CN102407567B - Production pedestal for quickly prefabricating T-shaped beam - Google Patents

Abstract

The invention discloses a rapid prefabricated T-beam production pedestal, which comprises a heavy-load area track foundation, a light-load area track foundation placed in the longitudinal direction of the heavy-load area track foundation, and a light-load area track foundation placed on the heavy-load area track foundation and light-load area track Rail connection embedded parts in the foundation, rails installed on the rail connection embedded parts, placed in the heavy-duty area track foundation concrete and exposed T-beam outer formwork embedded parts, laid on the heavy-duty area track foundation and light Lime-soil cushion under the track foundation in the loading area. It can complete the steel bar binding, formwork installation and other processes on the track foundation of the light load area, and complete the concrete pouring, form removal, tensioning, maintenance and other processes on the track foundation of the heavy load area. The track foundation of the heavy load area and the track foundation of the light load area are respectively Design, perform their own duties, simple structure, reasonable design, suitable for rapid prefabricated T-beams, strong structural integrity, small overall engineering volume and wide application range.

Description

Rapid prefabrication of T-beam production pedestals

technical field

The invention relates to a bridge prefabricated production facility, in particular to a rapid prefabricated T-beam production platform.

Background technique

Normal-speed railway and heavy-duty railway bridges will adopt T-shaped simply supported beams with light weight, small size, low cost, and easy transportation and erection. From the perspectives of technology, transportation, construction period and cost, etc. Manufacturing, on-line wheel-rail beam transport vehicles as the main line, offline tire beam transport vehicles as auxiliary beam transport, side-laying and side-frame beam erection combined with first erection and then laying" are the main modes of railway T-beam construction.

With the development of railway construction norms and the improvement of relevant policies and regulations, the standardization, standardization, and refined planning and design of T-beam prefabrication yards will further improve land utilization and reduce civil investment, and realize the standardized construction and industrialization of prefabrication yards. , mechanization, informatization, and specialized production are issues of common concern to construction, design, and construction units. T-beam production pedestal is a concrete structure that provides a platform for T-beam production in the beam area. The beam-making pedestal has the highest utilization rate in the civil structure of the precast yard. One of the cores of T-beam precast yard construction is T-beam Layout and design of prefabricated pedestals.

In the prior art, factory-made beams and on-site beams have been produced with fixed T-beam production pedestals, that is, steel bar binding, formwork installation, concrete pouring, formwork removal, tensioning, and removal of pedestals are completed on the same T-shaped beam production pedestal. There are many problems in the environment, work efficiency, labor cost and working hours in all processes.

Contents of the invention

The purpose of the present invention is to provide a rapid prefabricated T-beam production platform with simple and reasonable structure, small amount of reinforced concrete and other materials, easy construction, short construction period, and overall structural rigidity meeting the specification requirements.

The present invention is achieved through the following technical solutions:

The rapid prefabricated T-beam production base of the present invention includes a track foundation in a heavy-load area and a track foundation in a light-load area;

The upper plane of the track foundation in the heavy-duty area is rectangular, its length is greater than or equal to the length of the prefabricated T-beam, and its width is greater than the width of the top plate of the prefabricated T-beam;

The track foundation of the light-load area is located at the top of the longitudinal direction of the track foundation of the heavy-load area, and its upper plane is rectangular, and its length is greater than or equal to the length of the prefabricated T-beam;

The track foundation in the heavy-load area and the track foundation in the light-load area are respectively provided with two rows of rail connecting embedded parts, and rails are installed on the rail connecting embedded parts, and the rails on the track foundation in the heavy-load area are connected to the rails in the heavy-load area. The continuous butt joint of rails on the track foundation in the light load area;

The track foundation in the heavy-duty area is provided with a T-beam outer mold embedded part, and the T-shaped beam outer mold embedded part is arranged on the outside of the two rows of rail connecting embedded parts;

A lime-soil cushion is laid under the track foundation of the heavy-load area and the track foundation of the light-load area.

It can be seen from the above-mentioned technical scheme provided by the present invention that the rapid prefabricated T-beam production pedestal of the present invention can be used under light load due to the arrangement of the track foundation in the heavy-load area and the track foundation in the light-load area, which are connected by rails. On the basis of the track in the heavy-load area, complete the processes of steel bar binding and formwork installation, and on the basis of the track in the heavy-load area, complete the procedures of concrete pouring, form removal, tensioning, and maintenance. The track foundation in the heavy-load area and the track foundation in the light-load area perform their respective duties It does not conflict with each other, makes full use of the site and improves work efficiency, and forms an automatic and rapid prefabricated T-beam; distinguishes the track foundation in the heavy-load area and the track foundation in the light-load area, and can control the structural design of the track foundation according to the heavy load and light load respectively. And according to the calculation results, different foundation section forms and foundation treatment forms are adopted to ensure the structural strength, rigidity and control uneven settlement while fully reducing the amount of reinforced concrete; the rails are placed in the rail connection of the track foundation in the heavy-load area and the track foundation in the light-load area On top of the embedded parts, the rails can be reused to improve economy. The design is reasonable, the structure is simple, safe and reliable, and the adaptability is strong, which can realize automatic and rapid prefabrication of T-beams.

Description of drawings

Fig. 1 is the plane layout schematic diagram of the specific embodiment of fast prefabricated T-beam production pedestal of the present invention;

Fig. 2 is a schematic diagram of the plane structure of the heavy-duty zone track foundation in a specific embodiment of the present invention;

Fig. 3 is a schematic diagram of the facade structure of the track foundation in the heavy-duty area in a specific embodiment of the present invention;

Fig. 4 is a schematic diagram of the A-A cross-sectional structure of the track foundation in the heavy-duty area in a specific embodiment of the present invention;

Fig. 5 is a schematic diagram of the plane structure of the track foundation in the light load area in a specific embodiment of the present invention;

Fig. 6 is a schematic diagram of the facade structure of the track foundation in the light load area in a specific embodiment of the present invention;

Fig. 7 is a schematic diagram of the B-B cross-sectional structure of the track foundation in the light load area in a specific embodiment of the present invention.

Explanation of reference signs:

1-track foundation in heavy-duty area; 2-track foundation in light-load area; 3-rail connection embedded parts; 4-rail; 5-T-beam outer mold embedded parts; 6-lime soil cushion; ; 8-steel plate; 9-buckle rail plate.

Detailed ways

The preferred specific implementation of the rapid prefabricated T-beam production pedestal of the present invention is shown in Figures 1 to 7:

Including track foundation 1 in the heavy load area and track foundation 2 in the light load area;

The upper plane of the track foundation 1 in the heavy-duty area is rectangular, its length is greater than or equal to the length of the prefabricated T-beam, and its width is greater than the width of the top plate of the prefabricated T-beam;

The track foundation 2 in the light-load area is located at the top in the longitudinal direction of the track foundation 1 in the heavy-load area, and its upper plane is rectangular, and its length is greater than or equal to the length of the prefabricated T-beam;

The track foundation 1 in the heavy-load area and the track foundation 2 in the light-load area are respectively provided with two rows of rail connection embedded parts 3, and rails 4 are installed on the rail connection embedded parts 3, and the track foundation in the heavy-load area The steel rail on 1 is continuously docked with the steel rail 4 on the track foundation 2 in the light-load area;

The track foundation 1 in the heavy-duty area is provided with a T-beam outer mold embedded part 5, and the T-shaped beam outer mold embedded part 5 is arranged on the outside of the two rows of rail connecting embedded parts 3;

A lime-soil cushion 6 is laid under the track foundation 1 in the heavy-load area and the track foundation 2 in the light-load area.

The track foundation 1 in the heavy-load area and the track foundation 2 in the light-load area are reinforced concrete structures respectively, and the track foundation 1 in the heavy-load area and the track foundation 2 in the light-load area are connected as a whole by steel rails 4 .

The track foundation 1 in the heavy-duty area is an integral reinforced concrete structure, and the top surface is higher than the surrounding ground.

The track foundation 2 in the light load area is two reinforced concrete structures parallel to each other, and the top surface is equal to the top surface of the track foundation 1 in the heavy load area.

The rail connection embedded part 3 includes a steel plate 8 , the lower surface of the steel plate 8 is welded with a hook steel bar 7 , and the upper surface of the steel plate 8 is installed with a buckle rail plate 9 .

The rail 4 is connected to the rail connection embedded part 3 through a rail buckle plate 9 .

The embedded part of the T-beam outer formwork includes a steel plate 8, and the lower surface of the steel plate 8 is welded with a hook steel bar 7.

The design principle of the present invention is discussed below:

The track foundation in the heavy-load area is divided into three possible most unfavorable working conditions: the first working condition after the T-beam is poured and not stretched; The beam is the third working condition; the load of the first working condition is basically evenly distributed on the track foundation in the heavy-duty area, the load of the second working condition is more concentrated on both ends of the track foundation in the heavy-loading zone, and the third working condition should consider the heavy-duty moving load at Heavy load running on the rails; models should be established for the beam-making pedestal under the three working conditions to calculate the internal force of the member and the reaction force of the foundation, and the most unfavorable working condition is used to control the calculation and design.

The track foundation in the light-load area is divided into two possible most unfavorable working conditions: the T-beam steel formwork is installed and the track foundation is static and the light-load area is the first working condition, and the T-beam steel formwork is installed. After the longitudinal sliding is the second working condition In the first working condition, the load is basically evenly distributed on the track foundation in the light-loaded area, and in the second working condition, light-load moving loads should be considered to run lightly on the rail; models should be established for the beam-making pedestal under the two working conditions respectively. Calculation of component internal force and foundation reaction force, and take the most unfavorable working condition to control calculation and design.

In the specific structural design and calculation, it is necessary to realize automatic and fast operation. The track foundation in the heavy-load area and the track foundation in the light-load area are set up and connected by steel rails. The steps of steel bar binding and formwork installation are completed on the track foundation in the light-load area. , Concrete pouring, form removal, tensioning, maintenance and other processes are completed on the track foundation in the heavy-load area. The track foundation in the heavy-load area and the track foundation in the light-load area perform their duties without conflicting with each other; Depending on the load of the track foundation, the structural design of the track foundation is controlled according to the heavy load and light load respectively, and different foundation section forms and foundation treatment forms are adopted according to the calculation results; On the heavy-duty area track foundation and the light-load area track foundation joint embedded steel plate, the buckle rail plate is used for disassembly and assembly.

In the specific example, the foundation of the beam-making area is pebble gravel, with a bearing capacity of 300kPa. Therefore, the track foundation in the heavy-load area and the foundation under the track foundation in the light-load area have been tamped. The tamping depth is 80cm, the density is 94%, and the bearing capacity of the foundation 320kPa, on which a 20cm notoginseng lime soil cushion is laid and compacted, with a bearing capacity of 300kPa. The foundation treatment meets the bearing capacity and Settlement requirements. The track foundation in the heavy-duty area is an integral reinforced concrete structure with a plane size of 34m×2.25m and a thickness of 400mm. The rail connection embedded parts in the track foundation are arranged at a spacing of 500mm, and the buckle rail plate is installed on it to connect with the rail. In the length direction of the track foundation in the heavy-duty area, two T-beam outer mold embedded parts are intermittently arranged. The embedded parts are welded by 12mm thick steel plate and Φ12mm threaded steel bar. The track foundation in the light load area is two separated reinforced concrete structures, the plane size of a single track is 34m×0.5m, and the thickness is 300mm. The rails and their joint embedded parts on the track foundation are the same as the track foundation in the heavy-duty area.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention.

Claims (7)

1. A rapid prefabricated T-beam production pedestal, characterized in that it includes a track foundation (1) in a heavy-load area and a track foundation (2) in a light-load area; The upper plane of the track foundation (1) in the heavy-duty area is rectangular, its length is greater than or equal to the length of the prefabricated T-beam, and its width is greater than the width of the top plate of the prefabricated T-beam; The track foundation (2) in the light-load area is located at the top of the track foundation (1) in the heavy-load area in the longitudinal direction, and its upper plane is rectangular, and its length is greater than or equal to the length of the prefabricated T-beam; The track foundation (1) in the heavy-load area and the track foundation (2) in the light-load area are respectively provided with two rows of rail connection embedded parts (3), and the rail connection embedded parts (3) are equipped with rails ( 4), the rails on the track foundation (1) in the heavy load area are continuously docked with the rails (4) on the track foundation (2) in the light load area; The track foundation (1) in the heavy-duty area is provided with T-beam outer mold embedded parts (5), and the T-beam outer mold embedded parts (5) are arranged on two rows of rail connecting embedded parts (3) outside of A lime-soil cushion (6) is laid under the track foundation (1) in the heavy-load area and the track foundation (2) in the light-load area. 2. The rapid prefabricated T-beam production pedestal according to claim 1, characterized in that, the track foundation (1) in the heavy-load area and the track foundation (2) in the light-load area are respectively reinforced concrete structures, and the heavy-load area The track foundation (1) in the area and the track foundation (2) in the light load area are connected as a whole through the steel rail (4). 3. The rapid prefabricated T-beam production pedestal according to claim 2, characterized in that the track foundation (1) in the heavy-duty area is an integral reinforced concrete structure, and the top surface is higher than the surrounding ground. 4. The rapid prefabricated T-beam production pedestal according to claim 3, characterized in that, the track foundation (2) in the light-load area is two parallel reinforced concrete structures, and the top surface and the track foundation in the heavy-load area ( 1) The top surface is flat. 5. The rapid prefabricated T-beam production pedestal according to any one of claims 1 to 4, characterized in that, the rail connection embedded part (3) includes a steel plate (8), and the lower part of the steel plate (8) A hook steel bar (7) is welded on the surface, and a buckle rail plate (9) is installed on the upper surface of the steel plate (8). 6. The rapid prefabricated T-beam production platform according to claim 5, characterized in that, the rail (4) is connected to the rail connecting embedded part (3) through a rail buckle plate (9). 7. The rapid prefabricated T-beam production pedestal according to any one of claims 1 to 4, characterized in that, the embedded part of the outer mold of the T-beam includes a steel plate (8), and the lower part of the steel plate (8) The surface is welded with a crotch steel bar (7).

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