Post-tensioning prestress hole cleaning and reeving device and method

Abstract

The invention discloses a post-tensioning prestress hole cleaning and reeving device and method, and belongs to the technical field of engineering construction facilities. The device is characterized in that one end of a connecting rod is in a shape of a four-edge tetragonal prism, and the other end is hollow and cylindrical; the end of tetragonal prism is tightly connected with a power device in an inserted manner, and the hollow and cylindrical end is tightly connected with a cable type drilling rod in an inserted manner; the cable type drilling rod is a low-relaxation unbonded prestressed steel strand with strength and toughness; the drill bit is in a semi-hollow cylindrical structure and is tightly connected with the cable type drilling rod in an inserted manner, the non-hollow end is cylindrical, and outer diameter of the cylindrical end is larger than that of the hollow end. The device has the advantages that destroys on an existing structure are reduced to the utmost extent, and construction quality of post-tensioning prestress can be guaranteed effectively; the reeving method is time saving and force saving; reeving quality can be guaranteed easily; application range is wide, and construction cost is low; structure is simple and operation is facilitated; the device is simple in structure and convenient to operate, and ordinary workers can operate the device to perform construction after simple training.

Description

technical field [0001] The invention belongs to the technical field of engineering construction facilities, and relates to an improvement of a prefabricated component manufacturing tool and a manufacturing method. Background technique [0002] At present, in the process of civil engineering construction, due to the influence of its construction technology, it is necessary to reserve prestressed reinforcement channels in the component body when prefabricating components. ) two hole-forming processes, and no matter which method is used to form holes, there will be phenomena such as the local section of the hole becoming smaller or blocked due to improper operation, resulting in low efficiency of manpower threading or failure to complete the threading work. In this case , the usual solution is to find the problematic part of the tunnel, and then apply prestress after excavation, dredging, and repair. This method has a long cycle, difficult quality control, and serious damage to...

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Problems solved by technology

[0002] At present, in the process of civil engineering construction, due to the influence of its construction technology, it is necessary to reserve prestressed reinforcement channels in the component body when prefabricating components. ) two hole-forming processes, and no matter which method is used to form holes, there will be phenomena such as the local section of the hole becoming smaller or blocked due to improper operation, resulting in low efficiency of manpower threading or failure to complete the threading work. In this case , the usual solution is to find the problematic part of the tunnel, and then apply prestress after excavation, dredging, and repair. This method has a long cycle, difficult quality control, and serious damage to the beam body, which has brought adverse consequences to the construction quality and progress of the project. and increased construction costs

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