Steel strand cutting method after pre-stress tensioning in cover beam deep-buried sleeve

A cutting method and technology for steel strands, which are used in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as corrosion and affect the appearance quality of the end of the cover beam, and achieve high efficiency, reduce sparks, and speed. Effect

Inactive Publication Date: 2021-08-10
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP NO 4 ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the steel strands in the deep-buried sleeve of the cover beam are reserved too long, the end of the cover beam will form round spots after the anchor is sealed, and the corrosion will affect the appearance quality of the end of the cover beam after a long time, and further provides a cover Cutting method of steel strands after prestressing and tensioning in deep-buried sleeves of beams

Method used

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  • Steel strand cutting method after pre-stress tensioning in cover beam deep-buried sleeve
  • Steel strand cutting method after pre-stress tensioning in cover beam deep-buried sleeve

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1 to Figure 2 Describe this embodiment, the cutting device used in the cutting method described in this embodiment includes: clamp 1, oil delivery pipe 2 and hydraulic pump 3, a plurality of steel sleeves are provided in the cover beam, and each steel sleeve is provided with The steel strand 4, the clamp 1 is connected with the electric hydraulic pump 3 through the oil delivery pipe 2, the electric hydraulic pump 3 is located on the platform support 5 on one side of the cover beam, the clamp 1 is clamped on the end of the steel strand 4, the cutting The method proceeds as follows:

[0020] Step 1: Connect the clamp 1 to the electric hydraulic pump 3 through the oil delivery pipe 2;

[0021] Step 2: Fix the clamp 1 on the steel strand 4 in the deep-buried steel sleeve;

[0022] Step 3: start the electric hydraulic pump 3, and clamp the steel strand 4 through the clamp 1;

[0023] Step 4: Use steel formwork at the end o...

specific Embodiment approach 2

[0025] Specific implementation mode two: combination Figure 1 to Figure 2 The present embodiment will be described. The operating pressure of the electric hydraulic pump 3 in the present embodiment is 70MP. Other components are the same as those in Embodiment 1 in terms of connections.

specific Embodiment approach 3

[0026] Specific implementation mode three: combination Figure 1 to Figure 2 The present embodiment will be described. The clamping force of the clamp 1 according to the present embodiment is 1250 daN.

[0027] Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a steel strand cutting method after pre-stress tensioning in a cover beam deep-buried sleeve, relates to a steel strand cutting method, and aims to solve the problems that a steel strand in the cover beam deep-buried sleeve is reserved too long, round points are formed at the end part of a cover beam after anchor sealing, and the appearance quality of the end part of the cover beam is affected by corrosion after long time. The cutting method comprises the following steps that 1, a clamp is connected with an electric hydraulic pump through an oil conveying pipe; 2, a clamp is fixed on the steel strand in the deeply-buried steel sleeve; 3, the electric hydraulic pump is started, and the steel strand is pinched off through the clamp; and 4, the end part of a cover beam is blocked by adopting a steel form, a concrete pouring gap is reserved, micro-expansion fine aggregate concrete is poured into the steel sleeve, and the steel form is removed after the concrete reaches the strength. According to the steel strand cutting method, the hydraulic pump is adopted to control the clamp to pinch off the steel strand in the deep-buried sleeve at the end part of the cover beam, so that the end of the cover beam is better subjected to pre-stress tensioning and then end sealing, and the appearance quality of the end part of the cover beam is ensured.

Description

technical field [0001] The invention relates to a method for cutting steel strands, in particular to a method for cutting steel strands after prestressed stretching in a cover beam deep buried sleeve. The invention relates to the technical field of prestressed structures. Background technique [0002] Prestressing technology mainly takes preventive and control measures in advance for the parts of the project that may generate stress, so as to prevent the structure of the project from being changed when the project is subjected to external forces, resulting in deformation and structural damage. Therefore, the stress is constructed inside the stress module in advance to resist the destructive effect of external stress. In bridge engineering, the tensile stress is mainly constructed in advance for the modules that will be subjected to external loads during use, so as to reduce the strong pressure and tension brought by external loads, which can effectively delay the generation ...

Claims

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Application Information

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IPC IPC(8): B21F11/00E01D21/00
CPCB21F11/00E01D21/00
Inventor刘颂春常亮苏艳友唐小军李元涛程为张琪王雷
OwnerCHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP NO 4 ENG