Tensioning slot formwork structure and method for ensuring welding length of steel bar cut off by tensioning slot

Abstract

The present application discloses a tensioning notch template structure and a method for ensuring the welding length of the steel bar cut by the tensioning notch. The tensioning notch template structure comprises: an inner mold and an outer mold arranged outside the inner mold, the outer mold is arranged opposite to the connecting steel bar joint, the thickness of the outer mold is greater than or equal to the welding length of the connecting steel bar joint, and the outer mold is made of a flexible material so that the connecting steel bar joint can be inserted into the outer mold. The present application solves the problem in the related art that the tensioning notch is difficult to ensure the welding length of the steel bar and is easy to be damaged and cannot be used continuously.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a tensioning slot template structure and a method for ensuring that the tensioning slot cuts off the welding length of steel bars. Background Art

[0002] In order to ensure the smooth tensioning of the cast-in-place box girder, it is necessary to set tensioning notches at its ends. At this time, the end cross beam reinforcement needs to be cut at the tensioning notch and welded after the tensioning is completed. In order to ensure the welding length of the reinforcement in the later stage, the conventional practice is to pass the reinforcement through the tensioning notch, or to chisel out the concrete around the reinforcement in the later stage. The disadvantages of this practice are: the reinforcement passing through the tensioning notch will reduce the tensioning space in the later stage, affecting the subsequent tensioning, and the concrete will leak when vibrating at the perforation; the structure of the tensioning groove will be destroyed after perforation, and the tensioning notch will be scrapped after use and cannot be recycled; chiseling out the concrete will destroy the finished product after pouring, and it is difficult to meet the single-sided welding length requirements, which is labor-intensive and time-consuming, and the effect is not good.

[0003] With regard to the problem in related technologies that tensioning notches are difficult to ensure the welding length of the steel bars and are easily damaged and cannot be used continuously, no effective solution has been proposed so far. Summary of the invention

[0004] The main purpose of the present application is to provide a tensioning slot template structure and a method for ensuring that the tensioning slot cuts off the welding length of the steel bars, so as to solve the problem in the related art that the tensioning slot is difficult to ensure the welding length of the steel bars and is easily damaged and cannot be used continuously.

[0005] In order to achieve the above-mentioned purpose, the present application provides a tensioning slot template structure, which includes: an inner mold and an outer mold arranged on the outside of the inner mold, the outer mold is arranged opposite to the connecting steel bar joint, the thickness of the outer mold is greater than or equal to the welding length of the connecting steel bar joint, and the outer mold is made of flexible material so that the connecting steel bar joint can be inserted into the outer mold.

[0006] Furthermore, the inner mold is a steel mold or a wooden mold, which is used to form a tensioning notch after pouring.

[0007] Furthermore, the outer mold is fitted on both sides of the inner mold, and the outer mold and the inner mold are detachably connected.

[0008] Furthermore, the outer mold adopts a foam board.

[0009] Furthermore, the thickness of the outer mold is greater than or equal to ten times the diameter of the connecting steel bar joint.

[0010] Furthermore, a concrete release agent is coated on one side of the outer mold close to the steel bar joint.

[0011] Further, according to another aspect of the present application, a method for ensuring that the tensioning groove cuts off the welding length of the steel bar is provided, the method using a template structure, comprising the following steps:

[0012] Cut the corresponding steel bars according to the requirements of the tensioning notch and form a connecting steel bar joint;

[0013] Install the inner formwork and set the outer formwork between the inner formwork and the connecting steel bar joints;

[0014] Insert the connecting steel bar joint into the outer mold and squeeze it tightly. The insertion length should be greater than or equal to the welding length.

[0015] Furthermore, it also includes: after the inner mold and the outer mold are installed, concrete is poured and tensioned; after the concrete pouring and tensioning are completed, the outer mold and the inner mold are taken out to expose the connecting steel bar joints, and the connecting steel bars are welded.

[0016] Furthermore, the welding length of the connecting steel bar joint and the connecting steel bar is 10d.

[0017] Furthermore, 7 days after the concrete pouring and tensioning are completed, the outer mold and the inner mold are taken out to expose the connecting steel bar joints, which are then welded to the connecting steel bars.

[0018] In an embodiment of the present application, an inner mold and an outer mold arranged on the outside of the inner mold are provided, the outer mold is arranged opposite to the connecting steel bar joint, the thickness of the outer mold is greater than or equal to the welding length of the connecting steel bar joint, and the outer mold is made of a flexible material so that the cut steel bars can be inserted into the outer mold, thereby reserving a connecting steel bar joint of sufficient welding length in the outer mold without damaging the inner mold structure, thereby achieving the technical effect of ensuring the welding length of the steel bars in the tensioning slot, protecting the inner mold of the tensioning slot from being damaged, and allowing the inner mold to be used continuously, thereby solving the problem in the related art that it is difficult to ensure the welding length of the steel bars in the tensioning slot and it is easy to be damaged and cannot be used continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] Figure 1 is a schematic structural diagram according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a process according to an embodiment of the present application;

[0022] Among them, there are 1 tensioning groove, 2 inner molds, 3 outer molds, and 4 connecting steel bar joints. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0025] In this application, the terms "upper", "lower", "inner", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0027] In addition, the terms "disposed", "provided with", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In addition, the term "plurality" shall mean two or more.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figure 1As shown, an embodiment of the present application provides a tensioning slot 1 template structure, which includes: an inner mold 2 and an outer mold 3 arranged on the outside of the inner mold 2, the outer mold 3 is arranged opposite to the connecting steel bar joint 4, the thickness of the outer mold 3 is greater than or equal to the welding length of the connecting steel bar joint 4, and the outer mold 3 is made of flexible material so that the connecting steel bar joint 4 can be inserted into the outer mold 3.

[0031] In this embodiment, the setting of a tensioning groove 1 by cutting off the steel bars at the end of the cast-in-place box girder is taken as an example for explanation. After the steel bars at the end are cut off, a tensioning groove 1 with a certain size is formed and a connecting steel bar joint 4 of a certain length is left, which is used for subsequent welding with the steel bars for reinforcement. The size of the tensioning groove 1 should meet the requirements of subsequent tensioning. After the steel bars are cut off, the inner mold 2 and the outer mold 3 are installed in the tensioning groove 1. In this embodiment, the outer mold 3 is installed at both ends of the tensioning groove 1 and abuts against the connecting steel bar joint 4. Since the thickness of the outer mold 3 is greater than or equal to the length of the connecting steel bar joint 4, specifically ten times the diameter of the connecting steel bar joint 4, the connecting steel bar joint 4 can be inserted into the outer mold 3 under the action of external force. In order to facilitate the insertion of the connecting steel bar joint 4, the outer mold 3 can be made of flexible material, such as foam board. In order to avoid other parts of the outer mold 3 during the insertion process, If the inner mold 2 and the outer mold 3 are damaged, the corresponding inner mold 2 and the outer mold 3 should be kept close together. The inner mold 2 can be made of a material with a certain strength, such as a wooden mold or a steel mold. The insertion length of the connecting steel bar joint 4 is greater than or equal to the welding length. After the inner mold 2 and the outer mold 3 are installed, the concrete can be poured and tensioned. Since the connecting steel bar joint 4 is inserted into the outer mold 3 under the action of external force, the connection with the outer mold 3 can be kept tight, without affecting the tensioning slot 1 space, and the outer mold 3 will not leak during vibration. Since the inner mold 2 is not damaged, it is not necessary to open a hole for the connecting steel bar joint 4 to pass through, so it can be recycled, and the outer mold 3 can also protect the inner mold 2. After the tensioning is completed, the inner mold 2 and the outer mold 3 can be removed to expose the connecting steel bar joint 4 that guarantees the welding length, without chiseling the finished concrete product, which is not only beautiful, but also saves time and effort. This solves the problem in the related art that the tensioning slot 1 is difficult to ensure the welding length of the steel bar and is easily damaged and cannot be used continuously.

[0032] like Figure 1 As shown, the outer mold 3 is fitted on both sides of the inner mold 2, and the outer mold 3 and the inner mold 2 are detachably connected. After completing a tensioning groove 1, the outer mold 3 on both sides of the inner mold 2 can be removed, and a new outer mold 3 can be installed to cast the next tensioning groove 1. The outer mold 3 can be made of low-cost materials, such as foam board; a side of the outer mold 3 close to the steel bar joint 4 is coated with a concrete release agent. By coating the concrete release agent on the outer side of the outer mold 3, it is convenient to remove the outer mold 3 after the concrete pouring is completed.

[0033] like Figure 2As shown, according to another aspect of the present application, a method for ensuring that the tensioning groove cuts off the welding length of the steel bar is provided, the method using a template structure, comprising the following steps:

[0034] S10, cutting the corresponding steel bars according to the requirements of the tensioning notch 1, and forming a connecting steel bar joint 4;

[0035] S20, installing the inner mold 2, and setting the outer mold 3 between the inner mold 2 and the connecting steel bar joint 4;

[0036] S30, insert the connecting steel bar joint 4 into the outer mold 3 and squeeze it tightly, and the insertion length is greater than or equal to the welding length.

[0037] The invention also includes: after the inner mold 2 and the outer mold 3 are installed, concrete pouring and tensioning are performed; after the concrete pouring and tensioning are completed, the outer mold 3 and the inner mold 2 are taken out to expose the connecting steel bar joint 4, and the connecting steel bar is welded.

[0038] The welding length of the connecting steel bar joint 4 and the connecting steel bar is 10d; 7 days after the concrete pouring and tensioning are completed, the outer mold 3 and the inner mold 2 are taken out to expose the connecting steel bar joint 4, which is welded to the connecting steel bar to ensure the overall connection quality.

[0039] In this embodiment, the outer mold 3 is installed at both ends of the tensioning slot 1 and abuts against the connecting steel bar joint 4. Since the thickness of the outer mold 3 is greater than or equal to the length of the connecting steel bar joint 4, the connecting steel bar joint 4 can be inserted into the outer mold 3 under the action of external force. In order to facilitate the insertion of the connecting steel bar joint 4, the outer mold 3 can be made of flexible material, such as foam board. In the insertion process, in order to avoid the outer mold 3 being punctured, the corresponding inner mold 2 and outer mold 3 should be kept close. The inner mold 2 can be made of a material with a certain strength, such as a wooden mold or a steel mold. The insertion length of the connecting steel bar joint 4 is greater than or equal to the welding length. 3 After installation, concrete pouring and tensioning can be carried out. Since the connecting steel bar joint 4 is inserted into the outer mold 3 under the action of external force, the connection with the outer mold 3 can be kept tight, without affecting the tensioning slot 1 space, and the outer mold 3 will not leak during vibration. Since the inner mold 2 is not damaged, there is no need to open a hole for the connecting steel bar joint 4 to pass through, so it can be recycled, and the outer mold 3 can also protect the inner mold 2. After the tensioning is completed, the inner mold 2 and the outer mold 3 are removed to expose the connecting steel bar joint 4 that guarantees the welding length, without chiseling the finished concrete product, which is not only beautiful, but also time-saving and labor-saving. This solves the problem in the related art that the tensioning slot 1 is difficult to ensure the welding length of the steel bar and is easily damaged and cannot be used continuously.

[0040] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Within the spirit and principle of the present application, any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present application.

Claims

1. A tensioning notch template structure, characterized in that: include: An inner mold and an outer mold arranged outside the inner mold, the outer mold is arranged opposite to the connecting steel bar joint, the thickness of the outer mold is greater than or equal to the welding length of the connecting steel bar joint, and the outer mold is made of a flexible material so that the connecting steel bar joint can be inserted into the outer mold; the outer mold is fitted on both sides of the inner mold, and the outer mold and the inner mold are detachably connected; The inner mold is a steel mold or a wooden mold, which is used to form a tensioning notch after pouring; The outer mold is made of foam board; The thickness of the outer mold is greater than or equal to ten times the diameter of the connecting steel bar joint; A concrete release agent is coated on one side of the outer mold close to the steel bar joint.

2. A method for ensuring the welding length of the tensioning groove to cut off the steel bar, characterized in that: Using the template structure as claimed in claim 1, comprising the following steps: Cut the corresponding steel bars according to the requirements of the tensioning notch and form a connecting steel bar joint; Install the inner formwork and set the outer formwork between the inner formwork and the connecting steel bar joints; Insert the connecting steel bar joint into the outer mold and squeeze it tightly. The insertion length should be greater than or equal to the welding length. Also includes: After the inner and outer forms are installed, concrete pouring and tensioning are carried out; After the concrete pouring and tensioning are completed, the outer and inner molds are removed to expose the connecting steel bar joints, which are then welded to the connecting steel bars.

3. The method for ensuring the welding length of the tensioning groove cutting the steel bar according to claim 2 is characterized in that: The welding length between the connecting steel bar joint and the connecting steel bar is 10d.

4. The method for ensuring the welding length of the tensioning groove cutting the steel bar according to claim 2 is characterized in that: 7 days after the concrete pouring and tensioning are completed, the outer and inner molds are removed to expose the connecting steel bar joints, which are then welded to the connecting steel bars.

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