Large cantilever prestress cast-in-place cover beam

Abstract

The utility model relates to a large cantilever prestress cast-in-place cover beam which comprises a bearing platform, an attached support, an integrated module, a high stand column cable-stayed system and a self-propelled large cantilever cover beam tensioning hanging basket. Pier column steel bars are arranged on the bearing platform, sand roofs are installed on the side edges of the pier column steel bars through corbels, and the attached support is installed on the sand roofs and comprises a main beam section and a cantilever beam section. The integrated module is laid on the attached support. The utility model has the beneficial effects that the holes are reserved on the pier column structure and the high-strength pin rods are mounted, and meanwhile, the attached bracket is modularly manufactured, connected and mounted, so that compared with the traditional support system, the operation is simple and convenient, the construction safety is high, the construction efficiency is effectively improved, and the overall construction quality of the bracket can be effectively improved; the multiple distributive girders and the checkered steel plates are divided into a plurality of modules and are welded and fixed, and the protective barriers are fixedly mounted on the peripheries of the distributive girders, so that the risk of head warping during mounting of a single distributive girder is reduced.

Description

Technical Field

[0001] The utility model relates to the field of bridge cap beam construction, in particular to a large cantilever prestressed cast-in-situ cap beam. Background Art

[0002] The development of urban viaducts has greatly promoted local economic development and met the travel needs of the local population. However, due to limitations in the surrounding environment, traffic requirements, and landscape requirements, high requirements are placed on the substructure of the bridge. Large cantilever prestressed cap beams are simple and elegant in shape and can save space under the bridge, so they are widely used in urban viaducts. Currently, there are many difficulties in the construction of large cantilever cap beams. Compared with ordinary concrete cap beams, the stress conditions of prestressed large cantilever cap beams are more complex, and a large number of temporary structures are required during construction.

[0003] Traditional large cantilever cap beam construction techniques often face challenges such as insufficient support frame stability, complex support installation and removal, and low secondary tensioning efficiency. These challenges not only increase project costs but can also lead to construction delays and safety risks. Therefore, research on large cantilever prestressed cast-in-place cap beams is of great significance. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a large cantilever prestressed cast-in-situ cap beam.

[0005] This large cantilever prestressed cast-in-place cap beam includes a cap, an attached bracket, an integrated module, a high column cable-stayed system, and a self-propelled large cantilever cap beam tensioning basket;

[0006] Pier column reinforcement is set on the foundation, and the side of the pier column reinforcement is installed with a sand top through a bracket. The attached bracket is installed on the sand top. The attached bracket includes a main beam segment and a cantilever beam segment; the integrated module is laid on the attached bracket;

[0007] The high column cable-stayed system consists of a steel pipe column and a hanger. The steel pipe column is installed on the base. A balance beam is provided on the top of the steel pipe column. One end of the hanger passes through the balance beam and is connected to a jack. The other end is connected to the main beam segment.

[0008] The self-propelled large cantilever cap beam tensioning hanging basket comprises an upper supporting frame; a bottom platform frame is hung below the upper supporting frame, and rollers are provided on the bottom surface of the upper supporting frame.

[0009] As preferred, the pier column top joint is provided with pier column reinforcement, the pier column side edge is provided with high-strength pin rod installation hole, the high-strength pin rod and the corbel are installed, the sand top is installed on the corbel, and the attached support is installed and placed on the sand top; the attached support comprises a main beam segment, a cantilever beam segment, a steel inclined strut, a longitudinal scissors strut and an inner support, and the main beam segment and the cantilever beam segment are connected through a flange interface; the bottom of the cantilever beam segment is provided with a steel inclined strut connected with the main beam segment, the bottom of the steel inclined strut is fixed with the main beam segment through a bottom plate and a flange interface, and the top of the steel inclined strut is arranged with a top plate welded and fixed with the cantilever beam segment; the longitudinal scissors strut is arranged between the main beam segments, and the inner support is arranged between the cantilever beam segments.

[0010] As preferred, a plurality of distribution beams are integrally formed into a module by being welded and fixed with the patterned steel plate in blocks, the distribution beams, the lower main beam segments and the cantilever beam segments are all fixedly connected by using U-shaped bolts, and guardrails are arranged on the upper portions of the distribution beams.

[0011] As preferred, a steel pipe column is fixedly installed on the bearing platform, the steel pipe column segments are spliced and installed through flanges and bolts, a plurality of column vertical braces and column inclined braces are arranged in the lateral direction of the bridge, a channel steel connecting system is arranged in the longitudinal direction of the bridge, the top of the steel pipe column is filled with concrete, a balance beam is arranged on the top of the steel pipe column, the bottom of the suspender is connected with the main beam segment by using a pin bolt, and a foot prop and a jack are arranged on the top of the suspender and pass through the balance beam, so as to tension and pre-tighten the suspender.

[0012] As preferred, the self-propelled large-suspension cantilever beam tensioning basket comprises an upper support frame, a climbing ladder, a vertical suspender, an electric drive system, a roller and a bottom platform frame; the upper support frame is provided with four supporting legs and four rollers, and the electric drive system is used for providing power to drive the roller to move; the bottom platform frame is provided with a surrounding frame around the periphery, and the surrounding frame is connected with the vertical suspender through a cable-stayed rod; the climbing ladder is vertically arranged between the upper support frame and the bottom platform frame.

[0013] The utility model discloses beneficial effect is:

[0014] 1) the utility model discloses reserving the hole in the pier column structure and installing high-strength pin rod, and the attached support is modularized production, connection installation simultaneously, compared with the operation of traditional support system is simple, and the construction safety is high, and the construction efficiency is effectively improved, and the overall construction quality of support can be effectively improved.

[0015] 2) the utility model discloses that several modules are formed by dividing and welding a plurality of distribution beams and patterned steel plates, and guardrails are fixedly installed around the distribution beams, so that the risk of head lifting during installation of a single distribution beam is reduced, the overall installation efficiency is improved, and the safety of high-altitude operation is ensured.

[0016] 3) The utility model adopts a high-column diagonal structure to reinforce the support. By arranging diagonal hangers and using jacks for pre-tensioning, the integrity and bearing capacity of the support system are improved. On the basis of ensuring construction safety, the support system has high convenience and the overall construction quality of the high pier column and large cantilever prestressed cap beam support system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the large cantilever cap beam attached bracket technology;

[0018] Figure 2 This is a schematic diagram of the longitudinal arrangement of the attached bracket;

[0019] Figure 3 This is a schematic diagram of the support installation inside the cantilever beam segment;

[0020] Figure 4 This is a technical diagram of the integrated setup of distribution beam and patterned steel plate;

[0021] Figure 5 This is a schematic diagram of the high column cable-stayed technology;

[0022] Figure 6 This is the side view of the top structure of the steel pipe column;

[0023] Figure 7 This is a schematic diagram of the self-propelled large cantilever cap beam tensioning basket structure.

[0024] Explanation of the accompanying symbols: 1-main beam segment, 2-pier column reinforcement, 3-flange interface, 4-cantilever beam segment, 5-sand top, 6-corbel, 7-cap, 8-high-strength pin, 9-pier, 10-top plate, 11-steel diagonal brace, 12-bottom plate, 13-longitudinal scissors brace, 14-inner support, 15-distribution beam, 16-railing, 17-patterned steel plate, 18-U-bolt, 19-jack, 20-balance beam , 21-foot support, 22-filling concrete, 23-hanging rod, 24-pin, 25-column parallel connection, 26-column diagonal brace, 27-steel pipe column, 28-flange, 29-bolt, 30-channel steel connection system, 31-ladder, 32-vertical hanger, 33-bottom platform frame, 34-enclosing frame, 35-diagonal rod, 36-electric drive system, 37-roller, 38-leg, 39-upper support frame. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0026] As an example, a large cantilever prestressed cast-in-place cap beam, such as Figures 1 to 7 As shown, it is used to reduce the occupation of the lower space by the support system during the construction of the cap beam, improve the construction efficiency and construction stability of the large cantilever prestressed cast-in-place cap beam, and thus effectively improve the overall construction quality on the basis of ensuring construction safety.

[0027] This large cantilever prestressed cast-in-place cap beam involves large cantilever cap beam attachment support technology, integrated distribution beam and patterned steel plate installation technology, high column diagonal tensioning technology, and self-propelled large cantilever cap beam tensioning hanging basket technology. It includes a cap 7, an attachment support, an integrated module, a high column diagonal tensioning system, and a self-propelled large cantilever cap beam tensioning hanging basket.

[0028] like Figure 1 As shown, pier column reinforcement 2 is set on the base 7, and the sand top 5 is installed on the side of the pier column reinforcement 2 through the corbel 6. The attached bracket is installed on the sand top 5. The attached bracket includes a main beam segment 1 and a cantilever beam segment 4; the integrated module is laid on the attached bracket.

[0029] like Figure 5 As shown, the high column cable-stayed system includes a steel pipe column 27 and a hanger 23. The steel pipe column 27 is installed on the base 7. A balance beam 20 is provided at the top of the steel pipe column 27. One end of the hanger 23 passes through the balance beam 20 and is connected to the jack 19, and the other end is connected to the main beam segment 1.

[0030] like Figure 7 As shown, the self-propelled large cantilever cap beam tensioning hanging basket includes an upper support frame 39; a bottom platform frame 33 is suspended below the upper support frame 39, and a roller 37 is provided on the bottom surface of the upper support frame 39.

[0031] like Figure 1 and Figure 3As shown, the large cantilever cap beam attached support technology is proposed. After the construction of the lower bridge pedestal 7 and pier 9 structures is completed, the pier column steel bars 2 at the top joint are exposed. Due to the limitation of the site under the bridge, the large cantilever cap beam attached support technology is proposed. During the construction of the pier column 9, the installation holes of the high-strength pin rods 8 are reserved. After the construction of the pier column 9 is completed, the high-strength pin rods 8 and the bracket 6 components are installed. The sand top 5 is installed on the bracket 6 to facilitate the fine adjustment of the height of the attached support. After the attached support is assembled, the support is hoisted and installed on the sand top 5 using lifting equipment. The attached support is mainly composed of the main beam segment 1, the cantilever beam segment 4. It is composed of steel diagonal braces 11, longitudinal scissors braces 13, and internal supports 14. In order to improve the installation efficiency, the main beam segment 1 and the cantilever beam segment 4 are spliced ​​in modules, and each segment is connected by a flange interface 3; the bottom of the cantilever beam segment 4 is also provided with a steel diagonal brace 11 to strengthen the connection with the main beam segment 1, and the bottom of the steel diagonal brace 11 is fixed to the flange interface 3 on the main beam segment 1 through the bottom plate 12, and the top plate 10 is arranged on the top of the steel diagonal brace 11 and welded to the cantilever beam segment 4; longitudinal scissors braces 13 are provided between the main beam segments 1, and internal supports 14 are provided between the cantilever beam segments 4 to improve the structural stability.

[0032] like Figure 4 As shown, the distribution beam-patterned steel plate integrated setting technology adopts an integrated setting of the upper distribution beam 15 and the patterned steel plate 17 after the installation of the attached bracket is completed to improve the integrity and installation efficiency. A single distribution beam 15 is prone to warping when placed on the main beam of the bracket, so multiple distribution beams 15 and the patterned steel plate 17 are welded and fixed in blocks to form a module. The distribution beam 15 and the lower main beam segment 1 and the cantilever beam segment 4 are fixedly connected with U-bolts 18, and a protective railing 16 is provided on the upper part of the distribution beam 15 to ensure on-site construction safety.

[0033] Example 2

[0034] As another embodiment, this embodiment 2 proposes a more specific large cantilever prestressed cast-in-place cap beam based on the embodiment 1:

[0035] like Figure 5 and Figure 6As shown, the high column inclined-stayed technology, when the pier 9 is high and the span of the cap beam is large, in order to improve the construction efficiency of the support and ensure safety, a steel pipe column 27 is set to inclined-stayed reinforcement of the support, and the steel pipe column 27 is fixedly installed on the pedestal 7. The segments of the steel pipe column 27 are spliced ​​and installed by flanges 28 and bolts 29. The steel pipe column 27 is provided with multiple column parallel joints 25 and column diagonal braces 26 in the transverse direction of the bridge, and a channel steel connection system 30 is provided in the longitudinal direction of the bridge to strengthen the overall stability of the steel pipe column 27. The top of the steel pipe column 27 is filled with concrete 22 for counterweight reinforcement, and a balance beam 20 is provided on the top. After the installation of the steel pipe column 27 is completed, the hanger 23 is installed. The bottom of the hanger 23 is connected to the main beam segment 1 with a pin 24, and a foot support 21 and a jack 19 are provided on the top through the balance beam 20 to tension and pre-tighten the hanger 23. By setting up the steel pipe column 27 and using the hanger 23 to inclined-stay the main beam segment 1, the bearing capacity and stability of the structure are improved.

[0036] like Figure 7 As shown, the self-propelled large cantilever cap beam tensioning basket is mainly composed of an upper support frame 39, a ladder 31, a vertical boom 32, an electric drive system 36, a roller 37 and a bottom platform frame 33; the upper support frame 39 is made of channel steels welded together, and is provided with four legs 38 and four rollers 37. During construction, the electric drive system 36 provides power to drive the rollers 37 to move, thereby improving on-site construction efficiency; the bottom platform frame 33 is surrounded by a guard frame 34 component, and is connected to the vertical boom 32 through a diagonal rod 35; the ladder 31 is vertically arranged between the upper support frame 39 and the bottom platform frame 33, for operators to pass through during construction.

[0037] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0038] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A large cantilever prestressed cast-in-situ cap beam, characterized by: It includes a cap, an attached support, an integrated module, a high column cable-stayed system and a self-propelled large cantilever cap beam tensioning basket; Pier column reinforcement is set on the foundation, and the side of the pier column reinforcement is installed with a sand top through a bracket. The attached bracket is installed on the sand top. The attached bracket includes a main beam segment and a cantilever beam segment; the integrated module is laid on the attached bracket; The high column cable-stayed system consists of a steel pipe column and a hanger. The steel pipe column is installed on the base. A balance beam is provided on the top of the steel pipe column. One end of the hanger passes through the balance beam and is connected to a jack. The other end is connected to the main beam segment. The self-propelled large cantilever cap beam tensioning hanging basket comprises an upper supporting frame; a bottom platform frame is hung below the upper supporting frame, and rollers are provided on the bottom surface of the upper supporting frame.

2. The large cantilever prestressed cast-in-situ cap beam according to claim 1 is characterized in that: Pier column reinforcement is set at the top joint of the pier column, high-strength pin rod installation holes are reserved on the side of the pier column, high-strength pin rods and corbels are installed, sand tops are installed on the corbels, and attached brackets are installed and placed on the sand tops; the attached brackets include main beam segments, cantilever beam segments, steel diagonal braces, longitudinal scissors braces and internal supports, and the main beam segments and cantilever beam segments are connected through flange interfaces; steel diagonal braces are provided at the bottom of the cantilever beam segments to connect with the main beam segments, and the bottom of the steel diagonal braces is fixed to the flange interface on the main beam segment through the bottom plate, and a top plate is arranged on the top of the steel diagonal brace to be welded and fixed to the cantilever beam segment; longitudinal scissors braces are provided between the main beam segments, and internal supports are provided between the cantilever beam segments.

3. The large cantilever prestressed cast-in-situ cap beam according to claim 1 is characterized in that: Multiple distribution beams are welded and fixed to patterned steel plates in blocks to form an integrated module. The distribution beams are fixed to the lower main beam segments and cantilever beam segments using U-bolts, and a guardrail is provided on the upper part of the distribution beams.

4. The large cantilever prestressed cast-in-situ cap beam according to claim 1 is characterized in that: Steel pipe columns are fixedly installed on the pedestal. The steel pipe column segments are spliced ​​and installed by flanges and bolts. The steel pipe columns are provided with multiple column parallel joints and column diagonal braces in the transverse direction of the bridge, and a channel steel connection system is provided in the longitudinal direction of the bridge. The top of the steel pipe column is filled with concrete, and a balance beam is provided on the top of the steel pipe column. The bottom of the hanger is connected to the main beam segment with a pin, and a foot support and a jack are provided on the top through the balance beam for tensioning and pre-tightening the hanger.

5. The large cantilever prestressed cast-in-situ cap beam according to claim 1 is characterized in that: The self-propelled large cantilever cap beam tensioning basket includes an upper support frame, a ladder, a vertical boom, an electric drive system, rollers and a bottom platform frame; the upper support frame is provided with four legs and four rollers, and the electric drive system is used to provide power to drive the rollers to move; the bottom platform frame is surrounded by a guard frame, and the guard frame is connected to the vertical boom through a diagonal rod; the ladder is arranged vertically between the upper support frame and the bottom platform frame.

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