Cast-in-place box girder self-propelled movable formwork system

Abstract

The utility model relates to a cast-in-place box beam self-propelled movable formwork system, which is characterized in that a plurality of movable door plates are arranged on a web of a main beam, so that the self weight of the main beam can be reduced, a door opening is formed through the movable door plates to achieve a ventilation effect, and the influence of wind power on the main beam is reduced; the main beam and the cross beams are connected through the flange plates, the left cross beam and the right cross beam are spliced into a whole through the flange plates, a worker can enter the cross beams through the main beam web door opening for mounting and dismounting, and the mounting efficiency and convenience of the main beam and the cross beams are improved; when a cast-in-place box girder formwork is erected, the left cross beam and the right cross beam are spliced into a whole, the combined horizontal cross beams are also combined into a whole, and a formwork system can be rapidly installed. When the main beam longitudinally slides, the front beam, the left beam and the right beam are separated, the combined horizontal beam is separated into two parts, back ridges and telescopic supporting rods do not need to be dismantled, a large amount of time can be saved, and the installation and dismantling efficiency of a formwork system is improved.

Description

Technical Field

[0001] This utility model relates to a self-propelled mobile formwork system for cast-in-place box girders, which is mainly suitable for cast-in-place box girder formwork construction in complex ground conditions, such as cliffs, seaside, crossing rivers, lakes, and existing railway lines, where it is impossible to erect a full-span scaffold. It is especially suitable for slipform construction of cast-in-place box girders with a span of less than 60m on high piers. Background Technology

[0002] With the continuous development of bridge construction technology in my country, self-propelled mobile formwork, with its advantages of being unrestricted by foundation conditions, unaffected by crossing rivers and valleys, and easy to move, is increasingly widely used in cast-in-place box girder construction. The mobile formwork utilizes bridge piers as supports and forms an integral part of the piers, bearing various loads during the construction of the cast-in-place box girder. The main components of a self-propelled formwork can be divided into a load-bearing system, a guiding system, a support system, a propulsion system, a lateral connection system, a formwork system, a guide beam system, a corbel transport system, and auxiliary systems.

[0003] The following are the main problems in the current mobile formwork installation process: (1) The main beam is large in size, heavy in weight, and has a heavy load. It is greatly affected by wind when on high piers; (2) It is difficult to connect the main beam and the crossbeam, and the installation and dismantling operations are inconvenient. Workers cannot directly enter the crossbeam from the main beam to carry out installation and dismantling operations; (3) The formwork support structure adopts a hybrid rod support. When the main beam moves longitudinally through the hole after the casting of a box girder section, the hybrid support needs to be completely removed. When the next box girder section is to be cast, the formwork support structure needs to be re-erected, which is time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need to invent a simple and effective self-propelled mobile formwork system for cast-in-place box girders, which can reduce the self-weight of the main girder, reduce the impact of wind on the main girder, improve the convenience of connecting and installing the main girder and the crossbeam, and improve the efficiency of installing and dismantling the formwork support structure during the formwork erection and longitudinal movement of the main girder. Utility Model Content

[0005] The purpose of this utility model is to provide a self-propelled mobile formwork system for cast-in-place box girders, which has good technical and economic benefits.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The self-propelled mobile formwork system for cast-in-place box girders includes piers, high-strength steel plates with grooves, main beams, left crossbeams, right crossbeams, bolts, main beam webs, combined horizontal crossbeams, bottom formwork, inner formwork, cast-in-place box girders, side formwork, back ribs, telescopic support rods, and corbel support system.

[0008] The lower part of the main beam is equipped with two rows of pulleys, which can slide along the grooves on the upper part of the high-strength steel plate with grooves;

[0009] The main beam web is provided with a plurality of movable door plates, the movable door plates can move horizontally, and the main beam web forms a hole after the movable door plates move; the main beam web is uniformly provided with flange seats at intervals;

[0010] The left cross beam and the right cross beam are provided with flange plates at the end portions, the flange plates are connected with the flange seats through bolts, the flange plate of the left cross beam is butted with the flange plate of the right cross beam, and the two are connected into an integrated body; the left cross beam and the right cross beam are both provided with a plurality of screw jacks at the upper portions, and the screw jacks are fixed with the combined horizontal cross beam at the upper portions;

[0011] The end portions of the combined horizontal cross beam are connected with back struts through a hinged mode, the back struts are supported on the top of the main beam through telescopic supporting rods, the bottom die is laid on the upper portion of the combined horizontal cross beam, and the side die is laid on the upper portion of the back struts;

[0012] The end portion of the first section main beam is provided with a nose beam, the main beam is supported on the corb support system of the pier column, the main beam drives the whole die frame system to slide along the line longitudinally forward under the pushing action of the external force hydraulic jacking system, and the nose beam assists in longitudinally moving through the hole.

[0013] Further, the left cross beam and the right cross beam are connected with the flange seats of the main beam through the flange plates, after the main beam is slid to the next pier column, the main beam can be transversely moved to the center line of the pier, so that the left cross beam and the right cross beam can be butted, and the flange plates of the two can be connected through bolts.

[0014] Further, the two adjacent left cross beams are provided with cross braces for reinforcing connection, and the two adjacent right cross beams are also provided with cross braces for reinforcing connection.

[0015] Further, the combined horizontal cross beam is divided into left and right sections and assembled, and is separated or combined with the left cross beam and the right cross beam.

[0016] Further, the back struts are composed of a plurality of sections and are connected through a hinged mode, and the telescopic supporting rods can be freely telescoped.

[0017] Further, when the main beam longitudinally slides through the hole, the left cross beam and the right cross beam are separated into independent structures, and the combined horizontal cross beam is separated into two parts.

[0018] The utility model has the following characteristics and beneficial effects:

[0019] 1) The utility model is provided with movable door plates on the main beam, which not only reduces the weight of the main beam, but also forms door holes through the movable door plates to achieve ventilation effect and reduce the influence of wind force on the main beam.

[0020] 2) The main beam and the cross beam are connected through flange plates, the left cross beam and the right cross beam are also connected into an integrated body through flange plates, workers can enter the cross beam through the door holes of the main beam web to install and remove, and the installation efficiency and convenience of the main beam and the cross beam are improved.

[0021] 3) The utility model discloses when the main beam moves to the center line of the pier column, drives left and right cross beams to move together, after left and right cross beams are assembled into an entirety, the combined horizontal cross beam also is integrated, and the installation of back lath, telescopic support rod and formwork can be quickly carried out, when the cast-in-place box girder is poured, before the longitudinal sliding of the main beam, the elevation of the main beam is reduced, the main beam is moved to the lateral direction of the pier column, left and right cross beams are separated, and the combined horizontal cross beam is separated into two parts, after the formwork is separated from the concrete, only the formwork needs to be removed, and the back lath and telescopic support rod do not need to be removed, so that a large amount of box girder formwork support system installation and removal time can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the main beam and left and right cross beam connecting structure diagram (left and right cross beams are separated independent structure) of the utility model;

[0023] Figure 2 It is the main beam and left and right cross beam connecting structure diagram (left and right cross beams are integrated) of the utility model;

[0024] Figure 3 It is the main beam structure detail view of the utility model cast-in-place box girder self-propelled movable formwork system;

[0025] Figure 4 It is the left and right cross beam separation and splicing schematic view of the utility model;

[0026] Figure 5 It is the cross bracing reinforcing structure view between adjacent two cross beams of the utility model;

[0027] Figure 6 It is the structure view of the utility model cast-in-place box girder formwork when self-propelled movable formwork system;

[0028] Figure 7 It is the structure view of the utility model main beam longitudinal movement when self-propelled movable formwork system;

[0029] Figure 8 It is the main beam-nose beam integrated structure longitudinal movement across (hole) schematic view of the utility model.

[0030] 1, pier column;16, high-strength steel plate with sliding groove;17, sliding groove;18, pulley;19, main beam;26, flange seat;27, flange plate;28, left cross beam;29, right cross beam;30, bolt;31, main beam web;32, moving door plate;33, screw jack;34, cross bracing;35, combined horizontal cross beam;36, base mold;37, inner mold;38, cast-in-place box girder;39, side mold;40, back lath;41, telescopic support rod;42, corbel support support system;43, nose beam. DETAILED DESCRIPTION

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] The working principle of the hydraulic jacking system for longitudinal movement of the main beam, the principle of horizontal and vertical movement of the main beam, the connection structure between the flange seat and the flange plate, the structure of the movable door panel on the web of the main beam, the spiral jack structure and its working principle, the template size, the connection between the template and the back rib, the connection method between the back rib and the telescopic support rod, the concrete pouring process, the connection structure between the nose beam and the main beam, the working principle of the nose beam assisting the longitudinal movement of the main beam through the hole, the structure of various types of bolts, the steel plate welding technology, etc., will not be repeated here. The focus is on describing the implementation method of the structure of this utility model.

[0034] like Figures 1-3 The diagram shows the connection structure between the main beam and the left and right crossbeams, including a high-strength steel plate 16 with a groove, a groove 17, pulleys 18, a main beam 19, a flange seat 26, a main beam web 31, and movable door panels 32. The lower part of the main beam 19 is provided with two rows of pulleys 18, which can slide along the groove 17 on the upper part of the high-strength steel plate 16 with a groove. The main beam web 31 is provided with multiple movable door panels 32, which can move horizontally. The horizontal movement structure of the movable door panels 32 is similar to the sliding structure of a glass window. After the movable door panels 32 move, holes are formed on the main beam web 31. Flange seats 26 are provided at even intervals on the main beam web 31.

[0035] like Figure 1 , 4The diagram shown in Figure -5 illustrates the separation and splicing of the left and right crossbeams. It includes the main beam 19, flange seat 26, flange 27, left crossbeam 28, right crossbeam 29, bolts 30, screw jacks 33, and cross braces 34. Flanges 27 are located at the ends of the left and right crossbeams 28 and 29, respectively. Both the left and right crossbeams 28 and 29 are connected to the flange seat 26 of the main beam 19 via flanges 27, which are then connected to the flange seat 26 via bolts 30. Multiple screw jacks 33 are located on the upper part of both the left and right crossbeams 28 and 29. Cross braces 34 reinforce the connection between adjacent left crossbeams 28, and similarly, cross braces 34 reinforce the connection between adjacent right crossbeams 29.

[0036] like Figure 6 The diagram shows the structure of the self-propelled mobile formwork system for cast-in-place box girder support. It includes a main beam 19, left crossbeam 28, right crossbeam 29, spiral jack 33, combined horizontal crossbeam 35, bottom formwork 36, inner formwork 37, cast-in-place box girder 38, side formwork 39, back ribs 40, and telescopic support rods 41. After the main beam 19 slides longitudinally onto the next pier section 1, it moves laterally towards the pier centerline, causing both the left and right crossbeams 28 and 29 to move laterally towards the pier centerline. The flange 27 of the left crossbeam 28 and the flange 27 of the right crossbeam 29 are connected by bolts 30. The combined horizontal crossbeam 35 is fixed to the upper part of the spiral jack 33. The combined horizontal crossbeam 35 is assembled in two sections, left and right, which separate and merge along with the separation and reassembly of the left and right crossbeams 28 and 29. During the casting of the box girder 38, the left crossbeam 28 and the right crossbeam 29 are combined into one, and the two sections of the combined horizontal crossbeam 35 are automatically spliced ​​into one. The ends of the combined horizontal crossbeam 35 are connected to the back rib 40 by hinge. The back rib 40 is composed of multiple sections, and each section is connected by hinge. The angle of the template can be adjusted as needed. The back rib 40 is supported on the top of the main beam 19 by telescopic support rod 41. The telescopic support rod 41 can freely extend and retract to ensure the stability of the support. The bottom formwork 36 is laid on the top of the combined horizontal crossbeam 35, and the side formwork 39 is laid on the top of the back rib 40.

[0037] like Figure 7 The diagram shows the structure of the self-propelled moving formwork system when the main beam moves longitudinally. It includes the main beam 19, the left crossbeam 28, the right crossbeam 29, and the combined horizontal crossbeam 35. When the main beam 19 slides longitudinally through the hole, the left crossbeam 28 and the right crossbeam 29 separate into independent structures, and the combined horizontal crossbeam 35 separates into two parts.

[0038] like Figure 8The shown main beam-nose beam integrated structure longitudinal moving over span (hole) schematic view, including pier 1, main beam 19, bracket support support system 42, nose beam 43 and so on, the most front section main beam 19 end is equipped with nose beam 43, main beam 19 is supported on the bracket support support system 42 on pier 1, main beam 19 is driven entire mould frame system along the line longitudinal forward sliding under the driving action of external force hydraulic jacking system, through nose beam 43 auxiliary longitudinal moving over hole, the working principle of nose beam 43 auxiliary longitudinal moving over hole is similar to the structure of being equipped with guide beam when steel box beam is pushed over span.

[0039] The part not described in detail of the utility model is prior art, so the utility model does not perform detailed description to it.

[0040] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0041] Although professional terms are used more in this paper, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

[0042] The utility model is not limited to the above best mode, and anyone can derive other various forms of products under the inspiration of the utility model, but regardless of any change in shape or structure, any technical solution with the same or similar to the utility model falls within the protection scope of the utility model.

Claims

1. A self-propelled movable formwork system for cast-in-situ box girder, characterized in that, It includes pier column (1), high-strength steel plate with sliding chute (16), main beam (19), left cross beam (28), right cross beam (29), bolt (30), main beam web (31), combined horizontal cross beam (35), bottom die (36), inner die (37), cast-in-place box girder (38), side die (39), back spline (40), telescopic support rod (41), bracket support support system (42). The lower part of the main beam (19) is provided with two rows of pulleys (18), which can slide in the sliding chute (17) on the upper part of the high-strength steel plate with sliding chute (16). The main beam web (31) is provided with a plurality of movable door plates (32), which can move horizontally, and the main beam web (31) forms a hole after the movable door plate (32) moves. The left cross beam (28) and the right cross beam (29) are provided with flanges (27) at the ends, which are connected with the flange seats (26) through bolts (30); the flanges (27) of the left cross beam (28) and the right cross beam (29) are butt-jointed, and the two are connected into one body; the upper parts of the left cross beam (28) and the right cross beam (29) are provided with a plurality of screw jacks (33), and the upper parts of the screw jacks (33) are fixed with combined horizontal cross beams (35). The end of the combined horizontal cross beam (35) is connected with the back spline (40) through a hinged way, the back spline (40) is supported on the top of the main beam (19) through the telescopic support rod (41), and the bottom die (36) is laid on the upper part of the combined horizontal cross beam (35). The end of the main beam (19) of the first section is provided with a nose beam (43), the main beam (19) is supported on the bracket support support system (42) on the pier column (1), the main beam (19) drives the whole mold frame system to slide along the line longitudinally under the pushing action of the external force hydraulic jacking system, and the nose beam (43) assists the longitudinal movement through the hole.

2. The self-propelled movable formwork system for cast-in-situ box girder according to claim 1, characterized in that, The left cross beam (28) and the right cross beam (29) are connected with the flange seats (26) of the main beam (19) through the flanges (27), and after the main beam (19) is slid to the next pier column (1), the main beam (19) can be transversely moved to the center line of the pier, so that the left cross beam (28) and the right cross beam (29) can be butt-jointed, and the flanges (27) of the two can be connected through bolts (30).

3. The self-propelled movable formwork system for cast-in-situ box girder according to claim 1, characterized in that, Adjacent two of the left cross beams (28) are provided with cross braces (34) for strengthening connection, and adjacent two of the right cross beams (29) are also provided with cross braces (34) for strengthening connection.

4. The self-propelled movable formwork system for cast-in-situ box girder according to claim 1, characterized in that, The combined horizontal cross beam (35) is divided into left and right sections and assembled, and is separated and combined with the left cross beam (28) and the right cross beam (29).

5. The self-propelled movable formwork system for cast-in-situ box girder according to claim 1, characterized in that, The back spline (40) is composed of multiple sections, and is connected through a hinged way between each section, and the telescopic support rod (41) can be freely extended and shortened.

6. The self-propelled movable formwork system for cast-in-situ box girder according to any one of claims 1-5, characterized in that, When the main beam (19) slides longitudinally through the hole, the left cross beam (28) and the right cross beam (29) are separated into independent structures, and the combined horizontal cross beam (35) is separated into two parts.

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