Development method of a prestressed steel strand open anchorage
A prestressed steel strand, open-type technology, applied in the development field of prestressed steel strand open-type anchorage, to achieve the effect of simple and practical anchorage, simple operation, and small loss of prestress
Inactive Publication Date: 2016-05-11
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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[0003] The purpose of the embodiment of the present invention is to provide a method for developing a prestressed steel strand open anchorage, aiming at solving the need for engineering transformation and the need to remove the project at one end of the steel strand without affecting the prestressing effect of the remaining part The problem
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[0054] The present invention is achieved in this way, a method for developing a prestressed steel strand open-type anchor. One end of the steel strand adopts an ordinary steel strand anchor, and a force sensor is installed to measure the stress of the steel strand. After tensioning with the prestressed front clip tension jack (YDC240QX type produced by Liuzhou Ovim), install the open anchorage, then loosen the tension jack, and install the open anchorage A and the open anchorage B respectively;
[0055] Concrete steps of the present invention are:
[0056] 1. Whether the open anchor can anchor the steel strand test
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The invention discloses a method for developing a prestress steel strand open type anchorage device. The method for developing the prestress steel strand open type anchorage device comprises the following steps that a force sensor and the anchorage device are mounted, and a steel strand is anchored through the open type anchorage device; hole drilling and scabbling are carried out through a concrete test cube, cobbly surface concrete after scabbling is simulated, and support leveling treatment is carried out through two kinds of cementing materials and steel plates respectively; the steel strand is cut off, the anchorage device is dismounted, and the force sensor is observed. A newly-developed anchorage device is arranged at a certain position of the unbounded prestress steel strand in a tensioning state, the steel strand in the tensioning state between the new anchorage device and the anchorage device to be dismounted is cut off, and the prestress loss of the steel strand is small by being measured through an experiment. In addition, the method is simple in operation, the anchorage device is simple and practical, and good actual application value is achieved.
Description
technical field [0001] The invention belongs to the technical field of mechanical anchor research, in particular to a method for developing a prestressed steel strand open anchor. Background technique [0002] For the unbonded prestressed steel strand in working state, due to the need of engineering transformation, it is necessary to remove the engineering at one end of the steel strand without affecting the prestressing effect of the remaining part, so this anchor is specially developed. In order to remove the anchor at one end, it is necessary to install a new anchor at a certain position of the unbonded prestressed steel strand in tension. During the construction process, the prestress loss of the steel strand should be minimized as far as possible. This is specially developed. Open type steel strand anchor. Contents of the invention [0003] The purpose of the embodiment of the present invention is to provide a method for developing a prestressed steel strand open anc...
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IPC IPC(8): G01M13/00
Inventor 陈伯望沈蒲生胡习兵胡谷旺周建发
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY