Prefabricated pedestal suitable for various types of railway prestressed concrete box girders

Abstract

The utility model discloses a prefabricated pedestal suitable for various types of railway prestressed concrete box girders, which comprises two first side mold strip bases, a second side mold strip base and an expanded foundation, and three bearing convex piers with identical structures are arranged on the expanded foundation at intervals; an embedded part is arranged on the enlarged foundation, and the side formwork strip bases, the embedded part on the enlarged foundation, the bearing convex pier and the outer side box girder supporting frame jointly support an outer side box girder formwork and a bottom formwork of the railway prestressed concrete box girder. The utility model has the characteristic of adapting to various types of railway prestressed concrete box girders, and can fix the outside box girder template and the bottom template at different positions through the combination of the plurality of groups of embedded parts, the bearing convex piers and the plurality of groups of side template strip bases, so as to adapt to various types of railway prestressed concrete box girders. The utility model has the advantages that the universality of the pedestal and the utilization rate of temporary land can be improved, the project construction cost is reduced, and the beam manufacturing efficiency is increased.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a precast platform that is adaptable to various beam types of prestressed concrete box girders for railways. Background Technology

[0002] The precast construction of railway prestressed concrete box girders generally uses concrete platforms. Currently, one platform can only be matched with one type of box girder. Although this method is feasible, it has some problems: 1. The versatility of various box girder lengths and types is poor. If there are multiple beam lengths and types, a wide variety of platforms are required, resulting in low utilization and poor economy, which is not conducive to the construction of large-scale precast box girder bodies. 2. After the box girder of one type is completed, the corresponding platform is idle and needs to be removed and remade to accommodate the storage of box girders of other types. Moreover, the platform construction time is long and cannot meet the needs of rapid construction. Summary of the Invention

[0003] The purpose of this utility model is to provide a prefabrication platform that can adapt to various beam types of railway prestressed concrete box girders. By setting side formwork bases and embedded parts with different lateral distances, railway prestressed concrete box girders of different beam types can be prefabricated, which improves the versatility of the platform, saves construction costs, and reduces temporary land use costs.

[0004] The purpose of this utility model is achieved as follows:

[0005] A precast platform adaptable to various beam types of prestressed concrete box girders for railways, characterized by: two first side formwork bases, one second side formwork base, and an enlarged foundation; compacted soil layers are laid on the ground to the left and right of the enlarged foundation; a first side formwork base symmetrical about the centerline of the enlarged foundation is provided in each of the compacted soil layers on the left and right sides of the enlarged foundation; a second side formwork base is provided in the compacted soil layer between the first side formwork base on the left and the enlarged foundation; and a first load-bearing pier, a second load-bearing pier, and a third load-bearing pier with identical structures are spaced apart on the enlarged foundation. Piers; on the enlarged foundation, a row of several pre-embedded parts with their upper ends exposed on the upper surface of the enlarged foundation are provided on the left side of the first load-bearing pier, between the second and third load-bearing piers, and on the right side of the third load-bearing pier; on both sides of the railway prestressed concrete box girder, there are outer box girder formwork with the same shape as the side wall of the railway prestressed concrete box girder. The outer box girder formwork on both sides of the railway prestressed concrete box girder is supported by the outer box girder support frame on both sides. The outer box girder formwork on both sides of the railway prestressed concrete box girder together with the bottom formwork constitutes the formwork of the precast railway prestressed concrete box girder.

[0006] Furthermore, horizontal bottom formwork for supporting the bottom of the railway prestressed concrete box girder is placed on top of both the first and second load-bearing piers. Outer box girder formwork with the same shape as the sidewalls of the railway prestressed concrete box girder is provided on both sides of the box girder. The bottom formwork and the outer box girder formwork on both sides of the railway prestressed concrete box girder together constitute the formwork for the precast railway prestressed concrete box girder. The two horizontal bottom ends of the left outer box girder support frame are respectively supported on the second side formwork base and the embedded parts on the left side of the first load-bearing pier on the enlarged foundation. The top of the left outer box girder support frame supports the left outer box girder formwork. The two horizontal bottom ends of the right outer box girder support frame are respectively supported on the embedded parts on the left and right sides of the third load-bearing pier on the enlarged foundation. The top of the right outer box girder support frame supports the right outer box girder formwork.

[0007] Furthermore, horizontal bottom formwork for supporting the bottom of the railway prestressed concrete box girder is placed on top of the first, second, and third load-bearing piers. Outer box girder formwork with the same shape as the sidewalls of the railway prestressed concrete box girder is provided on both sides of the box girder. The bottom formwork, together with the outer box girder formwork on both sides of the railway prestressed concrete box girder, constitutes the formwork for the precast railway prestressed concrete box girder. The two horizontal bottom ends of the left outer box girder support frame are respectively supported on the first side formwork base on the left and the embedded part on the left side of the first load-bearing pier on the enlarged foundation. The top of the left outer box girder support frame supports the left outer box girder formwork. The two horizontal bottom ends of the right outer box girder support frame are respectively supported on the first side formwork base on the right and the embedded part on the right side of the third load-bearing pier on the enlarged foundation. The top of the right outer box girder support frame supports the right outer box girder formwork.

[0008] Furthermore, a concrete cushion layer is provided at the bottom of the enlarged foundation.

[0009] Furthermore, the upper surfaces of the first side formwork base, the second side formwork base, the enlarged foundation, and the compacted soil layer are all on the same horizontal plane.

[0010] Furthermore, the first side formwork base, the second side formwork base, the enlarged foundation, the first load-bearing pier, the second load-bearing pier, and the third load-bearing pier are all arranged longitudinally along the same length, parallel to each other in the longitudinal direction.

[0011] Furthermore, the three rows of embedded parts on the enlarged foundation are arranged asymmetrically, and several embedded parts in each row on the enlarged foundation are arranged at equal intervals.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses a compacted soil layer and a concrete cushion layer at the bottom of the precast concrete platform. This not only meets the load-bearing capacity requirements for storing prestressed concrete box girders for railways, but also simplifies construction, shortens the construction period, reduces project construction costs, and improves economic benefits.

[0014] 2. This utility model is equipped with three rows of embedded parts, three load-bearing piers, and three side formwork bases. Through the combination of these embedded parts, load-bearing piers, and side formwork bases, the outer box girder formwork and the bottom formwork can be fixed in different positions. When prefabricating railway prestressed concrete box girders of different beam types, workers can select different combinations of side formwork bases, load-bearing piers, and embedded parts to fix the box girder side formwork support composed of the outer box girder formwork and the bottom formwork. This allows the prefabrication platform to adapt to the prefabrication of railway prestressed concrete box girders of different beam types, thereby achieving the purpose of storing railway prestressed concrete box girders of different beam types, improving the overall utilization rate of temporary land, reducing the cost of temporary land, and lowering construction costs.

[0015] 3. This utility model can replace the traditional concrete beam storage platform, improve the versatility of the platform, ensure the load-bearing capacity requirements of high-speed railway box girder prefabrication, and increase beam manufacturing efficiency. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the first type of beam according to this utility model;

[0017] Figure 2 for Figure 1 Top view after rotating 90 degrees along the AA direction (railway prestressed concrete box girder, outer box girder formwork and outer box girder support frame are not shown);

[0018] Figure 3 This is a front view schematic diagram of the second type of beam according to this utility model;

[0019] The following are the labeling elements in the diagram: 1. First side formwork base; 2. Compacted soil layer; 3. Concrete cushion layer; 4. Second side formwork base; 5. Railway prestressed concrete box girder; 6. Outer box girder formwork; 7. Spread foundation; 8. First load-bearing pier; 9. Second load-bearing pier; 10. Third load-bearing pier; 11. Outer box girder support frame; 12. Bottom formwork; 13. Embedded parts. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1: Fabricating a narrow beam

[0022] A precast platform adaptable to various beam types of prestressed concrete box girders for railways includes two first side formwork bases 1, one second side formwork base 4, and an enlarged foundation 7. Compacted soil layers 2 are laid on the ground to the left and right of the enlarged foundation 7. A first side formwork base 1 symmetrical about the centerline of the enlarged foundation 7 is located in each of the compacted soil layers 2 on the left and right sides of the enlarged foundation 7. A second side formwork base 4 is located in the compacted soil layer 2 between the first side formwork base 1 on the left and the enlarged foundation 7, close to the first side formwork base 1. A first load-bearing pier 8, a second load-bearing pier 9, and a third load-bearing pier 10 with identical structures are spaced apart on the enlarged foundation 7. A row of several embedded parts 13, with their upper ends protruding from the upper surface of the enlarged foundation 7, are located on the enlarged foundation 7, to the left of the first load-bearing pier 8, between the second and third load-bearing piers 9 and 10, and to the right of the third load-bearing pier 10. Both the heavy-duty pier 8 and the second load-bearing pier 9 are topped with horizontal bottom formwork 12 for supporting the bottom of the railway prestressed concrete box girder 5. On both sides of the railway prestressed concrete box girder 5, there are outer box girder formwork 6 with the same shape as the side wall of the railway prestressed concrete box girder 5. The bottom formwork 12 and the outer box girder formwork 6 on both sides of the railway prestressed concrete box girder 5 together constitute the formwork of the precast railway prestressed concrete box girder. The two horizontal bottom ends of the left outer box girder support frame 11 are respectively supported on the second side formwork base 4 and the embedded parts 13 on the left side of the first load-bearing pier 8 located on the enlarged foundation 7. The top of the left outer box girder support frame 11 supports the left outer box girder formwork 6. The two horizontal bottom ends of the right outer box girder support frame 11 are respectively supported on the embedded parts 13 on the left and right sides of the third load-bearing pier 10 on the enlarged foundation 7. The top of the right outer box girder support frame 11 supports the right outer box girder formwork 6.

[0023] A concrete cushion layer 3 is provided at the bottom of the enlarged foundation 7.

[0024] The upper surfaces of the first side formwork base 1, the second side formwork base 4, the enlarged foundation 7, and the compacted soil layer 2 are all on the same horizontal plane.

[0025] The first side formwork base 1, the second side formwork base 4, the enlarged foundation 7, the first load-bearing protrusion 8, the second load-bearing protrusion 9, and the third load-bearing protrusion 10 are all arranged longitudinally, parallel to each other in the longitudinal direction and of the same length.

[0026] The three rows of embedded parts 13 on the enlarged foundation 7 are arranged asymmetrically, and several embedded parts 13 in each row on the enlarged foundation 7 are arranged at equal intervals.

[0027] Example 2: Fabricating a wider beam

[0028] The structure of Example 2 is basically the same as that of Example 1, except that:

[0029] A horizontal bottom formwork 12 for supporting the bottom of the railway prestressed concrete box girder 5 is placed on the first load-bearing pier 8, the second load-bearing pier 9, and the third load-bearing pier 10. On both sides of the railway prestressed concrete box girder 5, there are outer box girder formwork 6 with the same shape as the side wall of the railway prestressed concrete box girder 5. The bottom formwork 12 and the outer box girder formwork 6 on both sides of the railway prestressed concrete box girder 5 together constitute the formwork of the precast railway prestressed concrete box girder. The two horizontal bottom ends of the outer box girder support frame 11 on the left are respectively supported on the first side formwork base 1 on the left and the embedded part 13 on the left side of the first load-bearing pier 8 located on the enlarged foundation 7. The top of the outer box girder support frame 11 on the left supports the outer box girder formwork 6 on the left. The two horizontal bottom ends of the outer box girder support frame 11 on the right are respectively supported on the first side formwork base 1 on the right and the embedded part 13 on the right side of the third load-bearing pier 10 on the enlarged foundation 7. The top of the outer box girder support frame 11 on the right supports the outer box girder formwork 6 on the right.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precast platform adaptable to various beam types of prestressed concrete box girders for railways, characterized in that: The structure includes two first side formwork bases, one second side formwork base, and one enlarged foundation. Compacted soil layers are laid on the ground to the left and right of the enlarged foundation. A first side formwork base, symmetrical about the centerline of the enlarged foundation, is located in each of the compacted soil layers on the left and right sides of the enlarged foundation. A second side formwork base is located in the compacted soil layer between the first side formwork base on the left and the enlarged foundation. Identical first, second, and third load-bearing piers are spaced apart on top of the enlarged foundation. On the enlarged foundation, the first load-bearing pier… On the left side of the pier, between the second and third load-bearing piers, and on the right side of the third load-bearing pier, there is a row of several embedded parts with their upper ends exposed on the upper surface of the enlarged foundation. On both sides of the railway prestressed concrete box girder, there are outer box girder formwork with the same shape as the side wall of the railway prestressed concrete box girder. The outer box girder formwork on both sides of the railway prestressed concrete box girder is supported by the outer box girder support frame on both sides. The outer box girder formwork on both sides of the railway prestressed concrete box girder together with the bottom formwork constitutes the formwork of the precast railway prestressed concrete box girder.

2. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: On top of both the first and second load-bearing piers, horizontal bottom formwork is placed to support the bottom of the railway prestressed concrete box girder. On both sides of the railway prestressed concrete box girder, there are outer box girder formwork with the same shape as the side wall of the railway prestressed concrete box girder. The bottom formwork and the outer box girder formwork on both sides of the railway prestressed concrete box girder together constitute the formwork of the precast railway prestressed concrete box girder. The two horizontal bottom ends of the left outer box girder support frame are respectively supported on the second side formwork base and the embedded parts on the left side of the first load-bearing pier on the enlarged foundation. The top of the left outer box girder support frame supports the left outer box girder formwork. The two horizontal bottom ends of the right outer box girder support frame are respectively supported on the embedded parts on the left and right sides of the third load-bearing pier on the enlarged foundation. The top of the right outer box girder support frame supports the right outer box girder formwork.

3. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: A horizontal bottom formwork for supporting the bottom of the railway prestressed concrete box girder is placed on top of the first, second, and third load-bearing piers. Outer box girder formwork with the same shape as the sidewalls of the railway prestressed concrete box girder is provided on both sides of the box girder. The bottom formwork and the outer box girder formwork on both sides of the railway prestressed concrete box girder together constitute the formwork for the precast railway prestressed concrete box girder. The two horizontal bottom ends of the left outer box girder support frame are respectively supported on the first side formwork base on the left and on the embedded part on the left side of the first load-bearing pier on the enlarged foundation. The top of the left outer box girder support frame supports the left outer box girder formwork. The two horizontal bottom ends of the right outer box girder support frame are respectively supported on the first side formwork base on the right and on the embedded part on the right side of the third load-bearing pier on the enlarged foundation. The top of the right outer box girder support frame supports the right outer box girder formwork.

4. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: A concrete pad is provided at the bottom of the enlarged foundation.

5. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: The upper surfaces of the first side formwork base, the second side formwork base, the enlarged foundation, and the compacted soil layer are all on the same horizontal plane.

6. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: The first side formwork base, the second side formwork base, the enlarged foundation, the first load-bearing pier, the second load-bearing pier, and the third load-bearing pier are all arranged longitudinally along the same length, parallel to each other in the longitudinal direction.

7. The precast platform for adapting to various beam types of prestressed concrete box girders for railways according to claim 1, characterized in that: The three rows of embedded parts on the enlarged foundation are arranged asymmetrically, and several embedded parts in each row on the enlarged foundation are arranged at equal intervals.

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