A tool for fast installation of prestressed steel strand clamps and a construction method

Abstract

The application provides a tool for fast installation of prestressed steel strand clamps and a construction method. The tool comprises a positioning body which penetrates through the end portions of a plurality of steel strands, cooperates with the steel strands in a gap mode, and can push a plurality of clamps to move simultaneously along the steel strands towards an anchor head. The application has the beneficial effects of realizing fast and accurate installation of large prestressed concrete steel strand clamps, improving the problems of low efficiency and poor installation accuracy of the traditional construction method, greatly shortening the construction period, saving labor cost, and being simple in structure and convenient to operate.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and in particular relates to a tool and construction method for quickly installing prestressed steel strand clamps. Background Technology

[0002] Ordinary concrete members are prone to cracking when subjected to tension because the tensile stress exceeds the tensile strength. However, prestressed concrete uses prestress to offset the tensile stress generated by the load, which can make the members almost free of cracks or delay crack development during normal use. Therefore, the use of prestressed concrete has become one of the core technologies for large-span, high-load, and long-life structures in civil engineering today.

[0003] Post-tensioned prestressed concrete is the most widely used method in prestressed concrete engineering. The installation and tensioning of post-tensioned prestressed steel strands are extensively employed. As a crucial step in prestressed structure construction, the speed of prestressed steel strand installation directly impacts the project's progress. The main steps in installing post-tensioned steel strands include: strand threading → anchorage installation (including anchor head installation and wedge installation) → strand tensioning. Figure 1 As shown, the traditional method for installing the clip 4 is to insert the clip 4 of each steel strand 5 into the steel strand 5, and then insert a steel pipe 6 into the rear end of the clip 4 to impact the clip 4 so that it is securely fixed into the anchor head 3. After each clip 4 enters the anchor head 3, the embedding degree of multiple steel strand clips 4 is adjusted one by one so that the ends of multiple clips 4 are on the same plane and parallel to the end of the anchor head.

[0004] The following problems exist in the existing technology:

[0005] 1. Each group of prestressed steel strands contains a large number of steel strands. Moving the clamps on each steel strand one by one is a cumbersome operation, slow construction speed, and low work efficiency.

[0006] 2. After the wedges are inserted into the anchor head, their ends need to be adjusted one by one to ensure proper embedding, making it difficult to guarantee the installation quality of the wedges. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a tool and construction method for quickly installing prestressed steel strand clamps, effectively solving the technical problems of low installation efficiency and inability to guarantee installation quality, and overcoming the shortcomings of existing technologies.

[0008] The technical solution adopted in this invention is: a tool for quickly installing prestressed steel strand clamps, including a positioning body, which passes through the ends of multiple steel strands and is gap-fitted with the steel strands, and can push multiple clamps to move simultaneously along the steel strands toward the anchor head.

[0009] Furthermore, the positioning body is provided with a plurality of through holes, which are used to pass through the steel strands, and the through holes are clearance-fitted with the steel strands.

[0010] Furthermore, the diameter of the through hole is 5 to 8 mm larger than the diameter of the steel strand.

[0011] Furthermore, the diameter of the through hole is smaller than the diameter of the large end of the clip.

[0012] Furthermore, the plurality of through holes are evenly arranged on the positioning body.

[0013] Furthermore, the positioning body is circular.

[0014] Furthermore, the diameter of the positioning body is larger than the diameter of the anchor head.

[0015] Furthermore, the diameter of the positioning body is 100-150 mm larger than the diameter of the anchor head.

[0016] Furthermore, the thickness of the positioning body is 8-10 mm.

[0017] A construction method using a tool for quickly installing prestressed steel strand clamps as described above includes the following steps:

[0018] The steel strand is threaded into the concrete member and the anchor head is installed.

[0019] Insert the clip into the end of the steel strand;

[0020] The positioning body is inserted into the end of the steel strand and fitted with the clamp.

[0021] Push the positioning body so that the positioning body pushes the clamping piece into the end of the anchor head;

[0022] Tap the edge of the positioning body to make the clip embed into the anchor head setting position.

[0023] The advantages and positive effects of this invention are as follows: by adopting the above technical solution, the rapid and accurate installation of large prestressed concrete steel strand clamps is achieved, which improves the problems of low efficiency and poor installation accuracy of traditional construction methods, greatly shortens the construction period, saves labor costs, and has a simple structure and is easy to operate. Attached Figure Description

[0024] The above and other objects, features, and advantages of the present invention will become more apparent from the more detailed description of the embodiments of the invention in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same parts or steps.

[0025] Figure 1 This is a schematic diagram of the installation of traditional steel strand anchor clamps.

[0026] Figure 2 This is a schematic diagram of the structure of a tool for quickly installing prestressed steel strand clamps according to an embodiment of the present invention.

[0027] Figure 3 This is an installation diagram of a tool for quickly installing prestressed steel strand clamps according to an embodiment of the present invention.

[0028] In the diagram: 1. Positioning body; 2. Through hole; 3. Anchor head; 4. Wrapper; 5. Steel strand; 6. Steel pipe; 7. Anchor head hole. Detailed Implementation

[0029] This invention provides a tool and construction method for quickly installing prestressed steel strand clamps. The embodiments of this invention will be described below with reference to the accompanying drawings.

[0030] In the description of the embodiments of this invention, it should be understood that the terms "top," "bottom," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0031] like Figure 2 and Figure 3As shown in the figure, an embodiment of the present invention provides a tool for quickly installing prestressed steel strand clamps 4, including a positioning body 1. The positioning body 1 passes through the ends of multiple parallel steel strands 5 and is in clearance fit with the steel strands 5, which can push multiple clamps 4 to move simultaneously along the steel strands 5 toward the anchor head 3. The positioning body 1 is a plate. Compared with the prior art, which moves the clamps 4 one by one, the positioning body 1 passes through multiple steel strands 5, is perpendicular to the multiple steel strands 5, and simultaneously contacts multiple clamps 4 on one side. Pushing the positioning body 1 can drive multiple clamps 4 to move simultaneously along the steel strands 5 toward the anchor head 3, which is simple to operate and improves construction speed and work efficiency.

[0032] Specifically, the positioning body 1 is provided with multiple through holes 2, which are used to pass through steel strands 5, and the through holes 2 and steel strands 5 are fitted with a clearance fit. By providing the through holes 2, the positioning body 1 can move along the steel strands 5.

[0033] Preferably, the diameter of the through hole 2 is 5 to 8 mm larger than the diameter of the steel strand 5. For example, the diameter of the through hole 2 is 5 mm, 6 mm, 7 mm or 8 mm larger than the diameter of the steel strand 5.

[0034] Specifically, the diameter of the through hole 2 is smaller than the diameter of the large end of the clamp 4. The existing clamp 4 is conical.

[0035] When threaded onto the steel strand 5, the small end faces the anchor head 3. In order to facilitate the pushing of the clamp 4, the diameter of the threading hole 2 needs to be smaller than the diameter of the large end of the clamp 4.

[0036] Specifically, multiple through holes 2 are evenly arranged on the positioning body 1. The spacing of the through holes 2 must be the same as the spacing of the steel strands 5. In the prior art, the steel strands 5 are spaced at the same intervals, therefore, for ease of installation, the spacing of the through holes 2 must be the same as the spacing of the steel strands 5.

[0037] Preferably, the positioning body 1 is circular. The thickness of the positioning body 1 is 8 to 10 mm. For example, the thickness of the positioning body 1 is set to 8 mm, 9 mm or 10 mm.

[0038] Preferably, the diameter of the positioning body 1 is larger than the diameter of the anchor head 3. In the prior art, the anchor head 3 is usually circular. When the positioning body 1 pushes the small ends of the multiple clamping pieces 4 into the anchor head 3, it is necessary to further embed the clamping pieces 4 into the anchor head 3. During the further embedding process, it is necessary to tap the edge of the positioning body 1 so that the positioning body 1 simultaneously drives the multiple clamping pieces 4 into the anchor head 3, ensuring that the embedding length is the same, thereby ensuring the installation accuracy of the clamping pieces 4. In order to facilitate tapping and to make the positioning body 1 bear force, the diameter of the positioning body 1 needs to be larger than the diameter of the anchor head 3.

[0039] Preferably, the diameter of the positioning body 1 is 100-150 mm larger than the diameter of the anchor head 3. For example, the diameter of the positioning body 1 is 100 mm, 110 mm, 120 mm, 130 mm, 140 mm or 150 mm larger than the diameter of the anchor head 3.

[0040] Example 1: A tool for quickly installing prestressed steel strand clamps 4 includes a positioning body 1 with multiple through holes 2. The diameter of the through holes 2 is 5mm larger than the diameter of the steel strand 5. The diameter of the through holes 2 is smaller than the diameter of the large end of the clamp 4. The multiple through holes 2 are evenly arranged on the positioning body 1. The positioning body 1 is a circular steel plate. The thickness of the positioning body 1 is 8mm. The diameter of the positioning body 1 is 100mm larger than the diameter of the anchor head 3.

[0041] Example 2: A tool for quickly installing prestressed steel strand clamps 4, comprising a positioning body 1, on which multiple through holes 2 are provided. The diameter of the through holes 2 is 6mm larger than the diameter of the steel strand 5. The diameter of the through holes 2 is smaller than the diameter of the large end of the clamp 4. The multiple through holes 2 are evenly arranged on the positioning body 1. The positioning body 1 is a circular steel plate. The thickness of the positioning body 1 is 9mm. The diameter of the positioning body 1 is 120mm larger than the diameter of the anchor head 3.

[0042] Example 3: A tool for quickly installing prestressed steel strand clamps 4, comprising a positioning body 1, on which multiple through holes 2 are provided. The diameter of the through holes 2 is 8mm larger than the diameter of the steel strand 5. The diameter of the through holes 2 is smaller than the diameter of the large end of the clamp 4. The multiple through holes 2 are evenly arranged on the positioning body 1. The positioning body 1 is a circular steel plate. The thickness of the positioning body 1 is 10mm. The diameter of the positioning body 1 is 150mm larger than the diameter of the anchor head 3.

[0043] A construction method using a tool for quickly installing prestressed steel strand clamps 4 as described above includes the following steps:

[0044] S1, Production Tools.

[0045] A steel plate 1, 100-150 mm larger in diameter than the anchor head 3, is cut and used as the positioning body 1. The thickness of the steel plate is 8-10 mm. A through hole 2 is made on the steel plate according to the position and size of the steel strand 5. The diameter of the through hole 2 is 5-8 mm larger than the diameter of the steel strand 5.

[0046] S2. Insert the steel strand 5 into the concrete component and install the anchor head 3. The installation method of the anchor head 3 is existing technology and will not be described in detail here.

[0047] S3. Insert the clamp 4 into the end of the steel strand 5, and insert the clamp 4 of multiple steel strands 5 into the end of the steel strand 5 respectively.

[0048] S4. Insert the positioning body 1 into the end of the steel strand 5, and adjust the position of the clamp 4 and the positioning body 1 so that the large end of the positioning body 1 and the clamp 4 fit together.

[0049] S5. Apply a horizontal thrust toward the concrete member to the positioning body 1, so that the positioning body 1 pushes multiple clips 4 to move synchronously toward the anchor head 3 along the steel strand 5 until the small end of the clip 4 gently inserts into the end of the anchor head hole 7.

[0050] S6. Use a small hammer to symmetrically and evenly tap the edge of the positioning body 1 so that multiple clips 4 are simultaneously embedded into the set position of the anchor hole 7.

[0051] S7. Remove the tool from the steel strand 5 and proceed with the installation of the next anchor head 3, steel strand 5, and clamp 4.

[0052] The advantages and positive effects of this invention are:

[0053] It enables rapid and accurate installation of large prestressed concrete steel strand clamps, improving the problems of low efficiency and poor installation accuracy of traditional construction methods, significantly shortening the construction period, saving labor costs, and featuring a simple structure and convenient operation.

[0054] The embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0055] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A tool for quickly installing prestressed steel strand clamps, characterized in that: It includes a positioning body that passes through the ends of multiple steel strands and is gap-fitted with the steel strands, which can push multiple clamping pieces to move simultaneously along the steel strands toward the anchor head.

2. The tool for quickly installing prestressed steel strand clamps according to claim 1, characterized in that: The positioning body is provided with multiple through holes for threading the steel strand through, and the through holes are clearance-fitted with the steel strand.

3. The tool for quickly installing prestressed steel strand clamps according to claim 2, characterized in that: The diameter of the through hole is 5 to 8 mm larger than the diameter of the steel strand.

4. The tool for quickly installing prestressed steel strand clamps according to claim 3, characterized in that: The diameter of the through hole is smaller than the diameter of the large end of the clip.

5. The tool for quickly installing prestressed steel strand clamps according to claim 4, characterized in that: The multiple through holes are evenly arranged on the positioning body.

6. A tool for quickly installing prestressed steel strand clamps according to any one of claims 1-5, characterized in that: The positioning body is circular.

7. The tool for quickly installing prestressed steel strand clamps according to claim 6, characterized in that: The diameter of the positioning body is larger than the diameter of the anchor head.

8. The tool for quickly installing prestressed steel strand clamps according to claim 7, characterized in that: The diameter of the positioning body is 100-150 mm larger than the diameter of the anchor head.

9. A tool for quickly installing prestressed steel strand clamps according to any one of claims 1-5 and 7-8, characterized in that: The thickness of the positioning body is 8-10 mm.

10. A construction method using a tool for quickly installing prestressed steel strand clamps as described in claim 1, characterized in that, Includes the following steps: The steel strand is threaded into the concrete member and the anchor head is installed. Insert the clip into the end of the steel strand; The positioning body is inserted into the end of the steel strand and fitted with the clamp. Push the positioning body so that the positioning body pushes the clamping piece into the end of the anchor head; Tap the edge of the positioning body to make the clip embed into the anchor head setting position.

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