Full-assembly type large cantilever formwork supporting frame for cast-in-place of concrete beam

Abstract

The utility model discloses a full-assembly type large cantilever formwork supporting frame for cast-in-place of concrete beams. The full-assembly type large cantilever formwork supporting frame is provided with a bearing platform supporting structure, and a pair of steel pipe stand columns are erected on the two sides of a pier body in the transverse bridge direction. Cantilever cross rods on two sides are arranged on the tops of the steel pipe stand columns in the transverse bridge direction, so that the extension lengths of the rod ends of the cantilever cross rods on the two sides meet the width requirement of the upper concrete beam; the inclined support rod is supported between the far end of the cantilever cross rod and the column body of the steel pipe column to form a triangular support for the cantilever cross rod; unloading blocks are arranged on the top surfaces of the steel pipe upright post and the cantilever cross rod; a bearing beam is placed on the top face of the unloading block in the transverse bridge direction, a bailey beam is arranged on the top face of the bearing beam in the bridge direction, a distribution beam is arranged on the top face of the bailey beam in the transverse bridge direction, a large cantilever formwork supporting frame is formed, a formwork support system is arranged through the distribution beam, and cast-in-place construction of a concrete beam is achieved. The construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete beam construction for bridge superstructure, and more specifically to a fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams. Background Technology

[0002] To make fuller use of the space beneath bridges, most urban elevated bridge piers are designed as vase-shaped piers or large cantilever piers, leaving more space for planned ground-level roads. This results in vase-shaped piers and large cantilever piers having a transverse width much smaller than the width of the superstructure concrete beam. When using a beam-column support system to cast the superstructure concrete beam, the traditional method is to widen the pier cap transversely to meet the support requirements of the steel pipe columns. However, widening the pier cap transversely involves complex construction procedures, high costs, and also increases the safety risk of foundation settlement. Utility Model Content

[0003] This utility model aims to overcome the shortcomings of the existing technology by providing a fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams. It precisely matches the cast-in-place construction of concrete beams with vase-shaped piers or large cantilever piers, ensuring project quality, simplifying the support frame structure, and reducing construction costs.

[0004] The present invention adopts the following technical solution to solve the technical problem:

[0005] The features of this utility model of a fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams are:

[0006] The pier support structure is constructed by pre-embedding climbing bolts in the pier cap, with steel pipe columns fixedly connected to these bolts at the bottom. A pair of steel pipe columns are supported on both sides of the pier body in the transverse direction. Cantilever crossbars are installed on both sides of the top of the steel pipe columns in the transverse direction, ensuring that the extension length of the ends of the cantilever crossbars meets the width requirements of the upper concrete beam. Diagonal bracing is installed between the distal end of the cantilever crossbar and the body of the steel pipe column, forming a triangular support for the cantilever crossbar. Unloading blocks are installed at the connection nodes between the steel pipe columns and the cantilever crossbars, and at the distal ends of the cantilever crossbars. A load-bearing beam is placed transversely on the top surface of the unloading blocks, a Bailey bridge beam is installed longitudinally on the top surface of the load-bearing beam, and a distribution beam is installed transversely on the top surface of the Bailey bridge beam, forming a large cantilever formwork support frame. The distribution beam is also used to install a formwork support system to enable the cast-in-place construction of the concrete beam.

[0007] The feature of this utility model of a fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams is that the steel pipe column is composed of modular segments fixedly connected by flange bolts.

[0008] The full assembly type large cantilever formwork support frame for cast-in-situ concrete beam has the characteristics that: the steel pipe stand columns are connected into a whole through the connecting system between the two steel pipe stand columns on the two sides of the transverse bridge of the pier body, and the steel pipe stand columns and the pier body are fixed through the through core pull rod to form a wall connecting piece.

[0009] The full assembly type large cantilever formwork support frame for cast-in-situ concrete beam has the characteristics that: the steel pipe stand columns are connected into a whole through the connecting system between the two steel pipe stand columns on the two sides of the transverse bridge of the pier body, and the steel pipe stand columns and the pier body are fixed through the through core pull rod to form a wall connecting piece.

[0010] The full assembly type large cantilever formwork support frame for cast-in-situ concrete beam has the characteristics that: the steel pipe stand columns are connected into a whole through the connecting system between the two steel pipe stand columns on the two sides of the transverse bridge of the pier body, and the steel pipe stand columns and the pier body are fixed through the through core pull rod to form a wall connecting piece.

[0011] The full assembly type large cantilever formwork support frame for cast-in-situ concrete beam has the characteristics that: the steel pipe stand columns are connected into a whole through the connecting system between the two steel pipe stand columns on the two sides of the transverse bridge of the pier body, and the steel pipe stand columns and the pier body are fixed through the through core pull rod to form a wall connecting piece.

[0012] Compared with the prior art, the full assembly type large cantilever formwork support frame for cast-in-situ concrete beam has the beneficial effects that:

[0013] 1. The upper part of the steel pipe stand column is provided with the inclined support rod and the cantilever cross bar to form a triangular support structure, the formwork support frame is erected on the small bearing platform, the bearing platform does not need to be expanded, the requirements of the wide or long cantilever concrete beam cast-in-situ construction are met, and the construction cost is greatly saved.

[0014] 2. The full assembly type structure is adopted, the bolt connection and the pin shaft connection are adopted between the components of the support frame, the welding is not needed in the installation and dismounting process, the operation is convenient, and the construction efficiency is improved.

[0015] 3. The climbing cone is adopted at the bottom of the steel pipe stand column to replace the connection between the traditional embedded bolt and the bearing platform, the installation and dismounting process is very convenient, the climbing cone bolt is repeatedly used, and the construction cost is greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a front view structural schematic diagram of the utility model;

[0018] Figure label: 1 bearing platform, 2 climbing cone bolt, 3 pier body, 4 steel pipe column, 5 diagonal brace, 6 cantilever crossbar, 7 unloading block, 8 bearing beam, 9 Bailey beam, 10 distribution beam, 11 formwork support system, 12 concrete beam, 13 flange bolt, 14 connecting system, 15 through tie rod, 16 pin shaft, 17 middle section strip foundation. DETAILED DESCRIPTION

[0019] Reference Figure 1 and Figure 2 , the structure of the full assembly large cantilever formwork support frame for cast-in-place concrete beam in this embodiment is:

[0020] The bearing platform support structure is set by embedding climbing cone bolts 2 in the bearing platform 1, fixing the steel pipe columns 4 at the bottom with the climbing cone bolts 2, and standing a pair of steel pipe columns 4 on both sides of the transverse bridge of the pier body 3; two cantilever crossbars 6 are set at the top of the steel pipe columns 4 in the transverse bridge direction, so that the extension length of the ends of the two cantilever crossbars 6 meets the width requirement of the upper concrete beam; diagonal braces 5 are set, which are supported between the distal ends of the cantilever crossbars 6 and the column bodies of the steel pipe columns 4, forming a triangular support for the cantilever crossbars 6; unloading blocks 7 are respectively set at the connecting nodes of the steel pipe columns 4 and the cantilever crossbars 6, and at the distal ends of the cantilever crossbars 6; bearing beams 8 are placed on the top surfaces of the unloading blocks 7 in the transverse bridge direction, Bailey beams 9 are set on the top surfaces of the bearing beams 8 in the longitudinal bridge direction, and distribution beams 10 are set on the top surfaces of the Bailey beams 9 in the transverse bridge direction, forming a large cantilever formwork support frame, and the distribution beams 10 are provided with a formwork support system 11 to realize the cast-in-place construction of the concrete beam 12.

[0021] The corresponding technical measures in this embodiment also include:

[0022] To realize assembly and assembly, the steel pipe columns 4 are composed of various modular segments connected by flange bolts 13, and different specifications and lengths of steel pipe columns 4 are connected by flange bolts 13 to form the required length according to the construction needs.

[0023] To form a large cantilever support structure, the cantilever crossbars 6 are made of section steel, one end of which is provided with an ear plate connected to the side ear plate of the steel pipe column 4 through a pin shaft 16 to form a whole, and the diagonal braces 5 are made of seamless steel pipes, both ends of which are provided with ear plates connected to the side ear plates of the steel pipe columns 4 and the ear plates below the end of the cantilever crossbar 6 through pin shafts 16 to form a whole.

[0024] To enhance the stability of the formwork support frame, a pair of steel pipe columns 4 standing on both sides of the transverse bridge of the pier body 3 are connected into a whole through the connecting system 14, which is composed of channel steel welded into a "Z" shape and connected to the steel pipe columns 4 through pin shafts, and the steel pipe columns 4 and the pier body 3 are connected through the through tie rod 15 to form a wall connecting piece, and the through tie rod 15 is made of finished rolled threaded steel and its matching products.

[0025] Pin 16 is used to assemble and connect between steel pipe column 4 and connecting system 14, between steel pipe column 4 and inclined bracing 5, and between steel pipe column 4 and cantilever crossbar 6, without welding in the process of assembly and disassembly, which is more conducive to the quality control of formwork support frame assembly and improves construction efficiency.

[0026] According to the weight of concrete beam 12 and the need of support frame span, middle strip foundation 17 is arranged at a set interval between adjacent pier body 3, the bearing capacity of the foundation under middle strip foundation 17 should meet the design requirements, and middle support structure is arranged on middle strip foundation 17 in two rows as a group, the middle support structure and the pile cap support structure arranged on pile cap 1 are of the same structure, and connecting system 14 is arranged between the two rows of steel pipe columns 4 in the longitudinal direction to form a whole.

[0027] Berger beam 9 is a standard segment with a length of 3m, 2m or 1m and a height of 1.5m, in order to enhance the stability of the formwork support frame, pin shaft is used to connect between adjacent Berger beam segments in the longitudinal direction, two pieces of Berger beam are connected into a whole through the formwork support frame in the transverse direction, Berger beam 9 is fixed between bearing beam 8 and distribution beam 10 through a limiting device and U-shaped bolt.

[0028] In the specific implementation, before the pouring of pile cap 1 concrete, climbing cone bolt 2 is pre-buried at the set position of pile cap 1, after the completion of pier body 3 construction, steel pipe column 4 is hoisted by hoisting equipment and screwed onto climbing cone bolt 2, inclined bracing 5 and cantilever crossbar 6 are installed at the set position of steel pipe column 4 to form a cantilever triangular support structure, and unloading block 7 is arranged on the top surface of steel pipe column 4 and cantilever crossbar 6.

[0029] Bearing beam 8 and distribution beam 10 are both general standard steel, unloading block 7, Berger beam 9 and other accessories are all standardized products, which are convenient for procurement and turnover. In order to ensure construction safety, the erection quality and bearing capacity of the formwork support frame should be inspected after the completion of erection, and it can be used only after passing the inspection.

Claims

1. A fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams, characterized in that: The pier support structure is set up by pre-embedding climbing bolts (2) in the pier (1), and fixing steel pipe columns (4) to the climbing bolts (2) at the bottom. A pair of steel pipe columns (4) are supported on both sides of the pier body (3) in the transverse direction. On the top of the steel pipe columns (4), cantilever crossbars (6) are set on both sides in the transverse direction, so that the extension length of the ends of the cantilever crossbars (6) meets the width requirements of the upper concrete beam. Diagonal bracing (5) is set up, which is supported between the far end of the cantilever crossbar (6) and the column body of the steel pipe column (4), forming a support for the cantilever crossbar. (6) Triangular support; at the connection node between the steel pipe column (4) and the cantilever crossbar (6), and at the far end of the cantilever crossbar (6), respectively, a slack block (7) is set; a load-bearing beam (8) is placed transversely on the top surface of the slack block (7), a Bailey beam (9) is set longitudinally on the top surface of the load-bearing beam (8), and a distribution beam (10) is set transversely on the top surface of the Bailey beam (9) to form a large cantilever formwork support frame. The distribution beam (10) is also set with a formwork support system (11) to realize the cast-in-place construction of the concrete beam (12).

2. The fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams according to claim 1, characterized in that: The steel pipe column (4) is composed of modular segments fixedly connected by flange bolts (13).

3. The fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams according to claim 1, characterized in that: The pair of steel pipe columns (4) on both sides of the transverse bridge direction supported on the pier (3) are connected into a whole by a connecting system (14), and the steel pipe columns (4) in the longitudinal direction are fixed to the pier (3) by a through tie rod (15).

4. The fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams according to claim 1, characterized in that: The steel pipe column (4) is assembled and connected to the connecting system (14), between the steel pipe column (4) and the diagonal brace (5), and between the steel pipe column (4) and the cantilever crossbar (6) using pins (16).

5. The fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams according to claim 1, characterized in that: According to the weight of the concrete beam (12) and the span of the support frame, a middle strip foundation (17) is set at a set interval between adjacent piers (3). A middle support structure is set in two rows on the middle strip foundation (17). The middle support structure has the same structure as the pier support structure set on the pier (1). A connecting system (14) is set between the two rows of steel pipe columns (4) in the longitudinal direction of the bridge to form an integral whole.

6. The fully prefabricated large cantilever formwork support frame for cast-in-place concrete beams according to claim 1, characterized in that: The Bailey beam (9) is a standard segment with a length of 3m, 2m or 1m and a height of 1.5m. Adjacent Bailey beam segments in the longitudinal direction are connected by pins, and two Bailey beams in the transverse direction are connected as a whole by a template support frame.

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