A steel-concrete hybrid beam continuous rigid frame bridge cantilever pouring hoisting and erecting integrated equipment

Abstract

The application discloses a kind of steel-concrete composite beam continuous rigid frame bridge cantilever casting hoisting erection integrated equipment, it includes base, cantilever frame, slide beam frame, formwork system, hoisting device and suspension lifting device;The hoisting device and the suspension lifting device are respectively slidably connected to the upper and lower two end surfaces of slide beam frame;The formwork system is connected to suspension lifting device, and the formwork system is adjusted in height by suspension lifting device;When carrying out concrete segment beam cycle construction, the lifting appliance of hoisting device is received on the upper side of slide beam frame, to avoid the transverse path of suspension lifting device;When carrying out steel structure in place construction of steel-concrete combined section, move suspension lifting device and formwork system, to avoid vertical hoisting path of steel structure;When carrying out midspan steel beam construction, formwork system is lifted to main truss high place by suspension lifting system, to avoid midspan steel beam installation position.The application has the effect of improving construction efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of bridge construction, and in particular to an integrated equipment for the cantilever hoisting and erection of a continuous rigid frame bridge with steel-concrete composite beams. Background Technology

[0002] Steel-concrete composite continuous beam (rigid frame) bridges are a new type of bridge structure that has been developed in recent years. They make full use of the characteristics of continuous beam bridges, such as simple structure, clear stress, and mature construction methods. Steel structure bridges have the advantages of high material strength, light weight, and factory processing. They have good structural advantages and practical application value in the continuous breakthrough of large span continuous beam (rigid frame) bridge types.

[0003] In related technologies, the construction methods for steel-concrete hybrid continuous beam (rigid frame) bridges generally involve two sets of independent equipment with different functions to carry out the two steps of concrete pouring and steel structure hoisting. One construction method is to pour concrete beam segments using a triangular hanging basket cantilever and lift steel beams using multiple triangular scaffolds. Another method uses a hanging basket cantilever pouring and a bridge deck crane to lift steel beams. After the continuous pouring of concrete beams is completed, the formwork and triangular hanging basket cantilever are removed, and then the hoisting equipment is replaced to lift the mid-span steel beam to the design elevation and fix it to the concrete beam segment.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: the equipment needs to be switched between the two processes, the process interval is relatively long, and the construction efficiency is low; therefore, there is still room for improvement. Summary of the Invention

[0005] To improve construction efficiency, this invention provides an integrated equipment for the cantilever erection of a continuous rigid frame bridge made of steel-concrete composite beams.

[0006] The present invention provides an integrated equipment for the cantilever erection of a continuous rigid frame bridge made of steel-concrete composite beams, which adopts the following technical solution:

[0007] An integrated equipment for the cantilever hoisting and erection of a steel-concrete composite beam continuous rigid frame bridge includes a base that moves along the bridge construction direction.

[0008] A cantilever frame, wherein the inclined lower end of the cantilever frame is mounted on the upper surface of the base, and the inclined upper end of the cantilever frame extends out of the periphery of the base;

[0009] A sliding beam frame, which is horizontally installed at the inclined upper end of the cantilever frame;

[0010] The hoisting device and the suspension lifting device are slidably connected to the upper and lower end faces of the sliding beam frame, respectively.

[0011] A template system, the template system being connected to a suspension lifting device, the template system being height-adjusted by the suspension lifting device;

[0012] During the cyclic construction of concrete segmental beams, the lifting equipment is stored on the upper side of the sliding beam frame to avoid the lateral movement path of the suspended lifting device; during the placement construction of the steel structure in the steel-concrete composite section, the suspended lifting device and formwork system are moved to avoid the vertical lifting path of the steel structure; during the construction of the mid-span steel beam, the formwork system is lifted to the height of the main truss by the suspended lifting system to avoid the installation position of the mid-span steel beam.

[0013] By adopting the above technical solutions, under integrated equipment operation, the switching between segmental beam cantilever casting and steel beam hoisting tasks can be achieved only through partial structural adjustments, greatly reducing the safety risks of construction process transitions. Furthermore, it not only reduces the number of equipment but also the amount of materials required for large-scale cast-in-place supports in the side spans, lowering construction costs. Simultaneously, the orderly coordination between the vertical hoisting of the steel structure in the steel-concrete composite section and the lateral movement of the formwork system ensures a tight connection between the construction of the concrete segmental beams and the steel-concrete composite section, significantly reducing the intervals during process transitions and improving construction efficiency. Moreover, the hoisting of the formwork system and the steel structure is completed by independent equipment, mitigating the problem of frequent assembly and disassembly of the suspended lifting system and improving construction safety. Additionally, with the addition of hoisting equipment and the requirement for tight connection of construction steps, there is a problem of overlapping and mutual interference of hoisting equipment movement paths. Therefore, by sliding the two equipment separately on the upper and lower sides of the main truss and by using the hoisting avoidance method of the suspended lifting system, interference and collisions between the equipment and the steel structure and the mid-span steel beams are avoided, which helps improve construction efficiency and safety.

[0014] Preferably, the integrated equipment further includes a slide rail, the base is slidably connected to the slide rail, the slide rail extends along the construction direction of the concrete segment beam, and during the concrete segment beam pouring construction, the slide rail extends to the top of the concrete segment beam to be poured, and the formwork system is slidably connected to the extension section of the slide rail.

[0015] By adopting the above technical solution, the formwork system and the main truss share a set of slide rails, which not only reduces material input, but also helps to maintain the consistency of movement between the main truss and the formwork system, reduces the positioning of the formwork system, and helps to improve construction quality and efficiency.

[0016] Preferably, a telescopic drive component is provided at the bottom of the truss, which drives the template system to move along the extension direction of the slide rail.

[0017] By adopting the above technical solution, the template system can be moved under the pushing and traction action of the telescopic drive component, reducing the traditional manual work of moving the sliding beam forward and improving the level of equipment automation.

[0018] Preferably, during the segmental beam casting construction, an embedded part is first fixedly installed at the bottom of the extension section of the slide, and the embedded part is embedded and fixed in the segmental beam concrete.

[0019] By adopting the above technical solution, combined with the special characteristics of segmental beam casting construction and the timing of formwork system placement, the slide rail is extended first and then fixed. At the same time, the slide rail adopts the fixing method of pre-embedded parts instead of the traditional anchoring method, which helps to reduce damage to the newly cast concrete segmental beam.

[0020] Preferably, when the template system is in place, the embedded part is located inside the casting cavity of the template system.

[0021] By adopting the above technical solution, after the segmental beam is poured, the embedded parts are embedded in the segmental beam concrete, and the slide rail fixing and segmental beam pouring steps are completed at the same time, which helps to improve construction efficiency.

[0022] Preferably, the upper end face of the sliding beam is provided with two upper guide rails arranged longitudinally and horizontally, and the two upper guide rails are respectively placed on both sides of the sliding beam. The lifting device of the hoisting device moves up and down in the gap between the two upper guide rails.

[0023] By adopting the above technical solution, the lifting device's lifting tool can move vertically, which helps to reduce the probability of collision between the lifting system and the suspension hoisting device.

[0024] Preferably, the upper end face of the template system is fixed with a sliding member, and the lower end face of the sliding member is provided with a sliding groove that matches the upper web of the slide.

[0025] By adopting the above technical solution, the sliding component is connected to the upper web plate of the slide rail, which helps to reduce the movement interference between the sliding component and the embedded part.

[0026] Preferably, the upper surface of the template system is provided with a clearance groove for accommodating the embedded parts.

[0027] By adopting the above technical solutions, it is beneficial to reduce the possibility of movement interference between the embedded parts and the template system and the embedded parts. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the steel-concrete hybrid beam continuous steel structure bridge of this application.

[0029] Figure 2 This is a schematic diagram of the integrated equipment according to an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the structure of the template system in the embodiment of this application.

[0031] Figure 4This is a schematic diagram of the state of the first segment beam before casting in the embodiments of this application.

[0032] Figure 5 This is a schematic diagram showing the completed casting state of the last segment beam in the embodiments of this application.

[0033] Figure 6 This is a schematic diagram of the construction status of the mid-span steel beam in the embodiments of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Pier body; 2. Foundation section; 3. Concrete beam; 31. Segmental beam; 4. Steel-concrete composite section; 5. Mid-span steel beam; 6. Integrated equipment; 61. Base; 611. Telescopic drive component; 62. Cantilever beam; 63. Sliding beam frame; 631. Upper guide rail; 632. Lower guide rail; 7. Suspension lifting device; 8. Formwork system; 81. End formwork; 82. Inner top formwork; 83. Outer formwork; 84. Inner side formwork; 85. Outer bottom formwork; 86. Support frame; 87. Inner bottom formwork; 88. Cylinder; 9. Slide rail; 91. Sliding component; 92. Embedded component; 10. Lifting device; 101. Steel structure. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0036] This invention discloses an integrated equipment 6 for the cantilever erection of a steel-concrete hybrid continuous rigid frame bridge. (Refer to...) Figure 1 The steel-concrete hybrid continuous rigid frame bridge consists of piers 1, concrete beams 3, and a mid-span steel beam 5. The steel beam is located in the mid-span between adjacent piers 1. This application utilizes integrated equipment 6 for continuous construction, which includes:

[0037] Slide 9, see reference Figure 2 The slide 9 is made of I-beams. The first section of slide 9 is anchored to the foundation section 2 at the top of the pier body 1. The slide 9 extends longitudinally to both sides of the foundation section 2.

[0038] The base 61 is slidably connected to the slide rail 9 at its lower end so as to move longitudinally along the bridge construction direction.

[0039] The cantilever frame 62 has its inclined lower end mounted on the upper surface of the base 61, and its inclined upper end extends out of the periphery of the base 61.

[0040] A sliding beam frame 63 is horizontally welded and fixed to the inclined upper end of the cantilever frame 62. The sliding beam frame 63, the main body of the cantilever frame 62, and the base 61 are arranged in a parallelogram. Two upper guide rails 631 are longitudinally and horizontally fixed to the upper end face of the sliding beam frame 63, and the two upper guide rails 631 are respectively placed on both sides of the sliding beam frame 63. Two lower guide rails 632 are longitudinally and horizontally fixed to the lower end face of the sliding beam frame 63, and two upper guide rails 631 are respectively placed on both sides of the sliding beam frame 63.

[0041] Template System 8, see reference Figure 3 The formwork system 8 includes an outer mold 83, an inner bottom mold 87, an inner side mold 84, an inner top mold 82, an outer bottom mold 85, an end mold 81, and a support frame 86. It is a segmental concrete molding structure. The end mold 81 is fixedly connected to the support frame 86 and, together with the inner mold, outer mold, and the mating surface of the already poured segmental beam 31, forms a pouring cavity. To facilitate demolding, the inner side mold 84, inner top mold 82, and inner bottom mold 87 are all connected to the middle part of the support frame 86 via cylinders 8. The outer mold 83 is connected to the inner wall of the support frame 86 via cylinders 8, and the outer bottom mold 85 is connected to the inner bottom wall of the support frame 86 via cylinders 8. The extension and retraction of the cylinders 8 achieves the inward convergence of the inner mold and the outward expansion of the outer mold, thus facilitating demolding.

[0042] Lifting device 10 and suspension hoisting device 7, refer to Figure 2 The hoisting device 10 is used to lift the steel structure 101 at the steel-concrete composite section 4 and the mid-span steel beam 5 at the mid-span position. The suspended lifting device 7 is used to lift the formwork system 8. Both the hoisting device 10 and the suspended lifting device 7 use connecting jacks to achieve height adjustment. The hoisting device 10 is slidably connected to the upper guide rail 631 of the sliding beam frame 63, and the suspended lifting device 7 is slidably connected to the lower guide rail 632.

[0043] The hoisting device 10 can lift and lower itself within the gap between the two upper guide rails 631. Simultaneously, the hoisting device 10 can be stored on the upper side of the sliding beam frame 63 to avoid the lateral movement path of the suspended lifting device 7 during the cyclic construction of the concrete segmental beam 31. During the placement of the steel structure 101 in the steel-concrete composite section 4, the suspended lifting device 7 and the formwork system 8 are moved to avoid the vertical hoisting path of the steel structure 101. During the construction of the mid-span steel beam 5, the formwork system 8 is lifted to the height of the main truss via the suspended lifting system to avoid the installation position of the mid-span steel beam 5, thus solving the problem of interference between the moving equipment and improving construction efficiency.

[0044] During the pouring of the concrete segmental beam 31, the slide rail 9 extends above the concrete segmental beam 31 to be poured, and the formwork system 8 is slidably connected to the extension of the slide rail 9. A sliding member 91 is fixed to the upper end face of the outer frame of the formwork system 8, and a groove matching the upper web of the slide rail 9 is opened on the lower end face of the sliding member 91. The formwork system 8 achieves the purpose of moving the formwork and the base 61 along the same track through the sliding connection between the sliding member 91 and the slide rail 9.

[0045] A telescopic drive component 611 is horizontally fixed to the upper surface of the base 61. Specifically, the telescopic drive component 611 is a longitudinal jack. The end of the telescopic drive component 611 is fixedly connected to the sliding component 91. Through the pushing and pulling of the telescopic drive component 611, the lateral movement of the template system 8 is achieved, which is conducive to improving the automation level of the equipment.

[0046] In addition, during the pouring of segmental beam 31, an embedded part 92 is first fixedly installed at the bottom of the extension section of the slide rail 9. The embedded part 92 is pre-embedded and fixed in the concrete of segmental beam 31. In order to reduce the collision between the formwork system 8 and the pre-fixed embedded part 92 during the movement of the formwork system 8, an avoidance groove is opened on the top surface of the formwork system 8 frame to accommodate the embedded part 92. After the segmental beam 31 is poured, the embedded part 92 is embedded in the concrete of segmental beam 31, and the fixing of slide rail 9 and the pouring of segmental beam 31 are completed at the same time, which helps to improve construction efficiency.

[0047] Reference Figures 4 to 6 The implementation steps of an integrated equipment for the cantilever erection of a continuous rigid frame bridge made of steel-concrete composite beams according to an embodiment of the present invention are as follows:

[0048] S1: First construct the bridge substructure, piers, and the prestressed concrete T-beam foundation section at the top of the piers.

[0049] S2: Integrated Equipment and Slide Assembly: The first slide 9 is erected on the top surface of the T-beam foundation section 2 and anchored to the foundation section 2. The slide 9 is set along the extension direction of the bridge. Two sets of integrated equipment are assembled on the upper surface of each T-beam foundation section 2. The two sets of integrated equipment are connected to the slide 9. The cantilever ends of the two sets of integrated equipment extend to both sides of the T-beam foundation section 2. The formwork system 8 of the integrated equipment is suspended on the side of the T-beam foundation section 2 by the suspension lifting device 7.

[0050] S3: Segmental Beam Casting Construction: Extend the slide rail 9 to the top of the concrete segmental beam 31 to be cast. Adjust the elevation and alignment of the formwork system 8 using the suspended lifting device 7, and complete the connection between the slide rail and the slide member. Then install the telescopic drive 611 and fix the telescopic drive 611 and the slide member 91. Driven by the telescopic drive 611, position and fix the formwork system 8 on the side of the T-beam foundation segment 2. Tie the reinforcing bars of the segmental beam 31 and pour concrete. Embedded parts are embedded in the segmental beam concrete. After curing to the design strength and design elastic modulus of the concrete, the cylinders inside the formwork system 8 retract in stages, completing the demolding operations of the inner bottom formwork 87, inner side formwork 84, and inner top formwork 82 in sequence. Simultaneously complete the demolding construction of the outer side formwork 83 and outer bottom formwork 85. Then, insert the prestressed steel bars and tension the prestress according to the monitoring instructions.

[0051] S4: Reference Figure 3The integrated equipment is repositioned: the slide rail 9 is extended to the top surface of the segment beam 31 to be poured, then the main truss 6 and the formwork system are released from their fixed state, the longitudinal jacks are started, and the main truss 6 of the integrated equipment is slowly pushed forward, so that the main truss 6 and the formwork system 8 are both slid forward by one segment length and put into place. The main truss 6 is anchored and the formwork system is fixed, and the steel reinforcement binding work of the segment beam 31 is completed. Then the concrete of the segment beam 31 is poured.

[0052] S5: Reference Figure 3 The subsequent segment beam 31 is constructed in cycles of S3 and S4 until the segment before the rigid-concrete composite section. Steel structure connectors are pre-embedded at the ends of segment beam 31. The T-beams on the top surface of each pier 1 are constructed simultaneously, and the T-beams of adjacent pier 1 are constructed in opposite directions.

[0053] After completing the S5 concrete section 3 cycle construction, the slide 9 is extended to above the position of the steel-concrete composite section 4. The main truss 6 and the formwork system 8 continue to move forward by one segment beam distance, and the main truss 6 is fixed. Then, under the pushing action of the telescopic drive 611, the formwork system 8 continues to move forward, thereby reserving the installation position of the steel structure 101 between the formwork system 8 and the segment beam. Then, the main truss is fixed, and then the steel structure placement construction is carried out.

[0054] S6: Steel structure in place for section 4 of the steel-concrete composite segment: (Refer to...) Figure 4 The steel structure of the steel-concrete composite section 4 is transported to the bridge by water and anchored. The hoisting device 10 lowers the anti-lifting device and then connects the lifting device to the steel structure 101. The hoisting system 10 starts the continuous jacks to lift the steel structure 101 of the steel-concrete composite section 4 to the design elevation. Then, the three-dimensional coordinates of the steel-concrete composite section 4 are accurately measured. The hoisting device uses longitudinal and transverse adjustment jacks and connecting jacks to accurately adjust the three-dimensional coordinates and alignment of the steel structure. Finally, the connecting parts of the steel structure and the concrete section 3 are connected and locked.

[0055] S7: Construction of steel-concrete composite section 4: Disconnect the steel structure 101 from the lifting device 10, then lift the lifting device 10 and store it in the sliding beam frame 63. Then, retract the telescopic drive component 611 and move the cantilever lifting device 10 at the same time to drive the moving formwork system 8 to move back. The formwork system 8 is in place at the position of steel-concrete composite section 4. The steel structure 101 enters the pouring cavity in the formwork system 8, the steel reinforcement of steel-concrete composite section 4 is tied and concrete is poured. After covering and curing the concrete to the design requirements, the prestressed steel reinforcement is tensioned.

[0056] After the pouring and demolding of the steel-concrete composite section 4 in S7 are completed, the hoisting device 10 is moved to the middle span position. Then, the formwork system 8 is moved away from the steel-concrete composite section 5. Next, the formwork system 10 is lifted to the height of the main truss 6 and the formwork system 8 is moved longitudinally to make the vertical lowering path of the formwork system 8 different from that of the hoisting device 10. Then, preparations are made for the construction of the middle span steel beam 5.

[0057] S8: Construction of the mid-span steel beam 5: Then start the longitudinal jacks to move the integrated equipment to the lifting position of the mid-span steel beam 5 and anchor it.

[0058] The mid-span steel beam 5 is fabricated as a whole, with a 0.5m closure opening reserved on one side. The mid-span steel beam 5 is transported to the bridge site by waterway and anchored. The mid-span steel beam 5 is lifted to the design elevation by two sets of integrated hoisting equipment 10. The three-dimensional coordinates of the steel beam are precisely adjusted by horizontal and vertical jacks. One side of the steel beam is first welded to the steel-concrete composite section 4, and the other side is matched and installed according to the actual measurement data of the closure opening to achieve full-span closure.

[0059] Finally, the bridge deck system and ancillary structures were constructed.

[0060] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An integrated equipment for the cantilever erection of a continuous rigid frame bridge made of steel-concrete composite beams, characterized in that: include: The base (61) moves along the bridge construction direction; A cantilever frame (62) is provided, with its lower inclined end mounted on the upper surface of the base (61) and its upper inclined end extending out of the periphery of the base (61). A sliding beam frame (63) is horizontally arranged at the inclined upper end of the cantilever frame (62); The hoisting device (10) and the suspension lifting device (7) are slidably connected to the upper and lower end faces of the sliding beam frame (63), respectively. A template system (8) is connected to a suspension lifting device (7), and the template system (8) is height-adjusted by the suspension lifting device (7); During the cyclic construction of the concrete segmental beam (31), the lifting device (10) is stored on the upper side of the sliding beam frame (63) to avoid the lateral movement path of the suspension lifting device (7); during the placement construction of the steel structure (101) of the steel-concrete composite section (4), the suspension lifting device (7) and the formwork system (8) are moved to avoid the vertical lifting path of the steel structure (101); during the construction of the mid-span steel beam (5), the formwork system (8) is lifted to the sliding beam frame (63) by the suspension lifting device (7) to avoid the installation position of the mid-span steel beam (5).

2. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 1, characterized in that: The integrated equipment also includes a slide rail, the base is slidably connected to the slide rail, the slide rail extends along the construction direction of the concrete segment beam, during the concrete segment beam pouring construction, the slide rail extends to the top of the concrete segment beam to be poured, and the formwork system is slidably connected to the extension section of the slide rail.

3. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 2, characterized in that: A telescopic drive component is horizontally fixed on the upper surface of the base, and the telescopic drive component drives the template system to move along the extension direction of the slide.

4. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 2, characterized in that: During the segmental beam casting construction, an embedded part is first fixedly installed at the bottom of the extension section of the slide, and the embedded part is embedded and fixed in the concrete of the segmental beam.

5. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 4, characterized in that: When the template system is in place, the embedded part is located inside the casting cavity of the template system.

6. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 1, characterized in that: The upper end face of the sliding beam is provided with two upper guide rails arranged longitudinally and horizontally. The two upper guide rails are placed on both sides of the sliding beam, and the lifting device of the hoisting device moves up and down in the gap between the two upper guide rails.

7. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 5, characterized in that: The upper end face of the template system is fixed with a sliding member, and the lower end face of the sliding member is provided with a sliding groove that matches the upper web of the slide.

8. The integrated equipment for cantilever erection of a continuous rigid frame bridge with steel-concrete composite beams according to claim 7, characterized in that: The upper surface of the template system is provided with a clearance groove for accommodating embedded parts.

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