Support for flange formwork construction and construction method and application thereof

Abstract

The invention provides a support for flange formwork construction and a construction method and application thereof.The support for flange formwork construction comprises a support body forming a supporting part in at least two directions; the back ridges are located on the supporting part and used for assembling the formwork, and the back ridges form an assembling track of the integrated flange formwork; the sliding mechanism forms a suspended connecting rail, and the walking mechanism located on the support body forms power and is used for driving the support body to move to the construction position of the flange formwork along the sliding mechanism. An operation platform and a guardrail arranged along the periphery of the operation platform are arranged at the highest position of the support body. The method can be applied to concrete box girder pouring in narrow areas or positions where full framing is inconvenient to erect across rivers, and has the advantages of being convenient to operate, efficient in construction, high in construction safety and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of automated supports for formwork construction, and particularly to a support for flange formwork construction, its construction method, and application. Background Art

[0002] Due to its good mechanical properties, the concrete box girder structure is the most common basic structure in the field of bridge construction. Most concrete box girders need to be scaffolded and accepted before pouring construction, and then formwork erection, steel bar construction, and pouring are carried out.

[0003] The traditional scaffolding process generally involves assembling the scaffolding on-site using disc buckle scaffolds. At this time, the erection of the scaffold is not only restricted by the on-site space, site, and the number of construction workers, but also takes a long time, which is not conducive to shortening the construction period. At the same time, it also poses high requirements for the installation elevation of the scaffold at the flange of the box girder, the management of construction workers, and the safety of on-site construction.

[0004] Therefore, it is necessary to propose a movable integral concrete box girder flange formwork support. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a support for flange formwork construction, its construction method, and application, to form an integral and slidable support for disassembly, etc., and to apply it well.

[0006] To solve the above technical problems, the technical solutions provided by the present invention are as follows: A support for flange formwork construction, comprising, A support body that forms a support part in at least two directions; A number of backing ribs located on the support part for assembling the formwork, and the number of backing ribs forms an assembly track for an integral flange formwork; A sliding mechanism, the sliding mechanism forms a suspended connection track, and a traveling mechanism located on the support body forms power to drive the support body to move along the sliding mechanism to the construction position of the flange formwork; An operating platform is provided at the highest part of the support body, and a guardrail is provided along the outer periphery of the operating platform.

[0007] Further, the traveling mechanism is a crawler traveling mechanism, and a lifting mechanism is linked to the outside of the crawler traveling mechanism.

[0008] Further, it further includes a number of support members located on the sliding mechanism and arranged along the length direction of the connection track, and the number of support members forms a support surface during the lifting of the lifting mechanism.

[0009] Further, the sliding mechanism is a 114-type I-beam, and the 114-type I-beam forms a permanent connection member between the connecting Bailey truss and the concrete box girder.

[0010] Further, it further includes a support reinforcing member located inside the support body welded by aluminum square tubes, and the support reinforcing member is arranged in a cross shape within the framework formed by the support body.

[0011] The present invention also provides a construction method of the support for flange formwork construction on a suspended formwork support, including the following steps: Assembly and welding of the support body and welding of the back ribs along the support part of the support body; Height adjustment and preloading test of the support body, and calculating the elastic deformation value of the support through the preloading test. The preloading test is specifically carried out through a water tank; Sliding and hoisting of the support body along the sliding mechanism.

[0012] The present invention also provides an application of the support for flange formwork construction in the installation of a suspended formwork support or the installation of a formwork support in a narrow area.

[0013] Further, the installation of the suspended formwork support specifically includes cross-river formwork installation, cross-port formwork installation, cross-slope formwork installation, or formwork installation under height lifting restrictions.

[0014] Further, the application specifically includes the following steps: S1) Erection of the sliding mechanism; S2) After the support body is driven by the traveling mechanism and slides along the sliding mechanism to a position close to the construction position, it is hoisted to the construction position; S3) Formwork installation, steel bar binding, pouring, curing, and formwork removal; S4) Jacking and unloading of the support body; S5) Repeat steps S2) to S4) until the construction of the entire box girder flange formwork is completed.

[0015] Further, in the formwork installation, first install the bottom formwork, and then install the side formwork, flange formwork, and inner formwork on the bottom formwork, and the bottom formwork, side formwork, flange formwork, and inner formwork are all bamboo plywood.

[0016] The present invention has the following beneficial effects: The present invention can realize the installation of formwork supports under special sites (such as crossing rivers, ports, slopes) and under hoisting height restrictions. When crossing a river in a special site, the erection of formwork supports for concrete box girder pouring is extremely restricted. Especially, the construction conditions of the formwork supports for the flange plates on the outer side are extremely difficult. By controlling the movable integrated formwork supports for the flange plates of the concrete box girder, after pouring one span, it can be controlled to move to the next span, greatly avoiding site restrictions. Furthermore, in the construction of the above special sites, the present invention overcomes the inconvenience of multiple erections in the original scaffolding construction and the limitation of the construction area of the scaffolding, which makes the hoisting equipment unable to travel to the designated construction area. The integrated support meets the requirement of one-time erection, and after the construction of one section, it can move to the next section and can be operated for automatic jacking and lowering.

[0017] The support for flange formwork construction in the present invention is built by a simple frame structure, enabling the formwork support to be prefabricated in a stable environment in advance according to the actual requirements of the on-site formwork, avoiding the cumbersome procedures and site restrictions of on-site assembly, and enabling the bearing capacity of the support to be pre-tested by preloading after prefabrication.

[0018] During the use of the present invention, especially when removing the formwork support, it can be slid to the designated area through the sliding mechanism, saving labor for rapid removal. That is, after the support in the present invention is moved into place, the operator can go up to independently install the formwork, or can directly install the formwork and slide it over.

[0019] In the present invention, an integrated formwork is formed through assembly and splicing, which has a low cost, a stable structure and a reserved operation passage, facilitating the construction operation at the flange plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The front view of the support for flange formwork construction provided by the present invention; Figure 2 The right view of the support for flange formwork construction provided by the present invention; Figure 3 One of the use state diagrams of the support for flange formwork construction provided by the present invention; Figure 4 One of the use state diagrams of the support for flange formwork construction provided by the present invention during sliding; Figure 5 The structural schematic diagram of the sliding mechanism provided by the present invention; Figure 6 The use state diagram when the support for flange formwork construction provided by the present invention is lowered; Figure 7 The flow chart during the application of the support for flange formwork construction provided by the present invention; In the figure: 1. Support body; 2. Support reinforcement; 3. Back rib; 4. Concrete formwork; 5. Operating platform; 6. Guardrail; 7. Travel mechanism; 8. Slipping mechanism; 9. Square wood cushion block; 10. Lifting mechanism. Specific embodiments

[0021] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. It should be noted, however, that these embodiments are not limitations on the present invention, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0022] Refer to the attached Figure 1-7 As shown, the support for flange formwork construction in the present invention mainly includes a support body 1, a support portion formed on the outer periphery of the support body, a back rib 3, an operating platform 5, and a guardrail 6. For the slipping during support construction, it also includes a travel mechanism 7, a slipping mechanism 8, and a square wood cushion block 9. Then, a number of concrete formworks 4 are arranged on the back rib 3.

[0023] In this embodiment, the back rib 3 forms the outer peripheral structure of the flange, and thus the formwork 4 is assembled along the assembly track on the outer peripheral structure of the hospital. In this embodiment, an integral flange formwork is selected to improve the assembly efficiency.

[0024] The support in this embodiment constitutes an integral concrete box girder flange formwork support: First, an external support of aluminum square steel forms the support body 1, which can bear the overall vertical and horizontal forces of the integral formwork and can adjust its structural size according to actual site requirements; second, round steel pipes are selected to enhance the lateral and vertical stability of the external support of aluminum square steel. The round steel pipes can be connected by snap locks, and the round steel pipes and aluminum square steel are connected by welding; in the present invention, the support body, the support portion, and the support reinforcement 2 are all made of aluminum square steel, which are welded together, more stable and convenient to disassemble. The present invention is mainly reflected in the case where the construction site is limited and it is inconvenient to erect the support, and an automated moving system is used to solve the problem, and the flange formwork is integral and does not require secondary erection.

[0025] The back rib 3 in this embodiment is welded to the external support of aluminum square steel to fix the concrete formwork; fourth, the concrete formwork is used to shape the poured concrete; fifth, the operating platform 5 is for operators to stand, arrange the upper formwork, and carry out transverse structure construction; sixth, the guardrail 6 plays a role in edge protection.

[0026] Preloading is carried out before formation, and there will be no safety hazards. The integral support does not need to be disassembled and installed multiple times compared with the climbing scaffold, and can be controlled to move automatically and jack up and lower in cooperation with the moving system. The main purpose of the sliding system in the present invention is that when facing a narrow space or when it is necessary to cross a water area for concrete pouring, it is very difficult to install and disassemble the formwork support with socket couplings. Therefore, in combination with the structural form of the integral box girder flange formwork support, a sliding mechanism that facilitates the installation and disassembly of the support is designed.

[0027] The traveling mechanism in the present invention selects a crawler-type traveling mechanism, which is convenient for moving the integral support; The sliding mechanism in the present invention is used to support the upper part under force and the sliding of the support, and uses I-beams; the ninth is a square wood cushion block, which is fixed on the track and used to unload the integral support, and the size can be adjusted according to actual needs. During the sliding, the present invention selects a crawler-type traveling mechanism, and a lifting mechanism 10 composed of a jack for unloading is connected to its side, and thus the effect is better.

[0028] Compared with the prior art, the support in this embodiment can be applied in the installation of the suspended formwork support or the formwork support in a narrow area.

[0029] The application process in this embodiment is as follows: S1) Erection of the sliding mechanism 8; S2) The support body 1 is driven by the traveling mechanism and slides along the sliding mechanism 8 to a position close to the construction position to be constructed, and then is hoisted to the construction position; S3) Formwork installation, steel bar binding, pouring, curing and formwork removal; S4) Jacking and unloading of the support body 1; S5) Repeat steps S2) to S4) until the construction of the entire box girder flange formwork is completed.

[0030] The present invention is used in a certain locally confidential project. This support system is applicable to the construction of a ramp portal. In this project, the west C ramp portal, the west 30m-span approach bridge 10#~11# pier portals, the west 55m-span approach bridge 12#~13# pier cross-dike supports, the west G / H parallel ramp cross-dike, the west G / H parallel ramp cross-river support and the east 30m approach bridge 32#~33# pier portals all adopt the construction with fewer supports. The support erection environment in this embodiment is near a water area, where manual and large-scale lifting equipment cannot enter and the operation space is narrow.

[0031] The first step: Assembly of the integral support; During construction, the welding and assembly of the integral support are carried out at the specified position. First, the welding of the external structure of the support is carried out, and 8*4cm aluminum square steel is used for welding, such as Figure 1 、 2As shown in . Then install the internal horizontal and vertical reinforcements, using 48mm round steel pipes, welding the contact position with the external aluminum square steel, and using horizontal round steel pipes to connect the vertical round steel pipes to enhance stability, as shown in Figure 1 , 2 As shown in the figure, a support body 1 with a support reinforcement 2 is formed. After the external and internal structures are installed, the back ribs 3 are welded, and 8*4cm aluminum square steel is also used. Finally, the operation space is set up on the back ribs 3. The pedal of the operation space can be made of conventional steel plates, and the guardrail is welded with round steel pipes.

[0032] Step 2: Pre-stress the bracket; After the integrated bracket is assembled, the bracket is adjusted according to the designed elevation before the frame is pre-stressed. A water tank is used for pre-loading test. After pre-loading, the plastic deformation of the foundation and the inelastic deformation of the bracket are basically eliminated. Through pre-loading, the elastic deformation value of the bracket is observed and calculated to adjust the elevation of the bottom template of the beam. After completion of the acceptance, the bracket is hoisted to the designated location.

[0033] In this embodiment, a pre-load test is performed, and the specific process is as follows: The main steps of the preloading test are original elevation data collection → loading 60% → settlement deformation observation → loading 100% → settlement deformation observation → loading 110% → settlement deformation observation → surface covering → unloading → deformation measurement → elevation adjustment.

[0034] In this embodiment, according to the Technical Specification for Preloading of Steel Pipe Full-Span Support (JGJT194-2009), the preloading load should be no less than 1.1 times the sum of the concrete structure dead load and the formwork weight. The formwork has been installed during the preloading of the support, so 1.1 times the structure dead load is taken as the preloading load. The deformation after unloading (i.e., the cumulative settlement of 110% ballast - the cumulative settlement after unloading) is the elastic deformation.

[0035] The third step is to set up the sliding mechanism; Before pouring concrete, it is necessary to set up a bracket sliding track at the location of the integrated bracket of the concrete box beam flange plate, such as Figure 5 As shown in the figure, I14 I-beam can be used as the sliding track. After the track is erected, a traction device (a winch or electric hoist can be used) is installed at the end operation position. Figure 4 As shown, after erection is completed, the integrated bracket is initially hoisted to the construction location.

[0036] Step 4: Template installation; The bottom formwork, side formwork, flange formwork and inner formwork are all made of high-strength bamboo plywood. On both sides of the beam bottom, the bottom formwork extends no less than 5 cm beyond the beam bottom edge line to facilitate the erection of the side formwork on the bottom formwork. A temporary manhole of 150×120 cm is opened on the top formwork at the center of each box chamber to facilitate formwork removal. After formwork removal, the reserved temporary manhole is filled by the suspended formwork method.

[0037] After the preloading is qualified, readjust the elevation and camber of the bottom plate. Ink lines are snapped on the bottom formwork, and then the remaining formwork is installed. Release agent is applied before formwork installation, and sponge rubber strips are pasted at the formwork joints to prevent leakage of mortar. Vertical and horizontal ribs are arranged on the outside of the side formwork and connected to the support with steel pipes and fasteners to support and fix the side formwork. At the same time, tie rods are set between the inner formwork and the side formwork for fixation, with one set every 1 m.

[0038] In this embodiment, when erecting the inner formwork, the chamfer inner formwork is prefabricated off-site and hoisted into the box chamber for installation. Square timbers are longitudinally placed at the chamfer position of the inner formwork, and transverse I-beams are placed at intervals of 1.5 m on the square timbers. As shown in the figure, three vertical rods are combined into a stable body on the transverse I-beams, and the distance between the vertical rods is 130 - 140 cm (adjusted according to the width of the box chamber). After the horizontal cross bars are fixed, they are extended to both sides to support the formwork of the two webs. After the vertical rods are installed, the top brackets are installed. The extension of the top brackets is adjusted according to the elevation of the top formwork, and then the transverse channel steel is installed, and then the wooden square timbers and the top plate formwork are laid. Since the box girder adopts the one-time integral pouring process, when laying the bottom formwork of the top plate, it is considered to longitudinally set a feeding port of 30×30 cm above the cavity of each box chamber, with a spacing of 6 - 10 m, which is closed after the concrete of the bottom and web is poured.

[0039] Step 5: Support removal; After the prestress tensioning is completed, the jack (i.e., the lifting mechanism) is used to lift the position of the square timber cushion block 9 on the sliding mechanism, as Figure 6 shown, so as to remove the square timber cushion block 9. After removal, the integral formwork can fall naturally. Then, the integral formwork can be slid and dragged by using the traction system. After being dragged to the designated position, it can be lifted by a crane, greatly saving the construction site.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0041] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A support for flange formwork construction, characterized in that: include, A support body forming a support portion in at least two directions; Located on the support part, with a plurality of back ribs of the assembly template, the plurality of back ribs form an assembly track of the integrated flange template; A sliding mechanism, wherein the sliding mechanism forms a suspended connecting track, and a walking mechanism located on the support body forms a driving force for driving the support body to move along the sliding mechanism to the construction position of the flange formwork; An operating platform is arranged at the highest point of the support body, and a guardrail is arranged along the outer periphery of the operating platform.

2. The flange formwork construction support according to claim 1, characterized in that: The walking mechanism is a crawler-type walking mechanism, and a lifting mechanism is linked to the outer side of the crawler-type walking mechanism.

3. The flange formwork construction support according to claim 2, characterized in that: It also includes a plurality of support members located on the sliding mechanism and arranged along the length direction of the connecting track, wherein the plurality of support members form a support surface during the lifting of the lifting mechanism.

4. The flange formwork construction support according to claim 1, characterized in that: The sliding mechanism is a 114-type I-beam, which forms a permanent connection between the Bailey frame and the concrete box beam.

5. The flange formwork construction support according to claim 1, characterized in that: It also includes a support reinforcement member located in a support body formed by welding aluminum square tubes. The support reinforcement member is arranged in a cross shape in a frame formed by the support body.

6. The method for constructing a flange formwork support on a suspended formwork support according to any one of claims 1 to 5, characterized in that: The following steps are involved: Assembly welding of the bracket body and welding of the upper back ribs along the support part of the bracket body; Height adjustment and pre-load test of the bracket body, and calculation of the elastic deformation value of the bracket through the pre-load test, wherein the pre-load test is specifically carried out through a water tank; The bracket body slides and is hoisted along the sliding mechanism.

7. Application of the flange formwork construction bracket according to any one of claims 1 to 5 in the installation of suspended formwork brackets or narrow area formwork brackets.

8. The use according to claim 7, characterized in that: The installation of the suspended formwork support specifically includes installation of a formwork across a river, installation of a formwork across a port, installation of a formwork across a slope, or installation of a formwork under a lifting height restriction.

9. The use according to claim 7, characterized in that: The application specifically comprises the following steps: S1) Setting up the sliding mechanism; S2) The support body is driven by the walking mechanism, slides along the sliding mechanism to a position close to the construction location, and then hoisted to the construction location; S3) Formwork installation, reinforcement binding, pouring, maintenance and formwork removal; S4) Lifting and unloading of the support body; S5) Repeat steps S2) to S4) until the construction of the entire box girder flange formwork is completed.

10. The use according to claim 9, characterized in that: During the template installation, the bottom template is installed first, and then the side template, the flange template and the inner template are installed on the bottom template, and the bottom template, the side template, the flange template and the inner template are all made of bamboo plywood.

Images