Construction method for plugging end of prestress pilaster steel strand of concrete silo

Abstract

The invention provides a construction method for plugging the end of a prestress pilaster steel strand of a concrete silo. The pilaster is cast outside the silo wall; one end with the steel strand is connected with a prestress steel strand in the silo wall; during construction of a slip form, the pilaster is provided with a cavity so as to reserve and plug a groove; the other end, with a spiral tendon, of the steel strand extends out of the bottom surface of the groove of the cavity of the pilaster; after the concrete of the pilaster is solidified, the cavity is taken out; the end of the steel strand passes through an anchor device base plate which is pressed against the bottom surface of the groove, and is fixed by an anchor device; a prestress is tensioned to fix the pilaster and the silo wall through a connection tendon; and the groove is plugged by concrete. By the construction method, the concrete for plugging the integrated side surface pilaster is moved on the inner side of the pilaster under the condition of not influencing the requirement of the technology structure; during the construction of the slip form, the cavity is formed to reserve or plug the groove so that the anchor device base plate moves into the pilaster and the exposed length of the steel strand during installation is shortened; moreover, the construction is facilitated and the material is saved.

Description

Technical field: [0001] The invention relates to a construction method for plugging the end of a prestressed steel strand attached to a wall column in a concrete silo, which uses concrete to seal the end of the steel strand attached to a wall column. Background technique: [0002] Large-scale concrete silos, such as coal bunkers in coal mine coal washing plants, are unbonded prestressed silo projects. In order to increase its strength, it is necessary to set up pilasters outside the silo wall, and one end of the steel strand is connected to the prestressed silo wall The steel strand is connected, the other end of the steel strand has a spiral rib, and the end passes through the side of the column attached to the wall column, and the end passes through the anchor plate attached to the side of the column and is fixed with an anchor to realize the attachment The connecting rib between the pilaster and the warehouse wall is fixed. After the prestressed tension, it is necessary ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for plugging the end of the steel strand of the prestressed wall column of the concrete silo, which solves the defects that the method of adding a post-casting belt on the outside of the wall column is difficult to construct, labor-intensive and material-intensive

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