A testing device and testing method for tangential frost heaving force of pile foundation

Abstract

The application discloses a testing device and a testing method for tangential frost heaving force of a pile foundation. The device comprises an open-ended test box, M frost heaving force testing units and N counterforce units. The inside of the test box is longitudinally divided into M spaces, and the M spaces comprise K total strain spaces and N temperature strain spaces. The M frost heaving force testing units are respectively arranged in the M spaces. Each frost heaving force testing unit comprises a test pile arranged to protrude from a soil layer in a corresponding space. Each frost heaving force testing unit is used to test the strain of the test pile in the corresponding total strain space and temperature strain space. Each counterforce unit is connected with the upper surface of the soil layer in the temperature strain space and the protruding end of the test pile, and is used to prevent the frost heaving deformation of the test pile and the soil layer around the test pile, so that the test pile and the soil layer around the test pile in the temperature strain space remain in place. The frost heaving force testing unit and the counterforce unit are used to separate the temperature strain and the frost heaving strain of the test pile, and the tangential frost heaving force is obtained. The measurement result is accurate and the operation is simple.

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