Assembly type small box girder split formwork structure

Abstract

The utility model relates to an assembly type small box girder split formwork structure which comprises a bottom formwork, outer formworks and inner formworks, the number of the outer formworks is eight, every two outer formworks form a group, the two outer formworks in each group are distributed on the left side and the right side of the bottom formwork in a left-right symmetry mode, the number of the inner formworks is four, the inner formworks are located between the outer formworks in each group respectively, and the outer formworks and the inner formworks are arranged on the left side and the right side of the bottom formwork respectively. First dovetail tenons are fixedly installed on the left side and the right side of the bottom formwork, first dovetail grooves are formed in the sides, close to the bottom formwork, of the two outer formworks in each set, and the outer formworks are in positioning connection with the bottom plate through cooperation of the dovetail grooves and the dovetail tenons, so that the rigidity is improved; the front outer formwork and the rear outer formwork are connected with the front inner formwork and the rear inner formwork in a positioning and matching mode through the dovetail grooves and the dovetail tenons, modularized installation is achieved, the length can be increased or reduced according to the actual situation, more convenience is achieved, the connecting precision is high, and no construction gap exists.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to an assembled small box beam split template structure. Background Art

[0002] The small box girder is a precast concrete component commonly used in highway bridge projects, especially small and medium-span bridges. It has a unique box-section structure and consists of a top plate, a bottom plate, a web plate and cross diaphragms at both ends. It is made by tying steel bars in the prefabrication site, supporting internal and external formwork, pouring concrete, and then demolding and curing. Its manufacturing process is mature. Due to its box-type structure, the force distribution is reasonable, the top plate is compressed, the bottom plate is tensile, and the web plate is sheared. Under the action of vertical load, the mechanical properties of the material can be fully exerted. The deadweight is lighter than other beam types with the same span, which can reduce the burden on the lower structure and optimize the bridge design.

[0003] Traditional small box girder formwork often adopts an integral design. This type of formwork lacks flexibility when prefabricating small box girders with different length requirements, and is difficult to adjust conveniently to adapt to various length specifications in actual projects. Since it cannot be effectively spliced ​​and combined according to the actual length, during the formwork installation process, not only is the positioning operation complicated and difficult to ensure accuracy, it requires a lot of manpower and time for repeated calibration and fixation, and the assembly efficiency is low. In addition, the integral formwork is relatively inconvenient to transport and store, and has high requirements for site space, which increases transportation costs and site occupation costs. Utility Model Content

[0004] The purpose of the utility model is to provide an assembled small box beam split template structure to overcome the deficiencies in the above-mentioned prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A prefabricated small box girder split formwork structure includes a bottom formwork, an outer formwork and an inner formwork, wherein the number of the outer formworks is eight and they form a group of two, and the two outer formworks in each group are symmetrically distributed on the left and right sides of the bottom formwork, the number of the inner formworks is four and they are respectively located between each group of outer formworks, and the left and right sides of the bottom formwork are fixedly installed with a first dovetail tenon, and the side of each group of two outer formworks close to the bottom formwork is provided with a first dovetail groove, and the two outer formworks in each group are spliced ​​one-to-one with the first dovetail tenons on the left and right sides of the bottom formwork through the first dovetail groove, and the front and rear sides of each outer formwork are provided with a second dovetail groove, and the front and rear sides of each inner formwork are provided with a third dovetail groove, and the two outer formworks correspondingly arranged in the front and rear are spliced ​​by the second dovetail tenon and the second dovetail groove, and the two inner formworks correspondingly arranged in the front and rear are spliced ​​by the third dovetail tenon and the third dovetail groove.

[0007] The beneficial effects of the present invention are as follows: the outer formwork is positioned and connected to the base plate by the cooperation of the dovetail groove and the dovetail tenon, thereby increasing the rigidity; and the front and rear outer formworks and the front and rear inner formworks are also connected by the positioning cooperation of the dovetail groove and the dovetail tenon, and the modular installation can increase or decrease the length according to the actual situation, which is more convenient, and has high connection accuracy and no construction gaps.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, three support frames distributed in a linear array are fixedly installed on the outer sides of each group of two outer templates.

[0010] Furthermore, the number of the second dovetail grooves is several and evenly distributed on the front and rear sides of the eight outer templates.

[0011] Furthermore, the number of the third dovetail grooves is several and evenly distributed on the front and rear sides of the four inner templates.

[0012] Furthermore, a connecting plate is provided on the top of each group of the outer formworks, and each of the connecting plates is fixed to the top of the corresponding outer formworks by a first fastener, and each of the connecting plates is also fixed to the top of the corresponding inner formworks by a second fastener.

[0013] Furthermore, a load-bearing plate is provided at the top of the inner wall of each inner formwork, the bottom of the second fastener passes through the load-bearing plate and extends to the bottom of the load-bearing plate, and the bottom of the load-bearing plate is threadedly connected to a bolt whose top extends to the inside of the inner formwork. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection between the front and rear outer templates and the inner template of the utility model;

[0017] Figure 4 This is a schematic diagram of the connection between the connecting plate and the outer template of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection between the bolt and the inner template of the utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1. Bottom formwork; 2. Outer formwork; 3. Inner formwork; 4. First dovetail tenon; 5. First dovetail groove; 6. Second dovetail groove; 7. Third dovetail groove; 8. Second dovetail tenon; 9. Third dovetail tenon; 10. Support frame; 11. Connecting plate; 12. First fastener; 13. Second fastener; 14. Load-bearing plate; 15. Bolts. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] Example 1, as Figures 1 to 5 As shown, an assembled small box girder split formwork structure includes a bottom formwork 1, an outer formwork 2 and an inner formwork 3. The number of outer formworks 2 is eight and they are grouped in pairs. The two outer formworks 2 in each group are symmetrically distributed on the left and right sides of the bottom formwork 1. The number of inner formworks 3 is four and they are respectively located between each group of outer formworks 2. The left and right sides of the bottom formwork 1 are fixedly installed with a first dovetail tenon 4. The side of each group of two outer formworks 2 close to the bottom formwork 1 is provided with a first dovetail groove 5. The two outer formworks 2 in each group are spliced ​​one-to-one with the first dovetail tenons 4 on the left and right sides of the bottom formwork 1 through the first dovetail groove 5. The front and rear sides of each outer formwork 2 are provided with a second dovetail groove 6. The front and rear sides of each inner formwork 3 are provided with a third dovetail groove 7. The two outer formworks 2 corresponding to the front and rear are spliced ​​by the second dovetail tenon 8 and the second dovetail groove 6. The two inner formworks 3 corresponding to the front and rear are spliced ​​by the third dovetail tenon 9 and the third dovetail groove 7.

[0023] The outer formwork 2 on the left and right sides is installed with the bottom formwork 1 through the cooperation of the first dovetail tenon 4 and the first dovetail groove 5. The outer formwork 2 on the front and rear sides is spliced ​​and installed through the cooperation of the second dovetail groove 6 and the second dovetail tenon 8. The inner formwork 3 on the front and rear sides is spliced ​​and installed through the cooperation of the third dovetail groove 7 and the third dovetail tenon 9. (The number of outer formwork 2 and inner formwork 3 can be increased or decreased according to the actual situation on site to achieve better results).

[0024] Example 2: This example is a further improvement based on Example 1, and its details are as follows: three support frames 10 distributed in a linear array are fixedly installed on the outer sides of each group of two outer templates 2.

[0025] By providing a plurality of support frames 10 , the outer side of the outer formwork 2 can be better supported, ensuring that the position of the outer formwork 2 remains stable during the process of pouring concrete inside.

[0026] Example 3: This example is a further improvement based on Example 1, and its details are as follows: there are several second dovetail grooves 6 and they are evenly distributed on the front and back sides of the eight outer templates 2.

[0027] By providing a plurality of second dovetail grooves 6 , the front and rear outer formworks 2 can maintain better stability after being spliced, which facilitates subsequent concrete pouring.

[0028] Example 4: This example is a further improvement based on Example 1, and its details are as follows: there are several third dovetail grooves 7 and they are evenly distributed on the front and back sides of the four inner templates 3.

[0029] The provision of the plurality of third dovetail grooves 7 allows the plurality of inner templates 3 to maintain better stability after being connected.

[0030] Example 5. This example is a further improvement based on Example 1, and is specifically as follows: a connecting plate 11 is further provided on the top of each group of outer formwork 2, and each connecting plate 11 is fixed to the top of the corresponding outer formwork 2 by a first fastener 12, and each connecting plate 11 is also fixed to the top of the corresponding inner formwork 3 by a second fastener 13.

[0031] By providing the connecting plates 11, the stability of the left and right outer formworks 2 during use is further enhanced, and by being connected to the inner formworks 3, the inner formworks 3 will not sink or float during the pouring process.

[0032] Example 6. This example is a further improvement based on Example 5, and is specifically as follows: a load-bearing plate 14 is provided on the top of the inner wall of each inner formwork 3, the bottom of the second fastener 13 passes through the load-bearing plate 14 and extends to the bottom of the load-bearing plate 14, and the bottom of the load-bearing plate 14 is threadedly connected to a bolt 15 whose top extends to the inside of the inner formwork 3.

[0033] The load-bearing plate 14 is provided to disperse the force at the connection between the connecting plate 11 and the inner formwork 3 , and the bolts 15 are used to ensure the stability of the connection between the connecting plate 11 and the inner formwork 3 .

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An assembled small box beam split formwork structure, comprising a bottom formwork (1), an outer formwork (2) and an inner formwork (3), characterized in that: The number of the outer templates (2) is eight and they form a group of two. The two outer templates (2) in each group are symmetrically distributed on the left and right sides of the bottom template (1). The number of the inner templates (3) is four and they are respectively located between each group of outer templates (2). The left and right sides of the bottom template (1) are fixedly installed with a first dovetail tenon (4). The side of each group of two outer templates (2) close to the bottom template (1) is provided with a first dovetail groove (5). The two outer templates (2) in each group are connected to the bottom template (1) through the first dovetail groove (5). The first dovetail tenons (4) on the left and right sides of the template (1) are matched and spliced ​​one by one, the front and rear sides of each outer template (2) are provided with a second dovetail groove (6), the front and rear sides of each inner template (3) are provided with a third dovetail groove (7), the two outer templates (2) correspondingly arranged in the front and rear are matched and spliced ​​by the second dovetail tenon (8) and the second dovetail groove (6), and the two inner templates (3) correspondingly arranged in the front and rear are matched and spliced ​​by the third dovetail tenon (9) and the third dovetail groove (7).

2. The assembled small box beam split formwork structure according to claim 1, characterized in that: Three support frames (10) distributed in a linear array are fixedly mounted on the outer sides of each group of two outer templates (2).

3. The assembled small box beam split formwork structure according to claim 1 is characterized in that: The number of the second dovetail grooves (6) is several and they are evenly distributed on the front and rear sides of the eight outer templates (2).

4. The assembled small box beam split formwork structure according to claim 1, characterized in that: The number of the third dovetail grooves (7) is several and evenly distributed on the front and rear sides of the four inner templates (3).

5. The assembled small box beam split formwork structure according to claim 1, characterized in that: A connecting plate (11) is also provided on the top of each group of outer templates (2), and each connecting plate (11) is fixed to the top of the corresponding outer template (2) via a first fastener (12), and each connecting plate (11) is also fixed to the top of the corresponding inner template (3) via a second fastener (13).

6. The assembled small box beam split formwork structure according to claim 5, characterized in that: A bearing plate (14) is provided at the top of the inner wall of each inner template (3); the bottom of the second fastener (13) passes through the bearing plate (14) and extends to the bottom of the bearing plate (14); the bottom of the bearing plate (14) is connected to a bolt (15) whose top extends to the inside of the inner template (3) through a thread.

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