CN219117960U

CN219117960U - Deep V valley oblique leg support

Info

Publication number: CN219117960U
Application number: CN202320021237.2U
Authority: CN
Inventors: 张德长; 柳祖徽; 彭浩; 梅慧浩; 苗健; 张春宝
Original assignee: China Railway 11th Bureau Group Co Ltd; First Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
Current assignee: China Railway 11th Bureau Group Co Ltd; First Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-06-02
Anticipated expiration: 2033-01-05

Abstract

The utility model relates to the technical field of bridge construction, in particular to a deep V-valley diagonal leg support. The bridge pier comprises a steel pipe column surrounding the periphery of a bridge pier body, a steel pipe platform at the top of the steel pipe column and a bottom expansion foundation; the top end of the steel pipe column is fixedly connected with the steel pipe platform, and an inclined support is arranged between the steel pipe platform and the steel pipe column; the top end of the steel pipe platform is provided with a bearing platform, the bearing platform is supported and arranged on the steel pipe platform through a plurality of pieces of section steel, and a full framing is erected on the bearing platform; the bottom end of the steel pipe column is fixedly connected to the bottom expansion foundation, and the bottom expansion foundation is anchored with the pier bottom tie beam through embedded bars into a whole. The inclined leg support combines the full framing with the steel pipe support, solves the problem that the existing support has limitation in steep slope areas, particularly in deep V valley areas, and can better improve the safety and stability of bridges in deep V valley construction.

Description

Deep V valley oblique leg support

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a deep V-valley diagonal leg support.

Background

In recent years, the requirements on bridge construction technology are also increasing while the construction of highway bridges in China is rapidly developing. Along with wide-span reinforced concrete simply supported box girders applied to mountain areas and valley areas, the overall stability of a bridge structure is an important problem to be ensured in construction, and a support structure is a common structural form for enhancing the overall stability. The existing bracket method is used as one of the main construction methods of bridge construction, and a fastener, a plate buckle full framing or a few steel pipe brackets are generally adopted, however, the full framing has high requirements on site areas and is not suitable for valley areas; the few steel pipe supports are driven into a certain depth through the upright posts or directly act on the enlarged foundation to bear vertical load generated by construction, the construction is performed in a valley region with complex topography and weak foundation, the stability of the steel pipe foundation directly influences the safety of the supports and the quality of bridge construction, and the type of supports have great limitations in steep slope regions, particularly in deep V valley regions. Therefore, how to better improve the safety and stability of the bridge in deep V-valley construction is worthy of further research.

Disclosure of Invention

The utility model aims at: the deep V-valley diagonal leg support is convenient to set up and good in construction safety, and combines a full framing with a steel pipe support.

The technical scheme of the utility model is as follows:

a deep V-valley diagonal leg support comprises steel pipe columns surrounding the periphery of a pier body, a steel pipe platform at the top of each steel pipe column and a bottom expansion foundation; the method is characterized in that: the top end of the steel pipe column is fixedly connected with the steel pipe platform, and an inclined support is arranged between the steel pipe platform and the steel pipe column; the top end of the steel pipe platform is provided with a bearing platform, the bearing platform is supported and arranged on the steel pipe platform through a plurality of pieces of section steel, and a full framing is erected on the bearing platform; the bottom end of the steel pipe column is fixedly connected to the bottom expansion foundation, and the bottom expansion foundation is anchored with the pier bottom tie beam through embedded bars into a whole.

Further, an embedded steel plate is arranged on the bottom expansion foundation, and the steel pipe column is fixedly connected to the embedded steel plate.

Further, the embedded steel plate is provided with finish rolling deformed steel bars, and the finish rolling deformed steel bars are embedded in the bottom expansion foundation and are connected through the anchor backing plate and the bolts.

Further, one end of the inclined support is anchored on the steel pipe column, the other end of the inclined support is obliquely arranged and fixedly connected to the bottom surface of the steel pipe platform, and the inclined support and the steel pipe platform horizontal section steel form a triangular truss structure.

Furthermore, the diagonal bracing is provided with two in the vertical direction of each group of adjacent steel pipe columns and steel pipe platforms.

Further, steel pipe connecting supports are arranged around the steel pipe columns and are respectively and fixedly connected between the adjacent steel pipe columns, and the steel pipe connecting supports and the bottom ends of the oblique supports are arranged at the same horizontal height; and a reinforcing diagonal brace is arranged between the steel pipe connecting braces.

Further, the length of the inclined support is sequentially adjusted according to the connection position with the steel pipe platform.

Further, the bearing platform comprises a bearing girder and a bearing girder, and the bearing girder is welded and fixed on the upper part of the bearing girder; one end of the bearing longitudinal beam is supported on the bridge abutment, and the other end of the bearing longitudinal beam is supported on the steel pipe platform.

Furthermore, the top of a full framing erected on the upper part of the bearing platform is provided with a top adjustable support.

The utility model has the beneficial effects that:

1. the bottom expansion foundation expands the load transmitted by the upper structure to a certain bottom area by expanding to the side, so that the compressive stress acting on the foundation is equal to or smaller than the allowable bearing capacity of foundation soil, and the stress in the foundation simultaneously meets the strength requirement of the material, and the reinforced concrete has strong bending resistance and is not limited by a rigid angle;

2. the downward load of the bearing platform to the bridge pier is shared by the steel pipe column and the steel pipe bracket formed by the oblique support, so that the construction safety is improved;

3. the full framing erected on the bearing platform has less auxiliary equipment, can reduce the waste of manpower and material, is suitable for multi-span cast-in-situ beam construction, ensures the engineering quality, can accelerate the construction progress, and has good economic benefit;

the utility model adopts the inclined bracket to connect the steel pipe bracket with the bearing platform, transmits the construction load to the steel pipe bracket through the V-shaped inclined leg and combines the advantages of the steel pipe bracket and the full framing on the basis of expanding the bottom surface, can effectively solve the problem of erecting the deep V-shaped valley bracket, and can also effectively ensure the safety of construction.

Description of the drawings:

FIG. 1 is a schematic elevational view of the construction assembly of the present utility model;

FIG. 2 is a schematic side view of the construction assembly of the present utility model;

fig. 3 is a schematic structural view of the stent of the present utility model.

In the figure: 1. a bottom expansion foundation; 2. a steel pipe column; 3. connecting and supporting the steel pipes; 4. a diagonal support; 5. a steel pipe platform; 6. a bearing main beam; 7. a bearing longitudinal beam; 8. a full framing; 9. a top adjustable support; 10. embedding a steel plate; 11. and (3) pier.

The specific embodiment is as follows:

the following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

As shown in figures 1-3, the deep V-shaped valley diagonal leg support comprises a steel pipe column 2 surrounding the periphery of a pier 11, a steel pipe platform 5 at the top of the steel pipe column 2 and a bottom expansion foundation 1; the top end of the steel pipe column 2 is fixedly connected with a steel pipe platform 5, and an inclined support 4 is arranged between the steel pipe platform 5 and the steel pipe column 2; the top end of the steel pipe platform 5 is provided with a bearing platform which is supported and arranged on the steel pipe platform 5 through a plurality of section steel, and a full framing 8 is erected on the bearing platform; the bottom end of the steel pipe column 2 is fixedly connected to the bottom expansion foundation 1, and the bottom expansion foundation 1 is anchored with the bottom tie beam of the pier 11 through embedded bars into a whole.

The bottom expansion foundation 1 is provided with an embedded steel plate 10, and the steel pipe column 2 is fixedly connected to the embedded steel plate 10. In practice, the steel pipe column 2 is usually fixed to the pre-buried steel plate 10 by welding. The embedded steel plate 10 is provided with finish rolling deformed steel bars, the finish rolling deformed steel bars are embedded in the bottom expansion foundation 1 and are connected through an anchor backing plate and bolts.

One end of the inclined support 4 is anchored on the steel pipe column 2, the other end of the inclined support 4 is obliquely arranged and fixedly connected to the bottom surface of the steel pipe platform 5, and the inclined support 4 and the steel pipe platform 5 form a triangular truss structure with horizontal section steel.

The diagonal bracing 4 is provided with two lines in the height direction between each group of steel pipe columns 2 and the steel pipe platform 5.

The steel pipe column 2 set up steel pipe connection and prop 3 all around, set up at same level with the bottom of diagonal brace 4, link firmly respectively between adjacent steel pipe column 2, weld the reinforcement bracing as required between the adjacent steel pipe connection and prop 3. The steel pipe connecting support 3 is arranged to improve the overall stability of the steel pipe column 2.

The length of the diagonal support 4 is sequentially adjusted according to the length of the bearing longitudinal beam 7. The bearing longitudinal beam 7 has different size and length according to the topography and the design requirement, and the diagonal support 4 needs to be formulated according to the design requirement in order to achieve the effective supporting effect.

The bearing platform comprises a bearing main beam 6 and a bearing longitudinal beam 7; the bearing girder 6 and the bearing girder 7 are vertically and horizontally arranged, the bearing girder 7 is welded on the upper part of the bearing girder 6 along the axial direction of the bridge, the bearing girders 6 connect each bearing girder 7 into a whole, one end of the bearing girder 7 is supported on the bridge abutment, the other end is supported on the steel pipe platform 5, and various loads are supported and transferred to the piers and the platforms.

The top of the full framing 8 erected on the upper portion of the bearing platform is provided with the top adjustable support 9, so that the length of the support can be adjusted according to actual requirements in construction, and the construction requirements can be met conveniently and rapidly.

In the concrete construction process,

four sides of the bridge pier 11 are respectively provided with two steel pipe columns 2, the bottom ends of the steel pipe columns 2 are fixedly connected with the bottom surface expansion foundation, the embedded steel plates 10 in the expansion foundation surface are welded on the embedded steel pipes, the perpendicularity of the steel pipe columns 2 and the plane pile position precision are ensured, and the stability and firmness of the foundation of the steel pipe columns 2 are ensured;

the top end of the steel pipe column 2 is welded with a steel pipe platform 5, the steel pipe platform 5 comprises a plurality of groups of horizontal section steel, two diagonal supports 4 are welded between the adjacent horizontal section steel and the steel pipe column 2, and the diagonal supports 4 and the steel pipe platform 5 horizontal section steel form a triangular truss structure; simultaneously, two adjacent steel pipe columns 2 are welded with a steel pipe connecting support 3, the bottom ends of the steel pipe connecting support 3 and the inclined support 4 are arranged at the same horizontal height, and a reinforcing inclined support is welded between the steel pipe connecting supports 3.

The top end of the steel pipe platform 5 is provided with a bearing platform, the bearing platform is supported and welded on the steel pipe platform 5 through a plurality of pieces of section steel, a bearing girder 6 and a bearing girder 7 are arranged vertically and horizontally, the bearing girder 7 is axially arranged and welded on the upper part of the bearing girder 6 along a bridge, and after the bearing girder 6 and the bearing girder 7 are provided with a wheel buckle type full framing 8; the top of the full framing 8 is provided with a top adjustable support 9.

The above description is merely a preferred embodiment of the present utility model, and the above illustration is not to be construed as limiting the spirit of the present utility model in any way, and any simple modification or variation of the above embodiments according to the technical spirit of the present utility model, and equivalent embodiments that may be changed or modified to equivalent variations using the above disclosed technical spirit of the present utility model, will fall within the scope of the technical solutions of the present utility model, without departing from the spirit and scope of the present utility model.

Claims

1. A deep V-valley diagonal leg support comprises a steel pipe column (2) surrounding the periphery of a pier body of a pier (11), a steel pipe platform (5) at the top of the steel pipe column (2) and a bottom expansion foundation (1); the method is characterized in that: the top end of the steel pipe column (2) is fixedly connected with the steel pipe platform (5), and an inclined support (4) is arranged between the steel pipe platform (5) and the steel pipe column (2); the top end of the steel pipe platform (5) is provided with a bearing platform, the bearing platform is supported and arranged on the steel pipe platform (5) through a plurality of pieces of section steel, and a full framing (8) is erected on the bearing platform; the bottom end of the steel pipe column (2) is fixedly connected to the bottom expansion foundation (1), and the bottom expansion foundation (1) is anchored with the bottom tie beam of the pier (11) through embedded bars into a whole.

2. The deep V valley diagonal leg stent of claim 1, wherein: the steel pipe column is characterized in that an embedded steel plate (10) is arranged on the bottom expansion foundation (1), and the steel pipe column (2) is fixedly connected to the embedded steel plate (10).

3. The deep V valley leg rest of claim 2, wherein: the embedded steel plate (10) is provided with finish rolling deformed steel bars, and the finish rolling deformed steel bars are embedded in the bottom expansion foundation (1) and are connected through an anchor backing plate and bolts.

4. The deep V valley diagonal leg stent of claim 1, wherein: one end of the inclined support (4) is anchored on the steel pipe column (2), the other end of the inclined support is obliquely arranged and fixedly connected to the bottom surface of the steel pipe platform (5), and the inclined support (4) and the steel pipe platform (5) form a triangular truss structure with horizontal section steel.

5. The deep V valley leg rest of claim 4, wherein: the diagonal support (4) is provided with two paths in the vertical direction of each group of adjacent steel pipe columns (2) and steel pipe platforms.

6. The deep V valley leg rest of claim 5, wherein: the length of the inclined support (4) is sequentially adjusted according to the connection position with the steel pipe platform (5).

7. The deep V valley diagonal leg stent of claim 1, wherein: the steel pipe column (2) set up steel pipe connection support (3) all around, link firmly respectively between adjacent steel pipe column (2), set up at same level with the bottom of diagonal bracing (4), set up between steel pipe connection support (3) and consolidate the bracing.

8. The deep V valley diagonal leg stent of claim 1, wherein: the bearing platform comprises a bearing main beam (6) and a bearing longitudinal beam (7), wherein the bearing longitudinal beam (7) is welded and fixed on the upper part of the bearing main beam (6), one end of the bearing longitudinal beam (7) is supported on the bridge abutment, and the other end of the bearing longitudinal beam is supported on the steel pipe platform (5).

9. The deep V valley diagonal leg stent of claim 1, wherein: the top of a full framing (8) erected on the upper part of the bearing platform is provided with a top adjustable support (9).