A steel-concrete variable cross-section continuous box girder bridge suspended casting basket

Abstract

The present invention discloses a hanging basket for steel-concrete variable cross-section continuous box girder bridge, and relates to the field of bridge construction equipment. In the present invention, a casting base plate is installed inside the hanging basket through a lifting and adjusting mechanism. When the casting construction of the variable cross-section continuous box girder bridge is carried out, the casting base plate can be driven to be lifted and adjusted through the lifting and adjusting components according to the change of the bridge cross-section during the construction process, without the need to manually adjust the height of the casting base plate before each casting construction, so that the height adjustment process of the casting base plate is more convenient, the hanging basket's hanging construction efficiency is improved, and the possible safety accidents caused by manual adjustment are avoided, thereby improving the safety of bridge construction; at the same time, the two hydraulic lifting components can be used to drive the casting base plate to rotate to adjust the inclination angle of the casting base plate, so that the hanging basket can perform hanging casting construction for variable cross-section bridges with different slopes, thereby improving the applicability of the hanging basket.

Description

Technical Field

[0001] The invention belongs to the field of bridge construction equipment, and in particular relates to a suspended casting hanging basket for a steel-concrete variable-section continuous box girder bridge. Background Art

[0002] With the development of large-span bridges, the development trend of bridge structure design is to rationally utilize the organizational properties of various materials, improve the comprehensive ability to resist natural disasters, and ensure the lowest cost during the service life. The hybrid beam structure is a specific embodiment of material optimization. The steel-concrete hybrid variable-section continuous box girder bridge can effectively solve the problems of new bridges crossing the river with one span, limited side spans, and limited clearance in the span range of 180-350 meters. The cantilevered steel box girder is used in the mid-span joint section of the variable-section continuous box girder bridge, which can effectively reduce the beam height in the mid-span, shorten the length of the side span and approach bridge, reduce the cantilever casting construction links, engineering volume and high-altitude operation risks, effectively shorten the construction period, and significantly reduce the project cost. During the construction of the steel-concrete hybrid variable-section continuous box girder bridge, it is necessary to use a hanging basket to construct the variable-section concrete bridge section.

[0003] Chinese patent application CN112523110B discloses a hanging basket suspension system for hanging pouring construction that is easy to move. By adopting the technology of matching the main truss, the deviation correction device, the fixing device, the walking beam, the embedded groove, the support rod, the roller, the driving member, the driving beam, the walking cylinder, the walking push plate, the reaction beam, the extension rod, the plug block, the slot, the connecting block and the connecting groove, it is easy to quickly move the suspension system to improve the construction efficiency. However, the hanging basket adopts a fixed structure, which is generally used for the construction of bridges with constant cross-sectional height. When constructing a variable cross-sectional bridge with gradually changing cross-sectional height, before each construction, it is necessary to manually adjust the height of the hanging basket casting bottom plate to change the volume of the hanging basket casting cavity so that the cast bridge is a variable cross-sectional shape. Manually adjusting the casting bottom plate is not only time-consuming and labor-intensive, but also reduces the efficiency of bridge construction. At the same time, since the hanging basket is suspended on the construction bridge, when the staff adjusts the hanging basket casting bottom plate, there will be certain safety hazards, and some existing casting bottom plates do not have a buffer and shock-absorbing structure, are easily damaged, and have a low service life. Summary of the invention

[0004] In response to the problems in the related technology, the present invention proposes a suspended casting basket for a steel-concrete variable-section continuous box girder bridge to overcome the technical problem in the existing related technology that manual adjustment of the height and inclination of the casting bottom plate of the hanging basket is required when constructing a variable-section bridge. The manual adjustment is not only time-consuming and labor-intensive, but also reduces the efficiency of bridge construction and has certain safety hazards.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention discloses a steel-concrete variable-section continuous box girder bridge suspended casting hanging basket, comprising a suspension mechanism, a suspended casting basket, a casting bottom plate, a lifting and lowering adjustment mechanism and an auxiliary support mechanism. The suspended casting basket is suspended and installed at the construction end of the concrete beam section of the continuous variable-section box girder bridge through the suspension mechanism, and the casting bottom plate is slidably installed inside the suspended casting basket.

[0007] The lifting and adjusting mechanism comprises a hydraulic lifting assembly, a lifting plate, a hinge and a sliding adjustment assembly. Two hydraulic lifting assemblies are provided. The two hydraulic lifting assemblies are respectively fixedly installed on the inner and outer sides of the bottom of the suspended casting basket. The lifting plates are fixedly installed on the tops of the two hydraulic lifting assemblies. The tops of the lifting plates are hingedly connected to the sliding adjustment assembly through the hinge. The sliding adjustment assembly is installed on the bottom surface of the casting bottom plate. When the two hydraulic lifting assemblies lift and adjust the inclination angle of the casting bottom plate, the casting bottom plate slides along the sliding adjustment assembly under the top pushing action of the inner wall of the suspended casting basket.

[0008] The auxiliary support mechanism includes an elastic support component, a pressing and translating component, a side support plate and a pressing block, wherein the side support plate is installed on the top surface of the lifting plate through the pressing and translating component, the elastic support component is fixedly installed between the lifting plate and the casting bottom plate for elastically supporting the casting bottom plate, and the pressing block is fixedly installed on the bottom surface of the casting bottom plate and is located above the pressing and translating component;

[0009] When pouring concrete in the hanging pouring basket, the pouring bottom plate moves downward under the action of concrete gravity, and drives the pressing block downward to press the pressing translation assembly, so that the pressing translation assembly drives the side support plate to translate and fit closely to the inner wall of the hanging pouring basket.

[0010] Furthermore, the suspension mechanism includes a track frame, a sliding bracket, a suspension rope and a suspension frame, the sliding bracket is slidably installed on the track frame, the suspension frame is fixedly installed on the outside of the suspended pouring basket, and the sliding bracket is connected to the suspension frame through the suspension rope.

[0011] Furthermore, the hydraulic lifting assembly includes two hydraulic jacks, the two hydraulic jacks are respectively fixedly installed at the two ends of the bottom of the hanging pouring basket, and lifting plates are fixedly installed on the telescopic ends of the tops of the two hanging pouring baskets;

[0012] A reinforced plate is fixedly installed on the bottom surface of the casting bottom plate.

[0013] Furthermore, the sliding adjustment component includes a sliding groove and a slider, the sliding groove is opened on the bottom surface of the stiffened plate, an optical axis guide rail is fixedly installed inside the sliding groove, the slider is slidably installed in the sliding groove and is slidably plugged into the optical axis guide rail, and the optical axis guide rail is equipped with a pressure spring that abuts against both ends of the slider.

[0014] Furthermore, the hinge comprises a lower connecting plate and an upper connecting plate, the lower connecting plate is mounted on the top surface of the lifting plate, the upper connecting plate is fixedly mounted on the bottom surface of the slider, and the lower connecting plate and the upper connecting plate are rotationally connected via a connecting shaft.

[0015] Furthermore, the elastic support assembly includes a telescopic shaft and a support spring, the telescopic shaft is fixedly mounted on the lifting plate, the lower connecting plate is fixedly mounted on the telescopic end at the top of the telescopic shaft, the support spring is mounted on the outer ring of the telescopic shaft, and the bottom end of the support spring abuts against the top surface of the lifting plate, and the top end of the support spring abuts against the bottom surface of the stiffened plate.

[0016] Further, the pressing translation assembly includes a support seat, the support seat is fixedly mounted on the top surface of the lifting plate, a lifting wedge block and a translation wedge block are slidably mounted inside the support seat through a slideway, and the lifting wedge block and the translation wedge block abut against each other through an inclined surface;

[0017] A lifting block extending to the support seat is fixedly installed on the top of the lifting wedge block, and a push-pull rod extending to the outer side of the support seat is fixedly installed on one side of the translation wedge block, and one end of the push-pull rod is fixedly connected to one side of the side support plate;

[0018] A return spring is sleeved on the push-pull rod, one end of the return spring abuts against one side of the translation wedge block, and the other end of the return spring abuts against the inner wall of the support seat.

[0019] Furthermore, a side support frame is arranged between the two hydraulic jacks in the same group of the hydraulic lifting assembly, and connecting seats are fixedly installed at both ends of the side support frame, and the two ends of the side support frame are respectively fixedly connected to the lifting plates on the top of the two hydraulic jacks through the connecting seats.

[0020] Furthermore, the outer side surface of the side support plate is provided with anti-slip grooves.

[0021] The present invention has the following beneficial effects:

[0022] 1. In the present invention, the casting bottom plate is installed inside the hanging casting basket through a lifting and adjusting mechanism. When the casting construction of a variable-section continuous box girder bridge is carried out, the casting bottom plate can be driven to be lifted and adjusted through the lifting and adjusting assembly according to the change of the bridge cross-section during the construction process, so that the casting bottom plate cooperates with the hanging casting basket to cast the variable-section bridge, and there is no need to manually adjust the height of the casting bottom plate before each casting construction, which makes the height adjustment process of the casting bottom plate more convenient, improves the hanging casting construction efficiency of the hanging basket, and avoids the safety accidents that may occur due to manual adjustment, thereby improving the safety of bridge construction.

[0023] 2. The lifting and adjusting mechanism in the present invention includes two hydraulic lifting assemblies, and the two hydraulic lifting assemblies are respectively installed on the inner and outer sides of the bottom of the casting base plate. The two hydraulic lifting assemblies can drive the casting base plate to rotate to adjust the inclination angle of the casting base plate through the cooperation of the two hydraulic lifting assemblies, so that the hanging basket can perform suspended casting construction for variable-section bridges with different slopes, thereby improving the applicability of the hanging basket; and the top of the hydraulic lifting assembly is connected to the casting base plate through a hinge and a sliding adjustment assembly. The sliding adjustment assembly can cause relative sliding between the casting base plate and the hydraulic lifting assembly when the casting base plate rotates, thereby preventing the casting base plate from being locked and unable to be adjusted, thereby ensuring that the casting base plate can be rotated and adjusted normally through the cooperation of the hinge and the sliding adjustment assembly.

[0024] 3. In the present invention, when concrete is poured in the suspended pouring basket, the pouring base plate moves downward under the action of the concrete gravity, and drives the pressure block downward to press the pressing and translational assembly, so that the pressing and translational assembly drives the side support plate to translate and fit tightly against the inner wall of the suspended pouring basket. At this time, friction resistance is generated between the side support plate and the inner wall of the suspended pouring basket, and the friction resistance can be used to provide auxiliary support for the pouring base plate and the concrete poured thereon, thereby reducing the support pressure of the hydraulic support assembly, preventing the hydraulic support assembly from being damaged due to excessive load-bearing, and increasing the service life of the hydraulic support assembly.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the suspended pouring hanging basket during construction of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the suspended pouring basket of the present invention;

[0029] Figure 3 It is one of the three-dimensional cross-sectional structural schematic diagrams of the suspended pouring basket of the present invention;

[0030] Figure 4 For the present invention Figure 3 A local enlarged structural schematic diagram;

[0031] Figure 5 The second is a schematic diagram of a three-dimensional cross-section structure of the hanging pouring basket of the present invention;

[0032] Figure 6 For the present invention Figure 5 A schematic diagram of the local enlarged structure at B;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the bottom surface of the casting bottom plate of the present invention;

[0034] Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at C;

[0035] Fig. 9 It is a schematic diagram of the three-dimensional structure of the suspension mechanism of the present invention during suspension assembly construction.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 100. Concrete beam section of continuous variable cross-section box girder bridge; 200. Steel box girder section of continuous variable cross-section box girder bridge;

[0038] 1. Suspension mechanism; 11. Track frame; 12. Sliding bracket; 13. Suspension rope; 14. Suspension frame; 15. Guide frame; 16. Anchor connection seat; 2. Suspension pouring basket; 3. Casting base plate; 4. Lifting adjustment mechanism; 41. Hydraulic jack; 42. Lifting plate; 43. Lower connecting plate; 44. Reinforced plate; 45. Upper connecting plate; 46. Slide groove; 47. Sliding block; 48. Optical axis guide rail; 49. Pressure spring; 5. Auxiliary support mechanism; 51. Side support plate; 52. Support seat; 53. Lifting block; 54. Pressure block; 55. Telescopic shaft; 56. Side support frame; 57. Connecting seat; 58. Support spring; 59. Lifting wedge block; 510. Translation wedge block; 511. Reset spring; 512. Push-pull rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0040] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0041] Example 1

[0042] See also Figure 1-Figure 4As shown, the present invention is a steel-concrete mixed variable-section continuous box girder bridge suspended casting hanging basket, comprising a suspension mechanism 1, a suspended casting basket 2, a casting bottom plate 3, a lifting and adjusting mechanism 4 and an auxiliary supporting mechanism 5, wherein the suspended casting basket 2 is suspended and installed at the construction end of the concrete beam section 100 of the continuous variable-section box girder bridge through the suspension mechanism 1, and the casting bottom plate 3 is slidably installed inside the suspended casting basket 2; the lifting and adjusting mechanism 4 comprises a hydraulic lifting assembly, a lifting plate 42, a hinge and a sliding adjustment assembly, wherein two hydraulic lifting assemblies are provided, and the two hydraulic lifting assemblies are respectively fixedly installed on the inner and outer sides of the bottom of the suspended casting basket 2, and the tops of the two hydraulic lifting assemblies are fixedly installed with the lifting plates 42, and the tops of the lifting plates 42 are hingedly connected to the sliding adjustment assembly through the hinge, and the sliding adjustment assembly is installed on the bottom surface of the casting bottom plate 3. When the two When the hydraulic lifting assembly lifts and adjusts the inclination angle of the casting bottom plate 3, the casting bottom plate 3 slides along the sliding adjustment assembly under the top pushing action of the inner wall of the suspended casting basket 2; the auxiliary support mechanism 5 includes an elastic support assembly, a pressing and translation assembly, a side support plate 51 and a pressing block 54, the side support plate 51 is installed on the top surface of the lifting plate 42 through the pressing and translation assembly, the elastic support assembly is fixedly installed between the lifting plate 42 and the casting bottom plate 3 for elastically supporting the casting bottom plate 3, the pressing block 54 is fixedly installed on the bottom surface of the casting bottom plate 3 and is located above the pressing and translation assembly; when concrete is poured in the suspended casting basket 2, the casting bottom plate 3 moves downward under the action of the gravity of the concrete, and drives the pressing block 54 downward to press the pressing and translation assembly, so that the pressing and translation assembly drives the side support plate 51 to translate and fit closely to the inner wall of the suspended casting basket 2;

[0043] During the suspended pouring construction of the end of the concrete beam section 100 of the continuous variable cross-section box girder bridge, firstly, according to the slope of the bottom surface of the concrete beam section 100 of the continuous variable cross-section box girder bridge, the two hydraulic lifting components are used to cooperate and drive the pouring bottom plate 3 to rotate until the inclination angle of the pouring bottom plate 3 is the same as the slope of the bottom surface of the concrete beam section 100 of the continuous variable cross-section box girder bridge, and then the two hydraulic lifting components are driven to rise and fall synchronously, thereby driving the pouring bottom plate 3 to be lifted and lowered, so that one end of the pouring bottom plate 3 is flush with the bottom of the construction end of the concrete beam section 100 of the continuous variable cross-section box girder bridge and abuts against the limit, and the other three sides of the pouring bottom plate 3 are all abutted against the inner wall of the suspended pouring basket 2, thereby limiting and fixing the pouring bottom plate 3. At the same time, a casting cavity is formed between the concrete beam section 100 of the continuous variable cross-section box girder bridge, the casting bottom plate 3 and the hanging casting basket 2, and then concrete is poured into the casting cavity; at this time, the casting bottom plate 3 moves downward under the action of the concrete gravity, and drives the pressing block 54 to move downward to press the pressing translation assembly, so that the pressing translation assembly drives the side support plate 51 to translate and fit closely to the inner wall of the hanging casting basket 2, so that friction resistance is generated between the side support plate 51 and the inner wall of the hanging casting basket 2, and the casting bottom plate 3 and the concrete poured thereon are auxiliary supported by the friction resistance, thereby reducing the support pressure of the hydraulic support assembly, preventing the hydraulic support assembly from being damaged due to excessive load-bearing, and prolonging the service life of the hydraulic support assembly;

[0044] The pouring bottom plate 3 in the present invention is installed in the interior of the suspended pouring basket 2 through the lifting and adjusting mechanism 4. When the pouring construction of the variable-section continuous box girder bridge is carried out, the pouring bottom plate 3 can be driven to be lifted and adjusted according to the change of the bridge cross section through the lifting and adjusting component during the construction process, without the need to manually adjust the height of the pouring bottom plate 3 before each pouring construction, so that the height adjustment process of the pouring bottom plate 3 is more convenient, the efficiency of the suspended pouring construction of the hanging basket is improved, and the possible safety accidents caused by manual adjustment are avoided, thereby improving the safety of bridge construction; at the same time, the pouring bottom plate 3 can be driven to rotate by the cooperation of the two hydraulic lifting components to adjust the inclination angle of the pouring bottom plate 3, so that the hanging basket can perform suspended pouring construction for variable-section bridges with different slopes, thereby improving the applicability of the hanging basket; and the top of the hydraulic lifting component is connected to the pouring bottom plate 3 through a hinge and a sliding adjustment component. The sliding adjustment component can cause relative sliding between the pouring bottom plate 3 and the hydraulic lifting component when the pouring bottom plate 3 rotates, thereby preventing the pouring bottom plate 3 from being locked and unable to be adjusted, thereby ensuring that the pouring bottom plate 3 can be normally rotated and adjusted through the cooperation of the hinge and the sliding adjustment component.

[0045] See also Figure 1 As shown, in one embodiment, the suspension mechanism 1 includes a track frame 11, a sliding bracket 12, a suspension rope 13 and a suspension frame 14, wherein the sliding bracket 12 is slidably mounted on the track frame 11, and the suspension frame 14 is fixedly mounted on the outside of the suspended pouring basket 2, and the sliding bracket 12 is connected to the suspension frame 14 through the suspension rope 13;

[0046] Among them, the sliding bracket 12 is anchored and connected to the concrete beam section 100 of the continuous variable cross-section box girder bridge through anchor rods to ensure the stability and safety of the sliding bracket 12, the suspension frame 14 and the suspended casting basket 2. The track frame 11 is a spliced ​​track, and the suspension rope 13 is a steel wire rope with a winch connected to one end. When the concrete in the casting cavity is cooled and formed to form a new bridge section, a new track frame 11 is spliced ​​and installed on the bridge section, and the suspension rope 13 is unwound by the winch at the same time, so that the suspended casting basket 2 moves downward and separates from the finalized bridge section, and then the anchoring of the sliding bracket 12 is released, and the sliding bracket 12 is pushed to move toward the newly laid track frame 11, thereby driving the suspended casting basket 2 to move forward, and then the height of the casting bottom plate 3 is adjusted by the lifting and adjusting mechanism 4 according to the bottom surface height of the continuous variable cross-section box girder bridge concrete beam section 100, and finally the suspension rope 13 is rewound by the winch, so that the suspended casting basket 2 is re-docked and fitted to the construction end of the continuous variable cross-section box girder bridge concrete beam section 100 for the next round of suspended casting construction.

[0047] See also Figure 3-Figure 5 As shown, in one embodiment, the hydraulic lifting assembly includes two hydraulic jacks 41, and the two hydraulic jacks 41 are respectively fixedly installed at the two ends of the bottom of the suspended pouring basket 2, and the telescopic ends of the tops of the two suspended pouring baskets 2 are fixedly installed with lifting plates 42; the bottom surface of the casting bottom plate 3 is fixedly installed with a reinforcing plate 44;

[0048] The hydraulic jack 41 has a strong supporting capacity. By using the hydraulic jack 41 as a driving component for lifting and lowering adjustment, not only can the casting base plate 3 be lifted and lowered, but it can also provide effective support during casting to prevent the hydraulic lifting components from being crushed. By setting up two groups of four hydraulic jacks 41 for support and adjustment, not only can its supporting performance be further improved, but also the casting base plate 3 can be more evenly stressed and supported more stably through four-point support. The stiffened plate 44 can reinforce the casting base plate 3 to prevent the casting base plate 3 from being damaged by pressure.

[0049] See also Figure 2 , Figure 7 , Figure 8 As shown, in one embodiment, the sliding adjustment assembly includes a slide groove 46 and a slider 47, the slide groove 46 is opened on the bottom surface of the stiffened plate 44, an optical axis guide rail 48 is fixedly installed inside the slide groove 46, the slider 47 is slidably installed in the slide groove 46 and is slidably plugged and connected with the optical axis guide rail 48, and the optical axis guide rail 48 is sleeved with pressure springs 49 that abut against both ends of the slider 47;

[0050] The inner side edge of the casting bottom plate 3 abuts against the inner wall of the hanging casting basket 2 under the elastic force of the pressure spring 49, so that the side edge of the casting bottom plate 3 is tightly fitted with the inner wall of the hanging casting basket 2, preventing concrete from leaking downward from the gap between the casting bottom plate 3 and the hanging casting basket 2 during concrete pouring; and when the casting bottom plate 3 is rotated to adjust the inclination angle, the casting bottom plate 3 slides and moves under the abutment of the inner wall of the hanging casting basket 2 and the elastic force of the pressure spring 49, preventing the casting bottom plate 3 from being locked and unable to be adjusted.

[0051] See also Figure 6-Figure 8 As shown, in one embodiment, the hinged member includes a lower connecting plate 43 and an upper connecting plate 45, the lower connecting plate 43 is installed on the top surface of the lifting plate 42, and the upper connecting plate 45 is fixedly installed on the bottom surface of the slider 47, and the lower connecting plate 43 and the upper connecting plate 45 are rotatably connected via a connecting shaft; the lifting plate 42 and the casting bottom plate 3 are hingedly connected, so that the casting bottom plate 3 and the lifting plate 42 can rotate relative to each other, ensuring that the casting bottom plate 3 can be normally rotated and adjusted.

[0052] See also Figure 4-6 As shown, in one embodiment, the elastic support assembly includes a telescopic shaft 55 and a support spring 58, the telescopic shaft 55 is fixedly mounted on the lifting plate 42, the lower connecting plate 43 is fixedly mounted on the telescopic end at the top of the telescopic shaft 55, the support spring 58 is mounted on the outer ring of the telescopic shaft 55, and the bottom end of the support spring 58 abuts against the top surface of the lifting plate 42, and the top end of the support spring 58 abuts against the bottom surface of the stiffening plate 44;

[0053] Among them, the elastic force of the support spring 58 is greater than the gravity of the casting base plate 3. When concrete is not poured on the casting base plate 3, the support spring 58 supports and lifts the casting base plate 3 upward, and the telescopic shaft 55 is stretched and extended. When concrete is poured on the casting base plate 3, the casting base plate 3 moves downward under the action of the gravity of the concrete, and squeezes and contracts the support spring 58, while driving the pressure block 54 downward.

[0054] See also Figure 3-Figure 6As shown, in one embodiment, the pressing and translating assembly includes a support seat 52, the support seat 52 is fixedly mounted on the top surface of the lifting plate 42, and a lifting wedge block 59 and a translation wedge block 510 are slidably mounted inside the support seat 52 through a slide, and the lifting wedge block 59 and the translation wedge block 510 abut against each other through an inclined surface; a lifting block 53 extending to the support seat 52 is fixedly mounted on the top of the lifting wedge block 59, and a push-pull rod 512 extending to the outer side surface of the support seat 52 is fixedly mounted on one side of the translation wedge block 510, and one end of the push-pull rod 512 is fixedly connected to one side of the side support plate 51; a return spring 511 is sleeved on the push-pull rod 512, one end of the return spring 511 abuts against one side of the translation wedge block 510, and the other end of the return spring 511 abuts against the inner wall of the support seat 52;

[0055] When the pressing block 54 moves downward, it abuts against the top of the lifting block 53 and squeezes the lifting block 53 downward, and then the lifting block 53 drives the lifting wedge block 59 to slide downward in the support seat 52. At the same time, the lifting wedge block 59 abuts and moves the translation wedge block 510 toward the outside of the support seat 52 through the inclined surface, and then the translation wedge block 510 drives the push-pull rod 512 and the side support plate 51 to move toward the inner wall of the hanging pouring basket 2, so that the outer side surface of the side support plate 51 abuts against the inner wall of the hanging pouring basket 2, and at the same time, the reset spring 511 is squeezed and contracted to generate a reset elastic force, which is used to subsequently drive the translation wedge block 510 to reset.

[0056] See also Figure 5 , Figure 6 As shown, in one embodiment, a side support frame 56 is provided between the two hydraulic jacks 41 in the same group of the hydraulic lifting components, and connecting seats 57 are fixedly installed at both ends of the side support frame 56, and the two ends of the side support frame 56 are respectively fixedly connected to the lifting plates 42 on the tops of the two hydraulic jacks 41 through the connecting seats 57; when the outer side surface of the side support plate 51 abuts against the inner wall of the suspended pouring basket 2, the outer side of the lifting plate 42 is subjected to an inward pushing force. At this time, the side support frame 56 can push and support the inner side surface of the lifting plate 42, so that the forces on both sides of the lifting plate 42 are balanced, preventing the lifting plate 42 from being pushed and offset under the reverse action when supported by the side support plate 51, thereby ensuring the normal operation of the lifting plate 42.

[0057] See also Figure 3 , Figure 4 As shown, in one embodiment, the outer side surface of the side support plate 51 is provided with anti-slip grooves, which can increase the friction component generated when the side support plate 51 abuts against the inner wall of the suspended casting basket 2, thereby improving the auxiliary support effect of the casting base plate 3.

[0058] Directions:

[0059] First, according to the slope of the bottom surface of the continuous variable cross-section box girder bridge concrete beam section 100, two hydraulic lifting components are used to cooperate and drive the casting bottom plate 3 to rotate until the inclination angle of the casting bottom plate 3 is the same as the slope of the bottom surface of the continuous variable cross-section box girder bridge concrete beam section 100, and then the two hydraulic lifting components are driven to rise and fall synchronously, thereby driving the casting bottom plate 3 to be raised and lowered, so that one end of the casting bottom plate 3 is flush with the bottom of the construction end of the continuous variable cross-section box girder bridge concrete beam section 100 and abuts against the limit position, and the other three sides of the casting bottom plate 3 are all abutted against the inner wall of the hanging casting basket 2, so that the casting bottom plate 3 is limited and fixed, and at the same time, a casting cavity is formed by the enclosure between the continuous variable cross-section box girder bridge concrete beam section 100, the casting bottom plate 3 and the hanging casting basket 2, and then concrete is poured into the casting cavity;

[0060] The pouring bottom plate 3 moves downward under the action of concrete gravity, and squeezes and contracts the supporting spring 58, while driving the pressing block 54 downward. When the pressing block 54 moves downward, it abuts against the top of the lifting block 53 and squeezes the lifting block 53 downward, and then the lifting block 53 drives the lifting wedge block 59 to slide downward in the supporting seat 52. At the same time, the lifting wedge block 59 abuts and moves the translation wedge block 510 toward the outside of the supporting seat 52 through the inclined surface, and then the translation wedge block 510 drives the push-pull rod 512 and the side support plate 51 to move toward the inner wall of the hanging pouring basket 2, so that the outer side surface of the side support plate 51 abuts against the inner wall of the hanging pouring basket 2, so that friction resistance is generated between the side support plate 51 and the inner wall of the hanging pouring basket 2, and the pouring bottom plate 3 and the concrete poured thereon are auxiliary supported by the friction resistance, thereby reducing the supporting pressure of the hydraulic support assembly and preventing the hydraulic support assembly from being damaged due to excessive load-bearing.

[0061] Example 2

[0062] Based on Example 1, please refer to Fig. 9 As shown, in this embodiment, a guide frame 15 is installed at the front end of the sliding bracket 12, and the suspension rope 13 passes through the guide frame 15 and is suspended at the outer end of the bridge through the guide limit of the guide frame 15. At the same time, the end of the suspension rope 13 is fixedly connected with an anchor connection seat 16. When the suspension construction of the steel box girder section 200 of the continuous variable cross-section box girder bridge is carried out, the suspension rope 13 is anchored and connected to the two ends of the steel box girder section 200 of the continuous variable cross-section box girder bridge through the anchor connection seat 16, and then the anchor connection seat 16 and the steel box girder section 200 of the continuous variable cross-section box girder bridge are suspended and lifted by the suspension rope 13, so that the steel box girder section 200 of the continuous variable cross-section box girder bridge is connected to the end face of the bridge, and then the suspension installation of the steel box girder section 200 of the continuous variable cross-section box girder bridge is carried out.

[0063] In this embodiment, the suspension mechanism 1 is slightly adjusted so that after the suspension basket is used to perform suspended pouring construction on the concrete beam section 100 of the continuous variable cross-section box girder bridge, the suspension mechanism 1 can also perform suspended assembly construction on the steel box girder section 200 of the continuous variable cross-section box girder bridge. This eliminates the need to replace different suspension lifting structures during the bridge construction process, making the construction process of the continuous variable cross-section box girder bridge more convenient.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The preferred embodiments of the invention disclosed above are only used to help explain the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can understand and use the invention well.

Claims

1. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket, characterized in that: It includes a hanging mechanism, a hanging pouring basket, a pouring bottom plate, a lifting and adjusting mechanism and an auxiliary supporting mechanism. The hanging pouring basket is hung and installed at the construction end of the concrete beam section of the continuous variable cross-section box girder bridge through the hanging mechanism, and the pouring bottom plate is slidably installed inside the hanging pouring basket; The lifting and adjusting mechanism includes a hydraulic lifting assembly, a lifting plate, a hinge and a sliding adjustment assembly. Two hydraulic lifting assemblies are provided. The two hydraulic lifting assemblies are respectively fixedly installed on the inner and outer sides of the bottom of the suspended casting basket. The tops of the two hydraulic lifting assemblies are fixedly installed with lifting plates. The tops of the lifting plates are hingedly connected with sliding adjustment assemblies through hinges. The sliding adjustment assemblies are installed on the bottom surface of the casting bottom plate. When the two hydraulic lifting assemblies lift and adjust the inclination angle of the casting bottom plate, the casting bottom plate slides along the sliding adjustment assemblies under the top pushing action of the inner wall of the suspended casting basket. The auxiliary support mechanism includes an elastic support component, a pressing and translating component, a side support plate and a pressing block. The side support plate is installed on the top surface of the lifting plate through the pressing and translating component. The elastic support component is fixedly installed between the lifting plate and the casting bottom plate to elastically support the casting bottom plate. The pressing block is fixedly installed on the bottom surface of the casting bottom plate and is located above the pressing and translating component. When pouring concrete in the hanging pouring basket, the pouring bottom plate moves downward under the action of concrete gravity, and drives the pressing block downward to press the pressing translation assembly, so that the pressing translation assembly drives the side support plate to translate and cling to the inner wall of the hanging pouring basket; The hydraulic lifting assembly includes two hydraulic jacks, which are respectively fixedly installed at the two ends of the bottom of the suspended pouring basket, and lifting plates are fixedly installed on the telescopic ends of the tops of the two suspended pouring baskets; a reinforced plate is fixedly installed on the bottom surface of the pouring bottom plate; The sliding adjustment assembly includes a slide groove and a slider. The slide groove is provided on the bottom surface of the stiffened plate. An optical axis guide rail is fixedly installed inside the slide groove. The slider is slidably installed in the slide groove and is slidably plugged and connected with the optical axis guide rail. The optical axis guide rail is provided with a pressure spring abutting against both ends of the slider. The pressing translation assembly includes a support seat, which is fixedly mounted on the top surface of the lifting plate, and a lifting wedge block and a translation wedge block are slidably mounted inside the support seat through a slideway, and the lifting wedge block and the translation wedge block abut against each other through an inclined surface; A lifting block extending to the support seat is fixedly installed on the top of the lifting wedge block, and a push-pull rod extending to the outer side of the support seat is fixedly installed on one side of the translation wedge block, and one end of the push-pull rod is fixedly connected to one side of the side support plate; A return spring is sleeved on the push-pull rod, one end of the return spring abuts against one side of the translation wedge block, and the other end of the return spring abuts against the inner wall of the support seat.

2. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket according to claim 1, characterized in that: The suspension mechanism comprises a track frame, a sliding bracket, a suspension rope and a suspension frame. The sliding bracket is slidably installed on the track frame, the suspension frame is fixedly installed on the outside of the suspended pouring basket, and the sliding bracket is connected to the suspension frame through the suspension rope.

3. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket according to claim 1, characterized in that: The hinge comprises a lower connecting plate and an upper connecting plate, wherein the lower connecting plate is mounted on the top surface of the lifting plate, and the upper connecting plate is fixedly mounted on the bottom surface of the slider, and the lower connecting plate and the upper connecting plate are rotationally connected via a connecting shaft.

4. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket according to claim 3, characterized in that: The elastic support assembly includes a telescopic shaft and a support spring. The telescopic shaft is fixedly installed on the lifting plate. A lower connecting plate is fixedly installed on the telescopic end at the top of the telescopic shaft. The support spring is installed on the outer ring of the telescopic shaft, and the bottom end of the support spring abuts against the top surface of the lifting plate, and the top end of the support spring abuts against the bottom surface of the stiffened plate.

5. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket according to claim 1, characterized in that: A side support frame is arranged between the two hydraulic jacks in the same group of hydraulic lifting components, and connecting seats are fixedly installed at both ends of the side support frame, and the two ends of the side support frame are fixedly connected to the lifting plates on the top of the two hydraulic jacks through the connecting seats.

6. A steel-concrete variable cross-section continuous box girder bridge suspended casting basket according to claim 1, characterized in that: The outer side surface of the side support plate is provided with anti-slip grooves.

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