both sides of the pier and prevent the pier from overturning due to eccentric loading.

[0023] In this invention, a fixed location is pre-selected under the bridge as the beam storage location, without requiring the entire longitudinal passage under the bridge to remain open or to be closed to traffic for a long time as in traditional processes. All subsequent operations, such as the vertical lifting, longitudinal movement, and alignment splicing of the segmental beam 90, are completed in the air or on the already erected beam segment, without occupying the traffic clearance under the bridge. There is no need to interrupt traffic for a long time or build expensive temporary access roads. The impact on existing traffic is close to zero, and the safety risks are completely controllable.

[0024] It should be noted here that when: 1. When the assembly length of a single cantilever exceeds the maximum longitudinal stroke of the transport and erection machine (i.e., the coverage area corresponding to the frame length), a fixed beam-taking area needs to be added, and a specific position on any erected segment beam 90 should be set as the "beam-taking position", and the ground (or the space under the bridge) below the segment beam 90 should be set as the "beam-storage position". 2. When the original fixed beam storage location cannot be used for a long period of time due to temporary traffic control, road construction or other reasons, a new "beam storage location" can be designated. 3. Multi-pier joint operation scenario: When multiple piers in the same section are constructed simultaneously, an independent fixed beam-taking area can be set up at the starting segment of the beam on the top of each pier to realize parallel operation of multiple piers.

[0025] All beam removal areas must be located on the top surface of prestressed beam segments that have reached 100% of their design strength. Bearing capacity calculations must be performed in advance to ensure the beams can withstand the entire load of the transport equipment and the beam segments. Switching between beam removal areas must be carried out under completely symmetrical stress conditions on both sides of the pier; eccentric switching is strictly prohibited.

[0026] It should be noted that in this invention, the longitudinal direction is along the length of the bridge (the front and rear direction of the cantilever assembly), and the transverse direction is perpendicular to the length of the bridge (the left and right width direction of the bridge). The solution of this invention achieves complete interference-free operation between the moving parts of the beam segments to be hoisted and the beam transport and erection equipment and the erected beam segments, piers, and other objects through the combined application of existing mature technologies. All anti-interference measures adopt mature technologies commonly used in the bridge construction and lifting industry, and are achieved through a combination of four conventional methods: space reservation, path constraint, attitude control, and safety early warning.

[0027] Example 2 This embodiment provides an integrated machine for transporting and erecting segmental beams from piers to lower beams, used to implement the above method. For example... Figure 1 , 2 As shown, the equipment mainly includes: a frame 10, a traveling mechanism, an anchoring mechanism, hydraulic outriggers 70, a crane 20, a lifting device 80, and a gantry 30.

[0028] The frame 10 adopts a box-type steel structure, which has high strength and rigidity. The length of the frame 10 is designed to be greater than or equal to the sum of the longitudinal widths of two adjacent segment beams 90, thereby ensuring that the overhead crane 20 can carry the segment beams 90 to be assembled longitudinally from the beam-picking position on one side of the bridge deck to the designed installation position on the other side (or in the middle). The frame 10 is set entirely above the erected segment beams 90.

[0029] The traveling mechanism is located at the bottom of the frame 10, and there are at least two sets arranged symmetrically. Specifically, each set of traveling mechanism includes traveling wheels 40 and a drive motor. The traveling wheels 40 roll in contact with the top surface of the erected segment beam 90, and the drive motor is driven by the traveling wheels 40 to drive the frame 10 to move longitudinally along the erected segment beam 90. The traveling mechanism can be wheel-rail type, tire type, or tracked type.

[0030] There are at least two sets of anchoring mechanisms, each located at one end of the frame 10 (corresponding to the longitudinal edges of the bridge). Each set of anchoring mechanisms includes an anchoring rod 50 and a locking nut 60. The lower end of the anchoring rod 50 passes through a guide hole on the frame 10 and connects to the pre-embedded anchors (such as anchor bolt holes or anchor seats) on the erected segment beam 90. The locking nut 60 is screwed onto the anchoring rod 50, and after tightening, it can press and fix the frame 10 onto the erected segment beam 90, thereby providing stable support during critical stages of lifting or longitudinal movement.

[0031] There are at least two sets of hydraulic outriggers 70, respectively located at the bottom of both ends of the frame 10. Each set of hydraulic outriggers 70 includes a hydraulic cylinder and a support base. The cylinder body of the hydraulic cylinder is fixed to the bottom of the frame 10, and the support base is fixed to the end of the piston rod of the hydraulic cylinder. When the equipment needs to be anchored, the hydraulic outriggers 70 extend, causing the support base to abut against the top surface of the erected segmental beam 90, thereby lifting the frame 10 and causing the traveling wheels 40 of the traveling mechanism to detach from the bridge deck (or unload the load), preventing the traveling mechanism from being stressed during anchoring. When movement is required, the hydraulic outriggers 70 retract, and the traveling wheels 40 resume bearing the load.

[0032] The overhead crane 20 is slidably mounted on top of the frame 10, and a track is arranged along the length of the frame 10 (i.e., the longitudinal direction of the bridge), along which the overhead crane 20 can move. The overhead crane 20 is used to carry the lifting device 80 and adjust it between different longitudinal positions to accommodate the lifting needs of beam segments 90 of different lengths. In this embodiment, since the main movement is longitudinal, the overhead crane 20 can be locked in a certain longitudinal position.

[0033] The lifting device 80 is fixedly mounted on the overhead crane 20. The lifting device 80 includes at least two sets of lifting winches (e.g., two or four), whose wire ropes extend vertically downwards and are connected to the top of the gantry 30. The multiple sets of lifting winches operate synchronously to ensure the smooth lifting and lowering of the gantry 30.

[0034] The hanger 30 is a frame structure with multiple connecting parts at its bottom. These connecting parts correspond one-to-one with the pre-embedded lifting points on the segment beam 90 to be assembled. The design of the hanger 30 ensures that the segment beam 90 is subjected to uniform stress during lifting, thus avoiding damage.

[0035] Brief description of the work process: First, the equipment moves to the beam-retrieving position via the traveling mechanism. Then, the hydraulic outriggers 70 extend to lift the frame 10, raising the traveling wheels 40 off the ground. Next, the anchoring mechanism locks in place, securing the frame 10 to the bridge deck. The lifting device 80 lowers the lifting frame 30 to the beam storage position under the bridge, connects the segment beam 90 to be assembled, and then lifts it vertically to the bridge deck elevation. Subsequently, the anchoring is released, the hydraulic outriggers 70 retract, the traveling wheels 40 touch the ground, and the equipment carries the segment beam 90 longitudinally to the designed installation position. The hydraulic outriggers 70 are lifted and anchored again, and the segment beam 90 is finely aligned to complete the splicing. By repeating the above actions, the symmetrical installation of multiple segment beams 90 can be completed.

[0036] This invention provides an integrated machine for transporting and erecting segmental beams (90 piers) to achieve the above-mentioned method. It integrates a frame 10, a traveling mechanism, an anchoring mechanism, hydraulic outriggers 70, a crane 20, a lifting device 80, and a lifting frame 30. The traveling mechanism, anchoring mechanism, and hydraulic outriggers 70 work synergistically: during beam removal and installation, the hydraulic outriggers 70 extend to lift the frame 10, causing the traveling wheels 40 to detach from the bridge deck (unloading). Simultaneously, the anchoring mechanism locks the entire machine onto the erected segmental beam (90). At this time, the entire load of the segmental beam (90) is transferred to the beam body through the anchoring mechanism, and the traveling mechanism is not subjected to stress. During longitudinal movement, the hydraulic outriggers 70 retract, the traveling wheels 40 bear the load and drive the entire machine to slide smoothly, and the anchoring mechanism unlocks. Through this alternating support method, the load of the segmental beam (90) is not continuously borne by the traveling mechanism or a single component, greatly reducing the burden on the traveling mechanism and avoiding the overturning risk of traditional bridge cranes due to shifting center of gravity or long-term load. Meanwhile, the coordination between the anchoring mechanism and the hydraulic outriggers 70 enables the equipment to form a stable fixed gantry 30 during lifting and installation, significantly enhancing the overall anti-overturning capacity and fully guaranteeing construction safety and stability.

[0037] All equivalent substitutions or simple modifications based on the concept of this invention fall within the protection scope of this invention. Of course, this invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention; all such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A method for constructing segmental beam piers by removing beams and transporting them under the pier, characterized in that, Includes the following steps: S1. Construction of bridge foundations and substructures; S2. Construction and installation of any segment of beam (90); S3. Assemble the beam transport equipment on the erected segmental beam (90). The equipment has a vertical lifting mechanism and can move longitudinally on the installed segmental beam (90) and can be anchored on the installed segmental beam (90). S4. Set the segment beam as the beam taking position, set the position under the segment beam as the beam storage position, and transport the remaining segment beams (90) to be assembled to the beam storage position. S5. The beam transport and erection equipment is moved to the beam picking position and anchored. The segment beam (90) to be assembled is vertically lifted from the space under the beam to the bridge deck elevation through the vertical lifting mechanism. S6. Release the anchorage and move the beam segment (90) longitudinally to directly above its designed installation position using the beam transport and erection equipment. S7. Re-anchor, align and splice the lifted segment beam (90) with the erected beam segment and apply prestress to complete the installation of one segment; S8, cycle S5--S7, complete the vertical lifting, longitudinal movement, alignment and splicing of multiple segment beams (90), and the installation of multiple segment beams (90) must be symmetrical.

2. The method for constructing a segmental beam pier body by removing the beam and transporting it under the pier as described in claim 1, characterized in that, In step S5, the vertical lifting mechanism directly obtains the segment beam (90) from the beam transport vehicle or lifting equipment under the bridge.

3. The method for constructing a segmental beam pier body by removing the beam and transporting it under the beam as described in claim 1, characterized in that, In step S8, symmetrical installation means: with the erected segmental beam (90) as the center, the segmental beams (90) are installed alternately or synchronously on the left and right sides to maintain the force balance on both sides of the pier.

4. A segmental beam pier body removal and beam lowering erection integrated machine, used to realize the segmental beam (90) pier body removal and beam lowering erection construction method as described in any one of claims 1 to 3, characterized in that, include: The frame (10) is positioned above the erected segmental beam (90); The traveling mechanism is located at the bottom of the frame (10) and is used to drive the frame (10) to move longitudinally on the erected segmental beam (90); An anchoring mechanism for anchoring the frame (10) to the erected segmental beam (90); Hydraulic outriggers (70) are provided at the bottom of the frame (10) for supporting the frame (10) in an anchored state and unloading the load of the walking mechanism; The overhead crane (20) is slidably mounted on the top of the frame (10) and can move along the length of the frame (10); The lifting device (80) is fixedly installed on the overhead crane (20); The gantry (30) is connected to the lifting device (80) by a wire rope and is used to lift the segment beam (90) to be assembled.

5. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The walking mechanism has at least two sets and is symmetrically arranged at the bottom of the frame (10); the anchoring mechanism has at least two sets and is respectively arranged at both ends of the frame (10); the hydraulic outriggers (70) have at least two sets and are respectively arranged at both ends of the frame (10).

6. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The lifting device (80) includes at least two sets of lifting winches. The wire ropes of the lifting winches extend vertically downward and are connected to the top of the hanger (30). The bottom of the hanger (30) is provided with multiple connection parts that correspond one-to-one with the pre-embedded lifting points on the segmental beam (90) to be lifted.

7. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The walking mechanism includes a walking wheel (40) and a drive motor. The walking wheel (40) rolls in contact with the top surface of the erected segment beam (90). The drive motor is connected to the walking wheel (40) for driving the walking wheel (40) to move longitudinally along the erected segment beam (90).

8. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The hydraulic outrigger (70) includes a hydraulic cylinder and a support seat. The cylinder body of the hydraulic cylinder is fixed to the bottom of the frame (10), and the support seat is fixed to the end of the piston rod of the hydraulic cylinder for contacting the top surface of the erected segmental beam (90) in the anchored state.

9. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The anchoring mechanism includes an anchoring rod (50) and a locking nut (60). The lower end of the anchoring rod (50) passes through the frame (10) and is connected to the pre-embedded anchor on the erected segment beam (90). The locking nut (60) is screwed onto the anchoring rod (50) to press and fix the frame (10) onto the erected segment beam (90).

10. The segmental beam pier body beam removal and erection integrated machine according to claim 4, characterized in that, The frame (10) adopts a box-type steel structure. The length of the frame (10) is greater than or equal to the sum of the longitudinal widths of two adjacent segment beams (90) to meet the requirement that the overhead crane (20) carries the segment beams (90) to be assembled longitudinally from the beam picking position to the designed installation position.

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