End sealing device for end sealing construction of pre-tensioning prefabricated hollow slab

Abstract

The utility model discloses an end sealing device for end sealing construction of a pre-tensioning prefabricated hollow slab, which comprises an inner template, an outer template and a connecting rod, the inner template and the outer template are connected through the connecting rod, the inner template is mounted in a hole of the prefabricated hollow slab in an inserting manner, and the outer template is mounted in the hole of the prefabricated hollow slab in an inserting manner. The inner wall face of the outer formwork is attached to the end face of the prefabricated hollow slab so that a hole of the prefabricated hollow slab can be sealed in the axial direction. The utility model provides the end sealing device for the end sealing construction of the pre-tensioning prefabricated hollow slab, and through the end sealing device, the time required by end sealing construction formwork erecting is effectively shortened, the workload of formwork erecting is reduced, and meanwhile, the construction quality can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction and relates to a sealing device for the end sealing construction of pretensioned precast hollow slabs. Background Technique

[0002] The pretensioned precast hollow slab is a manufacturing method of prestressed concrete components. In the manufacturing process of the components, prestress is applied first, and then concrete is poured. This method is usually used to manufacture components with high load-bearing capacity and long span, such as beam slabs and floor slabs of bridges. The end sealing construction of precast hollow slabs is an important link in the actual construction process of precast hollow slabs. It not only relates to the integrity and stability of the structure, but also involves the later service performance and durability. The end sealing construction of precast hollow slabs refers to using concrete to seal both ends of the precast hollow slabs. The purpose of doing this is to increase the shear resistance and also play a role in water blocking. The specific method of common end sealing construction is to build templates in the ducts at both ends of the precast beam slab, and then pour end sealing concrete. Most of the existing end sealing construction templates are masonry inner templates, that is, templates made by on-site masonry with bricks. This form of template may collapse during the process of pouring end sealing concrete. At the same time, the construction is more difficult, and it is difficult to control the perpendicularity of the template, which leads to the difficulty in ensuring the overall construction quality and the complexity of the construction steps, resulting in an increase in construction costs.

[0003] To solve the above problems, a prefabricated formwork device for end sealing construction is needed to improve the construction quality and reduce the construction cost. Content of the Utility Model

[0004] In view of this, the utility model provides a sealing device for the end sealing construction of pretensioned precast hollow slabs. By setting the sealing device, the time required for formwork support in end sealing construction is effectively shortened, the workload of formwork support is reduced, and the construction quality can be improved at the same time.

[0005] The utility model discloses a sealing device for the end sealing construction of pretensioned precast hollow slabs, which includes an inner template, an outer template and a connecting rod. The inner template and the outer template are connected by the connecting rod. The inner template is installed in the hole of the precast hollow slab in an inserted manner, and the inner wall surface of the outer template is attached to the end surface of the precast hollow slab so that the hole of the precast hollow slab is axially closed.

[0006] Further, the sealing device further includes an inner support sleeve, the inner support sleeve is sleeved outside the connecting rod, and the inner support sleeve is arranged at the position between the inner template and the outer template.

[0007] Further, the inner template is provided with a mounting seat, and the connecting rod is detachably installed on the inner template through the mounting seat.

[0008] Furthermore, the end-sealing device further includes a locking member. One end of the connecting rod is connected to the inner formwork, and the other end passes through the outer formwork. The locking member is installed on the connecting rod and abuts against the outer wall surface of the outer formwork. The locking member presses and fixes the outer formwork against the end face of the precast hollow slab.

[0009] Furthermore, the inner formwork is precast from concrete and is adapted to the holes of the precast hollow slab. The mounting seat is fixedly installed on the inner formwork by means of embedding; the outer formwork is a steel formwork.

[0010] Furthermore, both ends of the connecting rod are provided with threads, and the connecting rod is respectively connected to the mounting seat and the locking member by means of threaded connection.

[0011] Furthermore, a plurality of connecting rods are provided, and the plurality of connecting rods are evenly distributed on the end face of the inner formwork in the axial direction.

[0012] Advantages of the present utility model:

[0013] The present utility model discloses an end-sealing device for end-sealing construction of a pre-tensioned precast hollow slab. By providing the end-sealing device, the time required for formwork support in end-sealing construction is effectively shortened, the workload of formwork support is reduced, and the construction quality can be improved at the same time.

[0014] Among them, the inner formwork made of precast concrete slabs is used to replace the traditional brick formwork, which can ensure that the end-sealing concrete does not collapse during pouring. In addition to being used as the inner formwork, the precast concrete slabs can also be used as a part of the end-sealing concrete, reducing the measure cost; the connecting rod, the outer formwork and the locking member can be reused after construction, reducing the one-time investment and lowering the construction cost. Description of the drawings

[0015] Figure 1 is a structural schematic diagram after pouring of the present utility model;

[0016] Figure 2 is a cross-sectional view of the end-sealing device of the present utility model;

[0017] Figure 3 is an isometric view of the present utility model. Detailed implementation manners

[0018] It should be noted that in the description of this specification, the orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the present utility model, the axial direction is along the axis direction of the precast hollow slab. The inner wall surface of the outer formwork is the side facing the hollow slab, and the outer side is the opposite. This is understandable to those skilled in the art and will not be elaborated here.

[0019] Next, the end sealing device of the present utility model will be further elaborated in combination with the method of end sealing construction of the pre-tensioned precast hollow slab.

[0020] The method of end sealing construction of the pre-tensioned precast hollow slab specifically includes the following steps:

[0021] S1. Fabricate an end sealing device according to the hole size of the precast hollow slab 10.

[0022] The end sealing device in this embodiment includes an inner formwork 1, an outer formwork 7 and a connecting rod 2. The inner formwork 1 and the outer formwork 7 are connected by the connecting rod 2. Among them, the inner formwork 1 is precast with concrete and is adapted to the holes of the precast hollow slab 10. Using the precast concrete slab as the inner formwork 1 instead of the traditional brick formwork can ensure that the end sealing concrete does not collapse during pouring. In addition to being used as the inner form, the precast concrete slab can also be used as a part of the end sealing concrete, reducing the measure cost; the outer formwork 7 is a steel formwork, and steel has the advantages of wear resistance, corrosion resistance and reusability, thereby reducing the construction cost. The inner formwork 1 is installed in the holes of the precast hollow slab 10 in an inserted manner, and the inner wall surface of the outer formwork 7 fits against the end face of the precast hollow slab 10 so that the holes of the precast hollow slab 10 are axially closed, that is, the openings of the holes of the precast hollow slab 10 are closed to ensure that the concrete does not overflow during pouring. When in use, the inner formwork 1 and the outer formwork 7 are both prefabricated in advance and can be directly used after assembly, effectively simplifying the construction steps and reducing the construction cost. Compared with the in-situ masonry inner formwork, the precast formwork is superior to the masonry inner formwork in terms of verticality and the degree of fit with the holes of the precast hollow slab 10. Moreover, when using the end sealing device of the present utility model, there is no need to spend time waiting for the masonry inner formwork to solidify and form, effectively reducing the construction time and greatly improving the construction efficiency.

[0023] The end-capping device of this embodiment further includes an inner support sleeve 3. The inner support sleeve 3 is sleeved outside the connecting rod 2, and the inner support sleeve is arranged at the position between the inner formwork 1 and the outer formwork 7. The inner support sleeve 3 in this embodiment is a steel pipe support. After the end-capping device is assembled, the two axial ends of the inner support sleeve 3 respectively abut against the inner formwork 1 and the outer formwork 7. The setting of the inner support sleeve 3, firstly, protects the connecting rod 2, so that the connecting rod 2 can be easily withdrawn after the end-capping concrete is poured; secondly, it controls the distance between the inner formwork 1 and the outer formwork 7, thereby ensuring the cross-sectional size of the end-capping concrete and further improving the construction quality; thirdly, after the construction is completed, the inner support sleeve 3 remaining in the concrete is equivalent to increasing the number of structural reinforcements at this position, further enhancing the shear resistance.

[0024] In this embodiment, the inner formwork 1 is provided with a mounting seat 8, and the connecting rod 2 is detachably mounted on the inner formwork 1 through the mounting seat 8. The mounting seat 8 is fixedly installed on the inner formwork 1 by embedding, so that the mounting seat 8 and the inner formwork 1 form an integral body, with higher structural strength and more reliable connection.

[0025] In this embodiment, the end-capping device further includes a locking member. One end of the connecting rod 2 is connected to the inner formwork 1, and the other end passes through the outer formwork 7. The locking member is installed on the connecting rod 2 and abuts against the outer wall surface of the outer formwork 7. The locking member tightly fixes the outer formwork 7 to the end face of the precast hollow slab 10. The setting of the locking member, firstly, locks and positions the outer formwork 7, and secondly, prevents the outer formwork 7 from bursting during concrete pouring, affecting the construction quality. In this embodiment, both ends of the connecting rod 2 are provided with threads, and the connecting rod 2 is respectively connected to the mounting seat 8 and the locking member by means of threaded connection. In this embodiment, the mounting seat 8 is a pre-embedded nut, and the locking member is composed of a cushion block 6, a gasket 5 and a conventional nut 4. The cushion block 6, the gasket 5 and the conventional nut 4 are arranged in sequence from the inside out, and two or more conventional nuts 4 are provided to prevent loosening during construction, resulting in concrete leakage or formwork bursting.

[0026] S2. A pouring hole 9 is opened at the top surface position of the end of the precast hollow slab 10 to be end-capped; as shown in the figure, after the end-capping device is installed in place in this embodiment, a pouring space for end-capping is formed between the inner formwork 1 and the outer formwork 7. A through hole is opened from top to bottom at the end of the hollow slab 10 to communicate with the pouring space, and then the end-capping concrete is poured and vibrated. And opening the hole from top to bottom is more conducive to the progress of concrete pouring. The pouring hole 9 in this embodiment is opened at the end, that is, at the orifice position of the hole of the hollow slab 10. Opening the hole at this position will not damage the integrity of the hollow slab 10, making the overall structural strength higher after pouring.

[0027] S3, Insert the end-capping device into the hole of the precast hollow slab 10;

[0028] S4, Pour end-capping concrete into the end of the precast hollow slab 10 through the pouring hole 9;

[0029] S5, After the concrete solidifies, remove the end-capping device. When removing, only need to remove the locking parts, the outer formwork 7 and the connecting rod 2 in sequence. The inner formwork 1 will become part of the end-capping concrete after pouring, and the inner support sleeve 3 can be used as a reinforcing bar to increase the structural strength and shear resistance. After the concrete is poured, it is necessary to cure the concrete.

[0030] In this embodiment, four connecting rods are provided, and they can also be adjusted according to the specific size of the rear formwork. Corresponding mounting seats and locking parts are also provided with four. The four connecting rods are symmetrically arranged to ensure balanced force and avoid the occurrence of formwork explosion accidents.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limitations. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slabs, characterized in that: It includes an inner template, an outer template and a connecting rod, the inner template and the outer template are connected by the connecting rod, the inner template is installed in the hole of the prefabricated hollow plate in an inserted manner, and the inner wall surface of the outer template is attached to the end surface of the prefabricated hollow plate so that the hole of the prefabricated hollow plate is closed in the axial direction.

2. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 1, characterized in that: The end-sealing device further comprises an inner support sleeve, the inner support sleeve is externally mounted on the connecting rod, and the inner support sleeve rod is arranged at a position between the inner template and the outer template.

3. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 1, characterized in that: The inner template is provided with a mounting seat, and the connecting rod is detachably mounted on the inner template through the mounting seat.

4. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 3, characterized in that: The end sealing device also includes a locking piece. One end of the connecting rod is connected to the inner template, and the other end passes through the outer template. The locking piece is installed on the connecting rod and fits against the outer wall surface of the outer template. The locking piece presses the outer template against the end surface of the prefabricated hollow plate.

5. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 3, characterized in that: The inner template is prefabricated with concrete, and the inner template is conformable to the holes of the prefabricated hollow slab. The mounting seat is fixedly mounted on the inner template by pre-embedded means; the outer template is a steel template.

6. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 4, characterized in that: Both ends of the connecting rod are provided with threads, and the connecting rod is connected with the mounting seat and the locking member respectively and correspondingly by means of threaded connection.

7. The end-sealing device for end-sealing construction of pre-tensioned prefabricated hollow slab according to claim 1, characterized in that: A plurality of connecting rods are provided, and the plurality of connecting rods are evenly distributed on the axial end surface of the inner template.

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