CN218928138U

CN218928138U - Pore-forming device of prestressed duct and prefabricated T beam

Info

Publication number: CN218928138U
Application number: CN202223171692.5U
Authority: CN
Inventors: 沈泽明; 李振铎; 阮兴华; 李�瑞; 王小寒; 许春山
Original assignee: China Construction Second Engineering Bureau Co Ltd
Current assignee: China Construction Second Engineering Bureau Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-28
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a pore-forming device of a prestressed pore canal and a prefabricated T beam, wherein the pore-forming device of the prestressed pore canal comprises a drawing piece, and the drawing piece is arranged in a die of the prefabricated T beam through a positioning steel bar; the drawing piece is a flexible hollow pipe fitting, and steel strands are arranged in the drawing piece; the number of the positioning steel bars is multiple, and the positioning steel bars are arranged at intervals along the length direction of the prefabricated T beam so as to fix the installation set positions of the drawing piece; the drawer is made of rubber material. The pore-forming device for the prestressed pore canal and the prefabricated T beam provided by the utility model have the advantages that the structure is reasonable, the construction is convenient and fast, the drawing piece made of rubber has certain flexibility, the bending condition of the prestressed pore canal can be flexibly adjusted, and the pore-forming quality of the prestressed pore canal is ensured.

Description

Pore-forming device of prestressed duct and prefabricated T beam

Technical Field

The utility model belongs to the technical field of constructional engineering, and relates to a pore-forming device of a prestressed duct and a prefabricated T-beam.

Background

In the construction of highway bridges, a prestressed pipeline inside a prefabricated T-beam is usually constructed in an auxiliary way by adopting a polyethylene corrugated pipe or a steel corrugated pipe. Specifically, before pouring, penetrating plastic hoses with the inner diameter smaller than that of the corrugated pipe by 10mm, and penetrating the corrugated pipe into 4 small plastic hoses; and after the concrete pouring is finished, the plastic hose is manually pulled out.

Because the corrugated pipe is easy to damage in the pouring process, concrete enters the prestressed duct to influence the construction quality of the prefabricated T beam, the machining qualification rate of the prefabricated T beam is low, and the project construction cost is increased.

Therefore, there is a need to design a hole forming device for a prestressed duct and a prefabricated T-beam, so as to solve the technical problems existing in the prior art.

Disclosure of Invention

The utility model aims to at least solve part of the technical problems in the prior art to a certain extent, and provides a hole forming device for a prestressed duct and a prefabricated T-beam, which are reasonable in structure, convenient and fast to construct, and a drawing piece made of rubber has certain flexibility and can flexibly adjust the bending condition of the prestressed duct; in addition, the mode of the auxiliary construction of the traditional corrugated pipe is abandoned, the pore-forming quality of the prestressed pore canal is ensured, the qualification rate of the prefabricated T beam is improved, and the construction cost is controlled.

In order to solve the technical problems, the utility model provides a pore-forming device for a prestressed pore channel, which comprises a drawing piece, wherein the drawing piece is arranged in a die of a prefabricated T beam through a positioning steel bar; the drawing piece is a flexible hollow pipe fitting, and steel strands are arranged in the drawing piece; the number of the positioning steel bars is multiple, and the positioning steel bars are arranged at intervals along the length direction of the prefabricated T beam so as to fix the installation set positions of the drawing piece; the drawer is made of rubber material.

In some embodiments, the drawer is made of natural rubber with a wall thickness of 10-30mm.

In some embodiments, the steel strands are disposed concentrically inside the drawer.

In some embodiments, the outer peripheral side of the drawer is provided with a release layer, which is uniformly disposed outside the drawer.

In some embodiments, the release layer is made of polytetrafluoroethylene.

In some embodiments, the release layer has a thickness of 0.1-0.5mm.

In some embodiments, the spacer bars are 12mm diameter bars, and the lateral spacing between adjacent spacer bars is 100-300mm.

In addition, the utility model also discloses a prefabricated T-beam, which uses the hole forming device, wherein the number of the prestressed pore canals of the prefabricated T-beam is multiple, and the prestressed pore canals are arranged along the length direction of the prefabricated T-beam.

In some embodiments, the pre-stressed tunnels are dispersed at an end face of the pre-fabricated T-beam, the pre-stressed tunnels converging in the middle of the pre-fabricated T-beam to form a curved pre-stressed tunnel.

In some embodiments, the pre-stressing tunnels have an inner diameter of 60-80mm, and the pullout member has an outer diameter matching the inner diameter of the pre-stressing tunnels.

The utility model has the beneficial effects that:

the pore-forming device for the prestressed duct and the prefabricated T beam provided by the utility model have the advantages that the structure is reasonable, the construction is convenient and fast, the drawing piece made of rubber has certain flexibility, and the bending condition of the prestressed duct can be flexibly adjusted; in addition, the mode of the auxiliary construction of the traditional corrugated pipe is abandoned, the pore-forming quality of the prestressed pore canal is ensured, the qualification rate of the prefabricated T beam is improved, and the construction cost is controlled.

Drawings

The above-described advantages of the present utility model will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the utility model, wherein:

FIG. 1 is a schematic diagram of a pre-stressed tunnel forming apparatus according to the present utility model;

fig. 2 is a schematic view of a spacer bar defining drawer according to the present utility model;

FIG. 3 is a schematic view of a prefabricated T-beam according to the present utility model;

FIG. 4 is a cross-sectional view of A-A of FIG. 3;

fig. 5 is a cross-sectional view of B-B in fig. 3.

Detailed Description

Fig. 1 to 5 are schematic diagrams of a pre-stressing tunnel forming device and a pre-fabricated T-beam according to the present application, and the present utility model will be described in detail with reference to specific embodiments and drawings.

The examples described herein are specific embodiments of the present utility model, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the utility model to the embodiments and scope of the utility model. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.

The drawings in the present specification are schematic views, which assist in explaining the concept of the present utility model, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present utility model, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.

The utility model discloses a schematic diagram of a pore-forming device of a prestressed pore canal, which is shown in fig. 1. The pre-stressing tunnel boring device comprises a drawer 10, said drawer 10 being arranged in a mould for prefabricating a T-beam by means of a spacer bar 20 as shown in fig. 2.

Further, the drawing member 10 is a hollow pipe having flexibility, and steel strands 30 are provided inside the hollow pipe to increase the strength of the drawing member 10. The number of the positioning steel bars 20 is a plurality, and the positioning steel bars are arranged at intervals along the length direction of the prefabricated T beam so as to fix the installation setting position of the drawing piece 10.

In fig. 2, the positioning bars 20 are bars with a diameter of 12mm, and the lateral spacing between adjacent positioning bars 20 is 100-300mm, so as to ensure the accuracy of the fixing position of the drawing member 10.

As an embodiment of the present utility model, the drawer 10 is made of a rubber material. Preferably, the drawer 10 is made of natural rubber with a wall thickness of 10-30mm.

In fig. 1, the steel strands 30 are concentrically arranged in the drawing member 10, so that the steel strands 30 deform synchronously along with the drawing member 10, and the construction requirement of the prestressed duct is met.

As an embodiment of the present utility model, the outer circumferential side of the drawer 10 is provided with a release layer 40, as shown in fig. 1, which is uniformly disposed on the outer side of the drawer 10, so as to facilitate the separation of the drawer 10 from the concrete structure after the construction of the prefabricated T-beam is completed.

According to the utility model, the drawing piece 10 is adopted to perform the forming construction of the prestressed duct, so that the condition that concrete enters the prestressed duct when the corrugated pipe is adopted to assist the construction in the prior art is avoided, and the forming quality of the prestressed duct is effectively ensured.

Preferably, the release layer 40 is made of polytetrafluoroethylene. It will be appreciated that the release layer 40 may be made of other non-metallic materials. In some embodiments, the release layer 40 has a thickness of 0.1-0.5mm.

Meanwhile, the utility model also discloses a prefabricated T-beam, as shown in fig. 3, wherein the prefabricated T-beam is constructed by using the pore-forming device, and the number of prestressed pore canals of the prefabricated T-beam is multiple, and the prestressed pore canals are arranged along the length direction of the prefabricated T-beam.

FIG. 4 is a cross-sectional view of A-A in FIG. 3, and FIG. 5 is a cross-sectional view of B-B in FIG. 3; the prestressed duct is dispersed at the end face of the prefabricated T beam, and the prestressed duct gathers together in the middle of the prefabricated T beam to form a bent prestressed duct.

Further, the inner diameter of the prestressed duct is 60-80mm, and the outer diameter of the drawing member 10 is matched with the inner diameter of the prestressed duct. Preferably, the outer diameter of the drawer 10 is equal to the inner diameter of the prestressed duct to meet the construction requirements of the prefabricated T-beam.

Compared with the defects and shortcomings of the prior art, the hole forming device for the prestressed duct and the prefabricated T beam are reasonable in structure, convenient to construct and capable of flexibly adjusting the bending condition of the prestressed duct, and the drawing piece made of rubber has certain flexibility; in addition, the mode of the auxiliary construction of the traditional corrugated pipe is abandoned, the pore-forming quality of the prestressed pore canal is ensured, the qualification rate of the prefabricated T beam is improved, and the construction cost is controlled.

The present utility model is not limited to the above embodiments, and any person can obtain other products in various forms under the teaching of the present utility model, however, any changes in shape or structure of the products are included in the scope of protection of the present utility model, and all the products having the same or similar technical solutions as the present application are included in the present utility model.

Claims

1. The device for forming the prestressed duct is characterized by comprising a drawing piece (10), wherein the drawing piece (10) is arranged in a die of a prefabricated T beam through a positioning steel bar (20); the drawing piece (10) is a flexible hollow pipe fitting, and a steel strand (30) is arranged in the drawing piece; the number of the positioning steel bars (20) is a plurality, and the positioning steel bars are arranged at intervals along the length direction of the prefabricated T beam so as to fix the installation setting positions of the drawing piece (10); the drawer (10) is made of a rubber material.

2. The hole forming device according to claim 1, characterized in that the drawer (10) is made of natural rubber with a wall thickness of 10-30mm.

3. The hole forming device according to claim 1, characterized in that the steel strand (30) is arranged concentrically inside the drawer (10).

4. The hole forming apparatus according to claim 1, wherein a release layer (40) is provided on an outer peripheral side of the drawer (10), and is uniformly provided on an outer side of the drawer (10).

5. The pore forming device of claim 4, wherein the release layer (40) is made of polytetrafluoroethylene.

6. The pore-forming apparatus of claim 5, wherein the release layer (40) has a thickness of 0.1 to 0.5mm.

7. The hole forming apparatus according to claim 1, wherein the spacer bars (20) are bars having a diameter of 12mm, and the lateral spacing between adjacent spacer bars (20) is 100-300mm.

8. A prefabricated T-beam, characterized in that a number of prestressed channels of the prefabricated T-beam is plural, which are arranged in the length direction of the prefabricated T-beam, using the hole forming device according to any one of claims 1 to 7.

9. The precast T-beam of claim 8, wherein the pre-stressed tunnels are dispersed at an end face of the precast T-beam, the pre-stressed tunnels being gathered in the middle of the precast T-beam to form curved pre-stressed tunnels.

10. The prefabricated T-beam according to claim 9, wherein the inner diameter of the pre-stressing channel is 60-80mm, and the outer diameter of the drawer (10) matches the inner diameter of the pre-stressing channel.