Pre-stress anchor cable stretching and drawing system and pre-stress anchor cable stretching and drawing method

Abstract

The invention provides a pre-stress anchor cable stretching and drawing system and a pre-stress anchor cable stretching and drawing method. The stretching and drawing system comprises a support, a hollow jack and a tool clamping piece. A first end of the support is provided with an external supporting face and an internal supporting face. A second end of the support buckles a working anchor into the support, and thus all steel strands penetrate into the support from the second end, and penetrate out from the first end. All the steel strands penetrating out from the first end penetrate into a penetration hole of the hollow jack. A base of the hollow jack is arranged on the external supporting face. A piston rod of the hollow jack is arranged away from the support, the outer end of the piston rod can be matched with all the steel strands penetrating through the hollow jack, and by means of stretching out or retracting of the piston rod, the steel strands matched with the piston rod can be driven to stretch out and retract. The tool clamping piece is used for being clamped to one group of the steel strands with the same load and close to the working anchor, by means of external force,the tool clamping piece is clamped into an anchor hole of the working anchor, and thus the group of the steel strands with the same load and stretched out or retracted in place can be locked to the working anchor.

Description

technical field [0001] The invention relates to the technical field of anchoring engineering, in particular to a prestressed anchor cable tensioning system and a prestressed anchor cable tensioning method. Background technique [0002] At present, for the traditional tensioning technology of anchor cables with different lengths of steel strands in unit groups, the anchor cables with different lengths of steel strands in unit groups are generally tensioned according to the unit groups, or the tension is compensated by differential loads before tensioning. The steel strands of multiple unit groups are pulled in the same tension. [0003] However, when stretching separately according to the unit group, the traditional anchor cable tensioning technology needs to perform multiple tensions according to the number of unit groups, which is laborious and risky. When the tension is compensated by differential loads, the steel strands of the anchor cables of each unit group are jointl...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a prestressed anchor cable tensioning system and a prestressed anchor cable tensioning method to solve the problems of the prior art, such as many times of tensioning, high construction risk, and low precision.

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