Corner-chipping-preventing and slurry-leakage-preventing end template for end part of prefabricated box girder

Abstract

The utility model discloses a prefabricated box girder end corner chipping and slurry leakage prevention end formwork which comprises an L-shaped plate, an end formwork body is installed at one end of the L-shaped plate through a connecting bolt, flange plate adjusting blocks are fixedly installed on the two sides of the end formwork body, and one end of the L-shaped plate is connected with a fixing screw. By means of the design of the round corners and the thick rubber strips, cement can fully flow in through the round corners in the cement pouring process, so that the strength of a concrete skirt can be improved, gaps can be blocked and sealed through the thick rubber strips by the side formworks of the end formworks in the cement pouring process, and therefore the strength of the concrete skirt can be improved. Therefore, the phenomenon that slurry leaks in splicing gaps of the end formworks due to the fact that the side formworks are not pulled tightly is avoided, and the appearance quality of the end of the formed box girder can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering construction in transportation, in particular to a prefabricated box beam end portion anti-corner collapse and slurry leakage end template. Background Art

[0002] The circular production line of prefabricated box girders for highways has realized the assembly, standardization, factory-based and intelligent production of prefabricated box girders. The formwork adopts a fixed hydraulic side formwork plus a self-propelled mobile bottom formwork pedestal. The self-propelled mobile bottom formwork pedestal is used to connect the pouring, curing, tensioning, grouting and other processes of prefabrication of the box girders, realizing assembly line operation with fixed workstations for each process.

[0003] However, the existing box beam is a post-tensioned prestressed simply supported box beam, which needs to be prestressed after the concrete pouring is completed and reaches the designed tensioning strength. Therefore, anchors for prestressing need to be reserved at both ends when pouring the box beam. At the same time, in order to avoid leaving traces of the joints between the new and old concrete on the web when pouring the concrete at both ends after the prestressing construction is completed, affecting the appearance of the box beam;

[0004] Due to the special structural dimensions of the box girder end, the conventional end formwork has a 16 cm length surrounded by the poured concrete and has a large internal angle, which can easily cause large-area corner collapse of the skirt when the formwork is removed; and the contact surface between the end formwork and the side formwork is an inclined surface of about 74°. If the side formwork is not pulled tightly during daily construction, it is easy to cause leakage at the contact position between the end formwork and the side formwork, resulting in "root rot". Therefore, a prefabricated box girder end formwork is proposed to prevent corner collapse and leakage. Utility Model Content

[0005] The utility model aims to provide a prefabricated box girder end formwork for preventing corner collapse and slurry leakage, so as to solve the problem in the above-mentioned background technology that when the formwork is removed, large-area corner collapse of the skirt and the loose tension of the side formwork are easily caused, which easily causes slurry leakage at the contact position between the end formwork and the side formwork, resulting in the "root rot" phenomenon.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The prefabricated box beam end anti-collapse and slurry leakage end template comprises: an L-shaped plate, one end of which is installed with the end template through connecting bolts, flange plate adjustment blocks are fixedly installed on both sides of the end template, and one end of the L-shaped plate is connected with a fixing screw.

[0008] Preferably, the end template and the L-shaped plate are spliced ​​into a U-shape, and the two corners of the upper end expand outward, and steel bundle reserved holes are opened on one side of the end template and the L-shaped plate, and are flush.

[0009] Preferably, a lifting lug is fixedly mounted on the upper end of the end template.

[0010] Preferably, the upper and lower parts of one side of the end template are provided with reserved holes for steel bars, and the reserved holes for steel bars at the lower end are connected together with the L-shaped plate.

[0011] Preferably, a guardrail slot is fixedly mounted on the upper end of the end template.

[0012] Preferably, the inner 90° angle of the end template is filled with a rounded corner, and the shrinkage at the lower armpit corner of the end template is an inclined surface with a high inside and a low outside and an inclination angle of 5°.

[0013] Preferably, a rubber strip with a fixed thickness of mm is added at the contact surface between the end mold plate and the side mold plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Through the design of fillets and bevels, the angles can be filled and polished into fillets in the fixture of the end template using tools such as solder and angle grinders. The rounded corner design improves the low strength of the concrete skirt caused by the inability to fill the concrete coarse aggregate and only cement slurry pouring in due to the small space at the angle, thereby avoiding the phenomenon of corner collapse at the edge of the skirt;

[0016] By setting an inclined surface with a 5° angle of inward high and outward low at the lower armpit corner of the end formwork, and polishing it flat before use, the formwork can be smoothly removed after the concrete is formed, thereby effectively avoiding the phenomenon of corner collapse at the lower armpit corner of the skirt, making this end formwork smoother during disassembly, and significantly improving the appearance quality of the formed box girder end, and should be promoted and applied to box girder prefabrication construction.

[0017] 2. Through the design of thick rubber strips, a 5mm thick rubber strip is glued to the contact position between the end formwork and the side formwork with strong glue before the end formwork is installed, avoiding the leakage of slurry in the joint gap of the end formwork caused by the side formwork not being pulled tight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the front side of the end template of the present utility model;

[0019] Figure 2 It is a schematic diagram of the side structure of the end template of the utility model;

[0020] Figure 3 It is a schematic diagram of the top surface structure of the end template of the utility model.

[0021] In the figure: 1. rounded corners; 2. inclined surface; 3. thick rubber strip; 4. lifting ear; 5. fixing screw; 6. guardrail slot; 7. flange plate adjustment block; 8. reserved holes for steel bundles; 9. connecting bolts; 10. reserved holes for steel bars; 11. L-shaped plate; 12. end formwork. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 , this embodiment provides the following technical solutions:

[0024] like Figure 1-Figure 3 As shown, the anti-collapse angle and slurry leakage end template of the prefabricated box girder end comprises: an L-shaped plate 11, an end template 12 is installed at one end of the L-shaped plate 11 through a connecting bolt 9, flange plate adjustment blocks 7 are fixedly installed on both sides of the end template 12, a fixing screw 5 is connected to one end of the L-shaped plate 11, the end template 12 and the L-shaped plate 11 are spliced ​​into a U shape, and the two corners of the upper end expand outward, the end template 12 and the L-shaped plate 11 are provided with steel beam reserved holes 8 on one side, and are flush, the upper end of the end template 12 is fixedly installed with a lifting ear 4, the upper and lower parts of one side of the end template 12 are provided with steel bar reserved holes 10, and the steel bar reserved holes 10 at the lower end are connected with the L-shaped plate 11, and the upper end of the end template 12 is fixedly installed with a guardrail slot 6, the inner 90° angle of the end template 12 is filled with a fillet 1, and the shrinkage of the lower armpit angle of the end template 12 is high inside and low outside, and has an inclined surface 2 with an inclination angle of 5°.

[0025] Through the design of the fillet 1 and the bevel 2, the angle can be filled and ground into the fillet 1 by using tools such as solder and angle grinder in the fixture of the end template 12. The design of the fillet 1 improves the problem of low strength of the concrete skirt caused by the inability to fill the concrete coarse aggregate and only cement slurry pouring in due to the small space at the angle, thereby avoiding the phenomenon of corner collapse at the edge of the skirt.

[0026] By setting an inclined surface with a high inside and a low outside and an inclination angle of 5° at the lower armpit corner of the end template 12, and polishing it flat before using the template, the template can be smoothly removed after the concrete is formed, thereby effectively avoiding the phenomenon of corner collapse at the lower armpit corner of the skirt, making this end template smoother during disassembly, and significantly improving the appearance quality of the formed box beam end, which should be promoted and applied to box beam prefabrication construction.

[0027] like Figure 1-Figure 3 As shown, a 5 mm thick rubber strip 3 is added and fixed at the contact surface between the end mold plate 12 and the side mold plate.

[0028] Through the design of the thick rubber strip 3, a 5 mm thick rubber strip 3 is adhered to the contact position between the end template 12 and the side template with strong glue before the end template 12 is installed, thereby avoiding the phenomenon of leakage of slurry between the joint gaps of the end template 12 caused by the side template not being pulled tight.

[0029] According to the above technical scheme, the working steps of this scheme are summarized and sorted out: before use, tools such as solder and angle grinder can be used to fill and grind the angle in the end template 12 into a fillet 1, and then a 5mm thick rubber strip 3 can be glued to the contact position between the end template 12 and the side template with strong glue, and then it can be buckled and installed on the end of the prefabricated box girder, so that it can pass through the fillet 1 during the pouring of cement, and the cement can be fully poured in. In the process of pouring cement, the side template of the end template 12 can be sealed by the thick rubber strip 3 to fill the gap, which can significantly improve the appearance quality of the formed box girder end.

[0030] In summary: during the process of pouring cement, the rounded corners can be used for cement to fully flow in, so as to increase the strength of the concrete skirt. In the process of pouring cement, the side forms of the end formwork 12 can be sealed by thick rubber strips to plug the gaps, thereby avoiding the leakage of cement between the joints of the end formwork caused by the side forms not being pulled tight, and the appearance quality of the formed box girder end can be significantly improved.

[0031] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. Prefabricated box beam end anti-collapse corner and grout leakage end formwork, characterized in that: include: An L-shaped plate (11), one end of the L-shaped plate (11) is mounted with an end template (12) via a connecting bolt (9), flange plate adjustment blocks (7) are fixedly mounted on both sides of the end template (12), and one end of the L-shaped plate (11) is connected with a fixing screw (5).

2. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 1 is characterized in that: The end template (12) and the L-shaped plate (11) are both spliced ​​into a U-shape, and the two corners of the upper end expand outwards. One side of the end template (12) and the L-shaped plate (11) are both provided with steel bundle reserved holes (8) and are flush.

3. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 2 is characterized in that: A lifting lug (4) is fixedly mounted on the upper end of the end template (12).

4. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 3 is characterized in that: The upper and lower parts of one side of the end template (12) are both provided with steel bar reserved holes (10), and the steel bar reserved holes (10) at the lower end are connected together with the L-shaped plate (11).

5. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 4 is characterized in that: A guardrail slot (6) is fixedly mounted on the upper end of the end template (12).

6. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 5, characterized in that: The inner 90° included angle of the end template (12) is filled with a rounded corner (1), and the constricted portion of the lower armpit corner of the end template (12) is an inclined surface (2) that is higher inside and lower outside and has an inclination angle of 5°.

7. The prefabricated box girder end anti-collapse corner and grout leakage end formwork according to claim 6 is characterized in that: A 5 mm thick rubber strip (3) is added and fixed at the contact surface between the end mold plate (12) and the side mold plate.

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