Construction formwork device for precast box girder wet joint and use method thereof

Abstract

A construction formwork device for precast box girder wet joint and a using method, comprising a bracket (1) placed on the lower end face of the precast box girder, a wet joint formwork (3) placed in the joint body between the precast box girders, a support frame group arranged between the wet joint formwork (3) and the bracket (1), through the wet joint formwork (3), the wet joint formwork is realized as a construction formwork in the joint body between the precast box girders, through the bracket (1), the support frame group is realized as frame support, through the support frame group, the wet joint formwork (3) is realized as inserted and assembled and fixed, the wet joint formwork (3) is realized as top-in type fixing in the joint body between the precast box girders, the technical problem that the wet joint formwork is placed on the lower end face of the joint body between the precast box girders, the support rod is placed on the upper end face of the joint body between the precast box girders, the support rod and the wet joint formwork are connected together through the screw rod, and the leakage window body of the installed screw rod exists is solved, and therefore the overall consistency performance and overall strength of the precast box girder wet joint construction body are improved.

Description

Technical Field

[0001] This invention relates to a construction formwork device and its method of use, and more particularly to a construction formwork device and its method of use for wet joints of precast box girders. Background Technology

[0002] After precast box girders are hoisted onto the piers, joints exist between them, requiring wet joint construction. Therefore, the construction formwork for these wet joints is a crucial building component. Existing formwork for precast box girder wet joints typically involves placing the wet joint template on the lower surface of the joint and then placing support rods on the upper surface. The support rods are then connected to the wet joint template using bolts. After the wet joint construction is complete, the bolts are removed from the support rods and the wet joint template, and both are removed from the precast box girder. The exposed openings where the bolts were installed are then filled. However, these exposed openings affect the overall consistency and strength of the precast box girder wet joint construction.

[0003] Because wet joint templates, support rods, and bolts need to be installed in the joints between each precast box girder, the construction efficiency of the wet joints of the precast box girders is affected.

[0004] This invention, through its top-insertion fixing technique within the joint between precast box girders, effectively explores and studies the technical problem of existing methods that involve placing a wet joint template on the lower end face of the joint between precast box girders, placing a support rod on the upper end face of the joint, and connecting the support rod to the wet joint template with a screw, thus creating a leaky window for installing the screw.

[0005] The statements herein provide only background information related to this invention and do not necessarily constitute prior art. Based on the technical disclosure provided by the applicant on May 10, 2023, which addresses practical technical problems encountered during the work process, and through searching similar patent documents and existing technical problems, technical features, and technical effects in the background art, the technical solution of this invention is proposed. Summary of the Invention

[0006] The subject of this invention is a construction formwork device for wet joints of precast box girders.

[0007] The subject of this invention is a method of using a construction formwork device for wet joints of precast box girders.

[0008] In order to overcome the above-mentioned technical shortcomings, the purpose of this invention is to provide a construction formwork device and a method of use for wet joints of precast box girders, thereby improving the overall consistency and overall strength of the construction body of wet joints of precast box girders.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is: a construction formwork device for wet joints of precast box girders, comprising a bracket placed on the lower end face of the precast box girder, a wet joint template placed in the joint between the precast box girders, and a support frame assembly disposed between the wet joint template and the bracket.

[0010] By designing brackets, wet joint templates, and support frame assemblies, the wet joint templates serve as construction templates within the joints between precast box girders. The brackets provide frame support for the support frame assemblies, which in turn allow for the insertion and assembly of the wet joint templates. This top-insertion method for fixing the wet joint templates within the joints between precast box girders solves the technical problem of exposed bolt holes in traditional methods where the wet joint templates are placed on the lower surface of the joint, the support rods are placed on the upper surface, and the support rods are connected to the wet joint templates with bolts. Therefore, this method improves the overall consistency and strength of the precast box girder wet joint construction.

[0011] This invention designs a method for connecting the bracket, wet joint template, and support frame assembly by means of top-insertion fixing in the joint between precast box girders.

[0012] This invention designs a method for connecting the support frame assembly with the bracket and the wet joint template by means of plug-in assembly and fixing.

[0013] The present invention designs a support frame assembly that includes an intermediate support frame and end support frames.

[0014] The technical advantages of the above four solutions are as follows: they enable the propagation of the support body on the outer end face of the wet joint template, eliminating the need to use installation bolts to hoist and fix the wet joint template through the joint between the precast box girders, thus ensuring the overall performance of the wet joint template.

[0015] The present invention is designed to include a first accessory device, which is disposed on a bracket, a wet joint template and a support frame assembly. The first accessory device is configured to include a trolley frame, a vertical thrust cylinder, a tilting thrust cylinder and a horizontal thrust cylinder.

[0016] The technical effect of the above technical solution is that it realizes the integrated installation of other components and expands the technical effect of the present invention.

[0017] The present invention is designed with an intermediate support frame, an end support frame and a trolley frame respectively provided on the bracket. The intermediate support frame and the end support frame are respectively provided with a wet joint template and a transverse thrust cylinder. A vertical thrust cylinder and a tilting thrust cylinder are respectively provided between the trolley frame and the bracket.

[0018] The technical effect of the above technical solution is that the bracket, intermediate support frame, wet joint template, end support frame, trolley frame, vertical thrust cylinder, tilting thrust cylinder and horizontal thrust cylinder constitute the basic technical solution of the present invention, and solve the technical problem of the present invention.

[0019] This invention designs a bracket comprising a vertical frame and a beam section. The lower end face of the vertical frame is connected to the inner side of the upper end face of the beam section. The middle vertical section of the vertical frame is connected to the trolley frame, and the upper horizontal section of the vertical frame is connected to the tilting thrust cylinder. The inner side of the upper end face of the beam section is connected to the vertical thrust cylinder. A portion of the upper end face of the beam section is connected to an intermediate support frame via bolts and nuts, while another portion of the upper end face of the beam section is connected to an end support frame via bolts and nuts. The vertical frame is an open-shaped frame with a ladder-shaped vertical section and a ladder-shaped upper horizontal section. The beam sections are ladder-shaped and are spaced apart along the transverse centerline of the vertical frame.

[0020] The technical effect of the above solution is that it realizes the vertical part as the contact part of the flipping frame support, which facilitates the docking and installation of wet joint templates between precast box girders.

[0021] The present invention designs a wet joint template as a strip plate-shaped body, with the middle part of the wet joint template being connected to an intermediate support frame, one end of the wet joint template being connected through to an end support frame, and the other end of the wet joint template being connected to an end support frame in a tightening manner.

[0022] The technical effect of the above solution is that it enables the setting of recessed templates in the joints between precast box girders.

[0023] The present invention designs an intermediate support frame as a rectangular frame with a central X-shaped rod, wherein the lower frame of the intermediate support frame is connected to the bracket by bolts and nuts, the upper frame of the intermediate support frame is connected to the wet joint template in contact, and a portion of the side of the intermediate support frame is connected to the transverse thrust cylinder.

[0024] The technical effect of the above solution is that it enables top support and fixation of the wet joint template.

[0025] This invention designs an end support frame comprising a fixed frame, a movable frame, and a cylindrical plate. The outer end of the horizontal bar of the fixed frame is connected through-hole to the lower end of the vertical bar of the movable frame. The upper end of the vertical bar of the movable frame is connected to the inner end face of the cylindrical plate. The inner end of the horizontal bar of the fixed frame is connected to a bracket via bolts and nuts. The outer end face of the cylindrical plate is fitted with a wet joint template. The upper end of the vertical bar of the fixed frame is connected to the wet joint template. The outer end face of the vertical bar of the movable frame is connected to a transverse thrust cylinder. The fixed frame is an L-shaped fence frame. The movable frame is a fence frame with a through hole at the lower end of the vertical bar, and the through hole of the movable frame is connected to the outer end of the horizontal bar of the fixed frame. The cylindrical plate is a pile with a rectangular blind hole at the outer end face, and the rectangular blind hole of the cylindrical plate is connected to the wet joint template.

[0026] The technical effect of the above solution is that it achieves fixed support for the ends of the wet joint template.

[0027] The present invention is designed such that the vertical thrust cylinder, the tilting thrust cylinder, and the horizontal thrust cylinder are configured as electric thrust cylinders. One end of the vertical thrust cylinder and one end of the tilting thrust cylinder are respectively configured to be connected to the bracket, and the other end of the vertical thrust cylinder and the other end of the tilting thrust cylinder are respectively configured to be connected to the trolley frame. One end of the horizontal thrust cylinder is configured to be connected to the intermediate support frame, and the other end of the horizontal thrust cylinder is configured to be connected to the end support frame.

[0028] The technical effect of the above solution is that it realizes the displacement-driven setting.

[0029] This invention designs a trolley frame comprising a plate section, a roller section, an extension rod section, a counterweight section, and a tower section. The lower end of the plate section is connected to the roller section, the upper end of the plate section is connected to the tower section, one side of the plate section is connected to the inner end of the extension rod section, the other side of the plate section is connected to the inner end of the counterweight section, the outer end of the extension rod section is connected to a bracket, the outer inner end of the extension rod section is connected to a vertical thrust cylinder, and the upper horizontal section of the tower section is connected to a tilting thrust cylinder. The plate section is a rectangular sheet, the roller section is a wheel with lugs, the lugs of the roller section are connected to the plate section, and the roller section is arranged in two rows along the lower end of the plate section. The extension rod section is a rod-shaped body, and the extension rods are arranged at intervals along the transverse centerline of the plate section. The counterweight section is a rectangular seat, and the tower section is a strip tower with a triangular cross-section.

[0030] The technical effect of the above solution is that it enables the external vehicle body to be fixed, thus ensuring the stability of the bracket in the construction state.

[0031] The present invention designs a wet joint template, bracket and intermediate support frame that are distributed in a way that supports the lower part, and the wet joint template, bracket and intermediate support frame, end support frame, trolley frame, vertical thrust cylinder, tilting thrust cylinder and horizontal thrust cylinder are distributed in a way that generates displacement.

[0032] The present invention designs a set of wet joint template components consisting of an intermediate support frame, a wet joint template, and an end support frame located along the transverse centerline of the bracket. Multiple sets of wet joint template components are arranged at intervals along the longitudinal centerline of the beam section. The extension rod section is connected to the vertical frame section, and the fixing frame section is connected to the beam section.

[0033] This invention designs a method for using a construction formwork device for wet joints of precast box girders. The steps are as follows: the wet joint template serves as a construction template in the joint between the precast box girders; the bracket provides frame support for the support frame assembly; the support frame assembly allows for the insertion and assembly of the wet joint template, thus achieving top-insertion fixation of the wet joint template in the joint between the precast box girders.

[0034] The technical effects of the above solutions are: highlighting the technical feature of top-insertion fixing in the joint between precast box girders, and introducing its application in the technical field of construction formwork devices for wet joints of precast box girders.

[0035] The present invention comprises the following steps: Based on the joint length between precast box girders during construction, select brackets with adjacent strip beams spaced 80-120mm apart; select at least three wet joint templates; connect the templates along the transverse centerline of the brackets to the fixed frame portions of two end support frames via bolts and nuts on the strip beam portions located on the outer side; insert one end of the wet joint template into the rectangular blind hole in the cylindrical plate portion of the end support frame on the strip beam portion located on the outer side; connect the template to the fixed frame portion of the end support frame via bolts and nuts on the strip beam portion corresponding to the other end of the wet joint template; connect the other end of the wet joint template to the upper end of the vertical rod of the fixed frame portion; and connect the template between the middle portion of the wet joint template and the corresponding strip beam portion. Place intermediate support frames and connect them to the strip beam section using bolts and nuts. Install transverse thrust cylinders between the movable frame section and adjacent intermediate support frames, extending the cylinders to move the movable frame section on the fixed frame section. The movable frame section then moves the cylindrical plate section. One end of the wet joint template is pressed against the upper end of the vertical rod of the fixed frame section, thus completing a set of wet joint template components corresponding to the joint between one of the precast box girders. Install multiple sets of wet joint template components along the longitudinal centerline of the strip beam section, corresponding to the number of joints between the precast box girders. Connect the crane hook to the vertical frame section, place the guide rope into the joint between the precast box girders located in the middle section, and connect one end of the guide rope to the strip beam section. The outer end is connected, and the bracket is placed on the lower end face of the precast box girder by a crane. The guide rope is pulled to make the vertical frame part contact the precast box girder located on the outer side, so that the strip beam part is in a horizontal state. Multiple sets of wet joint template components are placed into the joint between the corresponding precast box girders. The other end of one of the guide ropes is connected to the vertical frame part, so that the wet joint template is installed in the joint between the precast box girders. The crane hook is separated from the vertical frame part, so that the roller part is moved and the plate part is placed on the precast box girder located on the outer side. The outer end of the extension rod part is connected to the vertical part of the vertical frame part. The vertical thrust cylinder is installed between the extension rod part and the strip beam part. The tilting thrust cylinder is installed between the upper horizontal part of the tower part and the upper horizontal part of the vertical frame part. Wet joint construction is carried out in the joint body. After the wet joint construction in the joint body between the precast box girders is completed, one end of the guide rope is separated from the vertical frame. The vertical thrust cylinder and the tilting thrust cylinder are in the extended state, and the horizontal thrust cylinder is in the retracted state. Through the horizontal thrust cylinder, the moving frame part moves in the opposite direction on the fixed frame part. The moving frame part drives the cylindrical plate part to move in the opposite direction, and the cylindrical plate part separates from the wet joint template. Through the vertical thrust cylinder, the vertical frame part and the strip beam part are pushed downward. Through the tilting thrust cylinder, the vertical frame part and the strip beam part are pushed outward, so that the vertical frame part and the strip beam part are in the displaced state with the precast box girder. The outer end of the probe rod part is separated from the vertical part of the vertical frame part, and the vertical thrust cylinder is disassembled from the probe rod part and the strip beam part.Disconnect the tilting thrust cylinder from the upper horizontal section of the tower section and the upper horizontal section of the vertical frame section. Connect the crane hook to the vertical frame section, loosen the guide rope to bring the beam section into a vertical position, and then use the crane to place the bracket into the next wet joint construction work position.

[0036] The technical effect of the above technical solution is that it enables the setting of operation methods for wet joint construction.

[0037] The technical advantages of this invention are as follows: the device can be assembled according to the number of box girder segments, and the assembled formwork is an integral template, with a template installation speed far exceeding that of traditional template installation; when using this device for diaphragm reinforcement template construction, workers do not need to use hanging baskets and can work inside the diaphragm template, greatly improving the safety factor; the device can realize the integral construction of diaphragms and wet joints, which greatly improves the construction speed compared to multi-stage construction and solves the problem of difficult construction organization due to the small volume of diaphragms; this construction method eliminates the construction joint between the diaphragm and the wet joint, ensuring construction quality.

[0038] In this technical solution, the bracket and wet joint template are basic components and essential technical features of the invention. The intermediate support frame, end support frame, trolley frame, vertical thrust cylinder, tilting thrust cylinder, and horizontal thrust cylinder are functional components and features that achieve other technical effects of the invention. The design of these technical features, such as the vertical frame section, beam section, fixed frame section, movable frame section, cylindrical plate section, plate section, roller section, extension rod section, counterweight section, and tower section, conforms to the Patent Law and its implementing regulations.

[0039] In this technical solution, the key technical features are the bracket, wet joint template and support frame assembly for top-insertion fixing in the joint between precast box girders. In the technical field of construction formwork device and usage method for wet joint of precast box girders, it has novelty, inventiveness and practicality. The terminology in this technical solution can be explained and understood by patent literature in this technical field. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the present invention.

[0042] Figure 2 This is a structural schematic diagram of the trolley frame 5.

[0043] Figure 3 This is a schematic diagram showing the overall connection relationship between bracket 1, intermediate support frame 2, wet joint template 3, end support frame 4, and transverse thrust cylinder 8.

[0044] Figure 4 This is a schematic diagram showing the connection relationship between bracket 1, trolley frame 5, and vertical thrust cylinder 6.

[0045] Figure 5 This is a schematic diagram showing the partial connection relationship between bracket 1, intermediate support frame 2, wet joint template 3, end support frame 4, and transverse thrust cylinder 8.

[0046] Bracket-1, Intermediate support frame-2, Wet joint template-3, End support frame-4, Trolley frame-5, Vertical thrust cylinder-6, Tilting thrust cylinder-7, Horizontal thrust cylinder-8, Vertical frame section-11, Strip beam section-12, Fixed frame section-41, Moving frame section-42, Tube plate section-43, Plate section-51, Roller section-52, Extending rod section-53, Counterweight block section-54, Tower section-55. Detailed Implementation

[0047] According to the examination guidelines, terms such as “having,” “comprising,” and “including” used in this invention should be understood to mean without dispensing the presence or addition of one or more other elements or combinations thereof.

[0048] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not explicitly stated, please refer to the product manual or follow the conventional methods in the art.

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] A construction formwork device for wet joints of precast box girders. Figure 1 This is the first embodiment of the present invention. The embodiment is described in detail with reference to the accompanying drawings. It includes a bracket 1, an intermediate support frame 2, a wet joint template 3, an end support frame 4, a trolley frame 5, a vertical thrust cylinder 6, a tilting thrust cylinder 7, and a horizontal thrust cylinder 8. The intermediate support frame 2, the end support frame 4, and the trolley frame 5 are respectively arranged on the bracket 1. The wet joint template 3 and the horizontal thrust cylinder 8 are respectively arranged on the intermediate support frame 2 and the end support frame 4. The vertical thrust cylinder 6 and the tilting thrust cylinder 7 are respectively arranged between the trolley frame 5 and the bracket 1.

[0053] In this embodiment, the bracket 1 is configured to include a vertical frame portion 11 and a beam portion 12. The lower end face of the vertical frame portion 11 is connected to the inner side of the upper end face of the beam portion 12. The middle vertical portion of the vertical frame portion 11 is connected to the trolley frame 5, and the upper horizontal portion of the vertical frame portion 11 is connected to the tilting thrust cylinder 7. The inner side of the upper end face of the beam portion 12 is connected to the vertical thrust cylinder 6. A portion of the upper end face of the beam portion 12 is connected to the intermediate support frame 2 by bolts and nuts, while another portion of the upper end face of the beam portion 12 is connected to the end support frame 4 by bolts and nuts. The vertical frame portion 11 is configured as an open-shaped frame with a ladder-shaped vertical portion and a ladder-shaped upper horizontal portion. The beam portion 12 is configured as a ladder-shaped frame, and the beam portions 12 are arranged at intervals along the transverse center line of the vertical frame portion 11.

[0054] The bracket 1 forms a support connection point for the intermediate support frame 2, the end support frame 4, the trolley frame 5, the vertical thrust cylinder 6, and the tilting thrust cylinder 7. The beam part 12 connects to the intermediate support frame 2, the end support frame 4, and the vertical thrust cylinder 6. The vertical frame part 11 connects to the trolley frame 5 and the tilting thrust cylinder 7. Its technical purpose is to serve as a support carrier for the intermediate support frame 2 and the end support frame 4.

[0055] In this embodiment, the intermediate support frame 2 is configured as a rectangular frame with a central X-shaped rod, and the lower frame of the intermediate support frame 2 is configured to be connected to the bracket 1 by bolts and nuts. The upper frame of the intermediate support frame 2 is configured to be connected in contact with the wet joint template 3. A portion of the side of the intermediate support frame 2 is configured to be connected to the transverse thrust cylinder 8.

[0056] The intermediate support frame 2 forms a support connection point for the bracket 1, the wet joint template 3, and the transverse thrust cylinder 8. The intermediate support frame 2 realizes the connection with the bracket 1, the wet joint template 3, and the transverse thrust cylinder 8. Its technical purpose is to serve as one of the components for connecting the wet joint template 3 and the bracket 1.

[0057] In this embodiment, the end support frame 4 is configured to include a fixed frame portion 41, a movable frame portion 42, and a cylindrical plate portion 43. The outer end of the horizontal bar portion of the fixed frame portion 41 is configured to be connected through to the lower end of the vertical bar portion of the movable frame portion 42. The upper end of the vertical bar portion of the movable frame portion 42 is configured to be connected to the inner end portion of the cylindrical plate portion 43. The inner end of the horizontal bar portion of the fixed frame portion 41 is configured to be connected to the bracket 1 via bolts and nuts. The outer end portion of the cylindrical plate portion 43 is configured to be fitted with the wet joint template 3. The upper end of the vertical rod of 41 is configured to be connected to the wet joint template 3. The outer end of the vertical rod of the movable frame part 42 is configured to be connected to the transverse thrust cylinder 8. The fixed frame part 41 is configured as an L-shaped fence frame. The movable frame part 42 is configured as a fence frame with a through hole at the lower end of the vertical rod. The through hole of the movable frame part 42 is configured to be connected to the outer end of the horizontal rod of the fixed frame part 41. The cylindrical plate part 43 is configured as a pile body with a rectangular blind hole at the outer end. The rectangular blind hole of the cylindrical plate part 43 is configured to be connected to the wet joint template 3.

[0058] The end support frame 4 forms a support connection point for the bracket 1, the wet joint template 3 and the transverse thrust cylinder 8. The fixed frame part 41 realizes the connection with the bracket 1, the fixed frame part 41 and the cylindrical plate part 43 realize the connection with the wet joint template 3, and the movable frame part 42 realizes the connection with the transverse thrust cylinder 8. Its technical purpose is to serve as the second component for connecting the wet joint template 3 and the bracket 1.

[0059] In this embodiment, the wet joint template 3 is configured as a strip-shaped plate and the middle part of the wet joint template 3 is configured to be connected to the middle support frame 2. One end of the wet joint template 3 is configured to be connected through to the end support frame 4 and the other end of the wet joint template 3 is configured to be connected to the end support frame 4 in a tightening manner.

[0060] The wet joint template 3 forms a support connection point for the intermediate support frame 2 and the end support frame 4. The wet joint template 3 realizes the connection with the intermediate support frame 2 and the end support frame 4. Its technical purpose is to serve as a component installed on the lower end surface of the joint between precast box girders.

[0061] In this embodiment, the vertical thrust cylinder 6, the tilting thrust cylinder 7, and the horizontal thrust cylinder 8 are configured as electric thrust cylinders. One end of the vertical thrust cylinder 6 and one end of the tilting thrust cylinder 7 are respectively connected to the bracket 1, and the other end of the vertical thrust cylinder 6 and the other end of the tilting thrust cylinder 7 are respectively connected to the trolley frame 5. One end of the horizontal thrust cylinder 8 is connected to the intermediate support frame 2, and the other end of the horizontal thrust cylinder 8 is connected to the end support frame 4.

[0062] The vertical thrust cylinder 6, the tilting thrust cylinder 7, and the horizontal thrust cylinder 8 form a support connection point for the bracket 1, the intermediate support frame 2, the end support frame 4, and the trolley frame 5. The vertical thrust cylinder 6 and the tilting thrust cylinder 7 realize the connection with the bracket 1 and the trolley frame 5, while the horizontal thrust cylinder 8 realizes the connection with the intermediate support frame 2 and the end support frame 4. Its technical purpose is to serve as a component for demolding the wet joint template 3.

[0063] In this embodiment, the trolley frame 5 is configured to include a plate portion 51, a roller portion 52, an extension rod portion 53, a counterweight portion 54, and a tower portion 55. The lower end portion of the plate portion 51 is connected to the roller portion 52, the upper end portion of the plate portion 51 is connected to the tower portion 55, one side portion of the plate portion 51 is connected to the inner end of the extension rod portion 53, the other side portion of the plate portion 51 is connected to the inner end portion of the counterweight portion 54, and the outer end of the extension rod portion 53 is connected to the bracket 1. The inner end of the extension rod portion 53 is externally... The upper horizontal part of the tower section 55 is connected to the vertical thrust cylinder 6 and is connected to the tilting thrust cylinder 7. The plate section 51 is a rectangular plate and the roller section 52 is a wheel with a lug. The lug of the roller section 52 is connected to the plate section 51 and the roller section 52 is arranged in two rows along the lower end face of the plate section 51. The probe section 53 is a rod and is arranged at intervals along the transverse center line of the plate section 51. The counterweight section 54 is a rectangular seat and the tower section 55 is a strip tower with a triangular cross section.

[0064] The trolley frame 5 forms a support connection point for the bracket 1, the vertical thrust cylinder 6, and the tilting thrust cylinder 7. The extension rod part 53 is connected to the bracket 1 and the vertical thrust cylinder 6. The tower part 55 is connected to the tilting thrust cylinder 7. The plate part 51, the roller part 52, and the counterweight part 54 provide motion support for the extension rod part 53 and the tower part 55. Its technical purpose is to serve as a support carrier for the vertical thrust cylinder 6 and the tilting thrust cylinder 7.

[0065] In this embodiment, the wet joint template 3, bracket 1, and intermediate support frame 2 are arranged in a manner that supports the lower part, and the wet joint template 3, bracket 1, and intermediate support frame 2, along with the end support frame 4, trolley frame 5, vertical thrust cylinder 6, tilting thrust cylinder 7, and horizontal thrust cylinder 8, are arranged in a manner that generates displacement. The intermediate support frame 2, wet joint template 3, and end support frame 4, which are located along the horizontal centerline of bracket 1, are arranged to form a set of wet joint template components. Multiple sets of wet joint template components are arranged at intervals along the longitudinal centerline of the beam section 12. The extension rod section 53 is connected to the vertical frame section 11, and the fixed frame section 41 is connected to the beam section 12.

[0066] The present invention will be further described below with reference to embodiments. These embodiments are intended to illustrate the present invention and not to further limit the present invention.

[0067] A method for using a construction formwork device for wet joints of precast box girders includes the following steps: Based on the joint length between the precast box girders being constructed, select brackets 1 with adjacent strip beam sections 12 spaced 80-120mm apart; select at least three wet joint templates 3; connect them to the fixing bracket sections 41 of two end support frames 4 along the transverse centerline of the brackets 1 on the outer side of the strip beam section 12 using bolts and nuts; insert one end of the wet joint template 3 into the rectangular blind hole of the cylindrical plate section 43 of the end support frame 4 on the outer side of the strip beam section 12; and connect the other end of the wet joint template 3 to the fixing bracket section 41 of the end support frame 4 using bolts and nuts on the strip beam section 12 corresponding to the other end of the wet joint template 3, so that the other end of the wet joint template 3 is connected to... The upper end of the vertical rod of the fixed frame 41 is connected to an intermediate support frame 2 placed between the middle part of the wet joint template 3 and the corresponding strip beam part 12. The intermediate support frame 2 is connected to the strip beam part 12 by bolts and nuts. A transverse thrust cylinder 8 is installed between the movable frame 42 and the adjacent intermediate support frame 2, so that the transverse thrust cylinder 8 is in an extended state, driving the movable frame 42 to move on the fixed frame 41. The movable frame 42 drives the cylindrical plate part 43 to move. The other end of the wet joint template 3 is in a tight state with the upper end of the vertical rod of the fixed frame 41, thereby completing a set of wet joint template components corresponding to the joint between one of the precast box girders. Multiple sets of wet joint template components corresponding to the number of joints between the precast box girders are installed along the longitudinal center line of the strip beam part 12.

[0068] Connect the crane hook to the vertical frame 11, place the guide rope into the joint between the precast box girders located in the middle, connect one end of the guide rope to the outer end of the strip beam 12, place the bracket 1 on the lower end face of the precast box girder using the crane, pull the guide rope to make the vertical frame 11 contact the precast box girder located on the outer side, so that the strip beam 12 is in a horizontal state, place multiple sets of wet joint template components into the joints between the corresponding precast box girders, connect the other end of the guide rope to the vertical frame 11, thereby installing the wet joint template 3 in the joint between the precast box girders, and then separate the crane hook from the vertical frame 11.

[0069] The roller section 52 is moved to place the plate section 51 on the precast box girder located on the outer side. The outer end of the extension rod section 53 is connected to the vertical part of the vertical frame section 11. The vertical thrust cylinder 6 is installed between the extension rod section 53 and the strip beam section 12. The tilting thrust cylinder 7 is installed between the upper horizontal part of the tower section 55 and the upper horizontal part of the vertical frame section 11. Wet joint construction is carried out in the joint between the precast box girders. After the wet joint construction is completed in the joint between the precast box girders, the other end of the guide rope is separated from the vertical frame section 11. The vertical thrust cylinder 6 and the tilting thrust cylinder 7 are in the extended state, and the horizontal thrust cylinder 8 is in the retracted state. Through the horizontal thrust cylinder 8, the moving frame section 42 is driven to move in the opposite direction on the fixed frame section 41. 2. Move the cylindrical plate section 43 in the opposite direction, separating the cylindrical plate section 43 from the wet joint template 3. Through the vertical thrust cylinder 6, push the vertical frame section 11 and the strip beam section 12 downward. Through the flip thrust cylinder 7, push the vertical frame section 11 and the strip beam section 12 outward, so that the vertical frame section 11 and the strip beam section 12 are in a displaced state with the precast box girder. Separate the outer end of the extension rod section 53 from the vertical part of the vertical frame section 11. Disassemble the vertical thrust cylinder 6 from between the extension rod section 53 and the strip beam section 12. Disassemble the flip thrust cylinder 7 from between the upper horizontal part of the tower section 55 and the upper horizontal part of the vertical frame section 11. Connect the crane hook to the vertical frame section 11. Loosen the guide rope so that the strip beam section 12 is in a vertical state. Then, through the crane, place the bracket 1 on the next wet joint construction work position.

[0070] In verifying this invention, the inventors abandoned the existing technical features of placing the wet joint template on the lower end face of the joint between precast box girders, then placing the support rod on the upper end face of the joint between the precast box girders, and connecting the support rod to the wet joint template with a screw, thus creating a transparent window for installing the screw. Instead, they first proposed a top-insertion fixing technique within the joint between the precast box girders, achieving the first unexpected technical effect: enabling the installation of the wet joint template 3 on the bracket 1, eliminating the need for installation on the precast box girder itself, thus improving construction efficiency and operational safety. This resulted in the second... An unexpected technical effect: It enabled the simultaneous installation of wet joint template 3 between multiple precast box girders, ensuring the installation accuracy of the wet joint template 3 between the precast box girders and improving the construction effect. A third unexpected technical effect: It enabled the modular setting of the construction formwork device for wet joints, optimizing the matching of construction devices. A fourth unexpected technical effect: It enabled the early calibration of the installation position of the wet joint template 3, ensuring the consistency of the construction of wet joints. A fifth unexpected technical effect: It enabled the frame support of the wet joint template 3, facilitating hoisting.

[0071] In the second embodiment of the present invention, the bracket 1, the wet joint template 3 and the support frame assembly are interconnected by means of top-insertion fixing in the joint between the precast box girders.

[0072] In this embodiment, the support frame assembly is connected to the bracket 1 and the wet joint template 3 by means of plug-in assembly and fixing.

[0073] In this embodiment, the support frame assembly is configured to include an intermediate support frame 2 and an end support frame 4.

[0074] In this embodiment, a first accessory device is also included and is disposed on the bracket 1, the wet joint template 3 and the support frame assembly. The first accessory device is configured to include a trolley frame 5, a vertical thrust cylinder 6, a tilting thrust cylinder 7 and a horizontal thrust cylinder 8.

[0075] The second embodiment of the present invention is based on the first embodiment.

[0076] In the second embodiment of the present invention, the steps are as follows: the wet joint template 3 serves as a construction template in the joint between the precast box girders; the bracket 1 provides frame support for the support frame group; and the support frame group performs insertion and assembly to fix the wet joint template 3, thereby achieving top-insertion fixation of the wet joint template 3 in the joint between the precast box girders.

[0077] The second embodiment of the present invention is based on the first embodiment.

[0078] This invention has the following characteristics:

[0079] 1. Due to the design of bracket 1, wet joint template 3, and support frame assembly, the wet joint template 3 serves as a construction template in the joint between precast box girders. The bracket 1 provides frame support for the support frame assembly, and the support frame assembly allows for the insertion and assembly of the wet joint template 3. This achieves top-insertion fixation of the wet joint template 3 in the joint between precast box girders, solving the technical problem of leaky installation windows in traditional methods where the wet joint template is placed on the lower end of the joint between precast box girders, the support rod is placed on the upper end of the joint, and the support rod is connected to the wet joint template with screws. Therefore, the overall consistency and strength of the precast box girder wet joint construction are improved.

[0080] 2. Due to the design of the intermediate support frame 2 and the end support frame 4, the end insertion connection of the wet joint template 3 is realized.

[0081] 3. Due to the design of the trolley frame 5, vertical thrust cylinder 6, tilting thrust cylinder 7, and horizontal thrust cylinder 8, the wet joint template 3 can be moved and demolded.

[0082] 4. Because the design limits the numerical range of the structural shape, the numerical range is a technical feature in the technical solution of this invention, and is not a technical feature obtained by formula calculation or a limited number of experiments. The experiment shows that the technical feature of the numerical range has achieved very good technical effect.

[0083] 5. Due to the design of the technical features of this invention, and the combined effect of the individual and collective technical features, experiments have shown that the performance indicators of this invention are at least 1.7 times that of existing performance indicators, and the invention has been evaluated to have good market value.

[0084] Other technical features that connect the bracket 1, wet joint template 3, and support frame assembly for top-entry fixing in the joint between precast box girders are also embodiments of the present invention. Furthermore, the technical features of the above embodiments can be combined in any way. In order to meet the requirements of the Patent Law, the Patent Implementation Regulations, and the Examination Guidelines, all possible combinations of the technical features in the above embodiments will not be described.

[0085] The above embodiments are merely one implementation of the construction formwork device and method for wet joints of precast box girders provided by the present invention. Other modifications to the solution provided by the present invention, additions or reductions of components or steps, or application of the present invention to other technical fields similar to the present invention, all fall within the protection scope of the present invention.

Claims

1. A construction formwork device for wet joints of precast box girders, characterized in that: It includes a bracket (1) placed on the lower end face of the precast box girder, a wet joint template (3) placed in the joint between the precast box girders, and a support frame assembly set between the wet joint template (3) and the bracket (1). The support frame assembly is configured to include an intermediate support frame (2) and end support frames (4). It also includes a first accessory device and the first accessory device is disposed on the bracket (1), the wet joint template (3) and the support frame assembly. The first accessory device is configured to include a trolley frame (5), a vertical thrust cylinder (6), a tilting thrust cylinder (7) and a lateral thrust cylinder (8). A middle support frame (2), an end support frame (4), and a trolley frame (5) are respectively installed on the bracket (1). A wet joint template (3) and a transverse thrust cylinder (8) are respectively installed on the middle support frame (2) and the end support frame (4). A vertical thrust cylinder (6) and a tilting thrust cylinder (7) are respectively installed between the trolley frame (5) and the bracket (1). The bracket (1) is configured to include a vertical frame (11) and a beam (12), with the lower end face of the vertical frame (11) connected to the inner side of the upper end face of the beam (12), the middle vertical part of the vertical frame (11) connected to the trolley frame (5), and the upper horizontal part of the vertical frame (11) connected to the tilting thrust cylinder (7). The inner side of the upper end face of the beam (12) is connected to the vertical thrust cylinder (6), and a portion of the beam... The upper end face of (12) is configured to be connected to the intermediate support frame (2) by bolts and nuts. The upper end face of another part of the strip beam part (12) is configured to be connected to the end support frame (4) by bolts and nuts. The vertical frame part (11) is configured as an open-shaped frame with a vertical part of a ladder-shaped frame and an upper horizontal part of a ladder-shaped frame. The strip beam part (12) is configured as a ladder-shaped frame and the strip beam part (12) is configured to be spaced apart along the transverse center line of the vertical frame part (11). The wet joint template (3) is configured as a strip plate and the middle part of the wet joint template (3) is configured to be connected to the middle support frame (2). One end of the wet joint template (3) is configured to be connected to the end support frame (4) through the middle and the other end of the wet joint template (3) is configured to be connected to the end support frame (4) in a tightening manner. The vertical thrust cylinder (6), the tilting thrust cylinder (7), and the horizontal thrust cylinder (8) are configured as electric thrust cylinders. One end of the vertical thrust cylinder (6) and one end of the tilting thrust cylinder (7) are respectively connected to the bracket (1), and the other end of the vertical thrust cylinder (6) and the other end of the tilting thrust cylinder (7) are respectively connected to the trolley frame (5). One end of the horizontal thrust cylinder (8) is connected to the intermediate support frame (2), and the other end of the horizontal thrust cylinder (8) is connected to the end support frame (4).

2. The construction formwork device for wet joints of precast box girders according to claim 1, characterized in that: The intermediate support frame (2) is configured as a rectangular frame with a central X-shaped rod, and the lower frame of the intermediate support frame (2) is configured to be connected to the bracket (1) by bolts and nuts. The upper frame of the intermediate support frame (2) is configured to be connected to the wet joint template (3) in contact. A portion of the side of the intermediate support frame (2) is configured to be connected to the transverse thrust cylinder (8).

3. The construction formwork device for wet joints of precast box girders according to claim 1, characterized in that: The end support frame (4) is configured to include a fixed frame part (41), a movable frame part (42), and a cylindrical plate part (43). The outer end of the horizontal bar of the fixed frame part (41) is configured to be connected through to the lower end of the vertical bar of the movable frame part (42). The upper end of the vertical bar of the movable frame part (42) is configured to be connected to the inner end face of the cylindrical plate part (43). The inner end of the horizontal bar of the fixed frame part (41) is configured to be connected to the bracket (1) by bolts and nuts. The outer end face of the cylindrical plate part (43) is configured to be connected to the wet joint template (3) in a fitted manner. The upper end of the vertical rod of the movable frame (42) is configured to be connected to the wet joint template (3), the outer end of the vertical rod of the movable frame (42) is configured to be connected to the transverse thrust cylinder (8), and the fixed frame (41) is configured to be an L-shaped fence frame. The movable frame (42) is configured to be a fence frame with a through hole at the lower end of the vertical rod, and the through hole of the movable frame (42) is configured to be connected to the outer end of the horizontal rod of the fixed frame (41). The cylindrical plate (43) is configured to be a pile with a rectangular blind hole at the outer end, and the rectangular blind hole of the cylindrical plate (43) is configured to be connected to the wet joint template (3).

4. The construction formwork device for wet joints of precast box girders according to claim 1, characterized in that: The trolley frame (5) is configured to include a plate section (51), a roller section (52), an extension rod section (53), a counterweight section (54), and a tower section (55). The lower end face of the plate section (51) is configured to be connected to the roller section (52), the upper end face of the plate section (51) is configured to be connected to the tower section (55), one side face of the plate section (51) is configured to be connected to the inner end of the extension rod section (53), the other side face of the plate section (51) is configured to be connected to the inner end face of the counterweight section (54), and the outer end of the extension rod section (53) is configured to be connected to the bracket (1). The inner end of the extension rod section (53) is externally configured with... In order to connect with the vertical thrust cylinder (6) and the upper horizontal part of the tower part (55) is connected with the tilting thrust cylinder (7), the plate part (51) is a rectangular plate and the roller part (52) is a wheel with a lug. The lug of the roller part (52) is connected with the plate part (51) and the roller part (52) is arranged in two rows along the lower end face of the plate part (51). The probe part (53) is a rod and the probe part (53) is arranged at intervals along the transverse center line of the plate part (51). The counterweight part (54) is a rectangular seat and the tower part (55) is a strip tower with a triangular cross section.

5. The construction formwork device for wet joints of precast box girders according to claim 4, characterized in that: The intermediate support frame (2), wet joint template (3) and end support frame (4) located along the transverse center line of the bracket (1) are configured to form a set of wet joint template components. Multiple sets of wet joint template components are arranged at intervals along the longitudinal center line of the strip beam (12). The extension rod (53) is connected to the vertical frame (11), and the fixed frame (41) is connected to the strip beam (12).

6. The construction formwork device for wet joints of precast box girders according to any one of claims 1 to 5, characterized in that: wet The joint template (3), bracket (1), and intermediate support frame (2) are arranged in a manner that supports the lower part, and the wet joint template (3), bracket (1), and intermediate support frame (2), end support frame (4), trolley frame (5), vertical thrust cylinder (6), tilting thrust cylinder (7), and horizontal thrust cylinder (8) are arranged in a manner that generates displacement.

7. A method of using a construction formwork device for wet joints of precast box girders according to claim 4, comprising the following steps: selecting a bracket (1) with an interval of 80-120mm between adjacent strip beams (12) according to the joint length between the precast box girders under construction; selecting at least three wet joint templates (3); connecting the strip beams (12) on the outer side with bolts and nuts to the fixing frame (41) of two end support frames (4); inserting one end of the wet joint template (3) into the rectangular blind hole of the cylindrical plate (43) of the end support frame (4) on the outer side of the strip beam (12); and inserting the strip beam corresponding to the other end of the wet joint template (3) into the rectangular blind hole of the end support frame (4) on the outer side of the strip beam (12). (12) is connected to the fixed frame part (41) of the end support frame (4) by bolts and nuts, so that the other end of the wet joint template (3) is connected to the upper end of the vertical rod of the fixed frame part (41). An intermediate support frame (2) is placed between the middle part of the wet joint template (3) and the corresponding strip beam part (12). The intermediate support frame (2) is connected to the strip beam part (12) by bolts and nuts. A transverse thrust cylinder (8) is installed between the movable frame part (42) and the adjacent intermediate support frame (2), so that the transverse thrust cylinder (8) is in the extended state, driving the movable frame part (42) to move on the fixed frame part (41). The movable frame part (42) drives the cylindrical plate part (43) to move. The other end of the wet joint template (3) is connected to the fixed frame part. (41) The upper end of the vertical rod is in a tightened state, thereby completing a set of wet joint template components corresponding to the joint between one of the precast box girders. Multiple sets of wet joint template components corresponding to the number of joints between the precast box girders are installed along the longitudinal center line of the strip beam (12). The crane hook is connected to the vertical frame (11). The guide rope is placed into the joint between the precast box girders located in the middle. One end of the guide rope is connected to the outer end of the strip beam (12). The bracket (1) is placed on the lower end face of the precast box girder by the crane. The guide rope is pulled so that the vertical frame (11) contacts the precast box girder located on the outer side, so that the strip beam (12) is in a horizontal state. Multiple sets of wet joint template components are placed on the corresponding precast box girders. In the joint between the precast box girders, one end of the guide rope is connected to the vertical frame (11), thereby installing the wet joint template (3) in the joint between the precast box girders. The crane hook is separated from the vertical frame (11), and the roller (52) is moved. The plate (51) is placed on the precast box girder located on the outer side. The outer end of the probe rod (53) is connected to the vertical part of the vertical frame (11). The vertical thrust cylinder (6) is installed between the probe rod (53) and the strip beam (12). The tilting thrust cylinder (7) is installed between the upper horizontal part of the tower part (55) and the upper horizontal part of the vertical frame (11). Wet joint construction is carried out in the joint between the precast box girders. After the wet joint construction in the joint between the precast box girders is completed,Separate one end of the guide rope from the vertical frame (11), extend the vertical thrust cylinder (6) and the tilting thrust cylinder (7), and retract the horizontal thrust cylinder (8). The horizontal thrust cylinder (8) drives the moving frame (42) to move in the opposite direction on the fixed frame (41). The moving frame (42) drives the cylindrical plate (43) to move in the opposite direction, separating the cylindrical plate (43) from the wet joint template (3). The vertical thrust cylinder (6) pushes the vertical frame (11) and the beam section (12) downwards. The tilting thrust cylinder (7) pushes the vertical frame (11) and the beam section... (12) Shift outwards to position the vertical frame (11) and the strip beam (12) in a displaced state relative to the precast box girder. Separate the outer end of the extension rod (53) from the vertical part of the vertical frame (11). Disassemble the vertical thrust cylinder (6) from between the extension rod (53) and the strip beam (12). Disassemble the tilting thrust cylinder (7) from between the upper horizontal part of the tower (55) and the upper horizontal part of the vertical frame (11). Connect the crane hook to the vertical frame (11). Loosen the guide rope to position the strip beam (12) in a vertical state. Then, using the crane, place the bracket (1) onto the next wet joint construction work position.

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