A pull-up device for a dowel rod of a screw load tester

Abstract

The invention discloses a dowel bar pulling device for a spiral plate load tester. Dowel bars are connected through dowel bar joints; a left lifting track, a right lifting track, a lifting frame and a pulling arm are mounted below a base; the left lifting track and the right lifting track are made of channel steels which have opposite openings and are parallel to each other, and are vertically connected to the base; the two lifting tracks are connected through a top beam; the pulling arm is fixed on the lifting frame; an upper pulley and a steel wire rope anchoring lug are mounted below the top beam; a lower pulley is mounted at the upper part of the lifting frame; a steel wire rope winch is mounted at the middle part of each lifting rail; a crank handle is mounted on the steel wire rope winch; one end of a steel wire rope is fixed on the steel wire rope anchoring lug, and the other end bypasses the lower pulley and the upper pulley in sequence and then is wound on the steel wire rope winch. The device solves the problem that time and labor are wasted because the dowel bars of the spiral plate load tester are pulled manually, ensures that the dowel bars of the spiral plate load tester are pulled out with less time and labor, is simple in structure, improves the testing efficiency and is suitable for pulling out a penetration rod in static penetration test.

Description

technical field [0001] The invention relates to the field of geotechnical tests, and more particularly to a dowel rod pulling device for a spiral plate load tester, which can quickly and conveniently pull out the dowel rod from the ground after the spiral plate load test is completed. Background technique [0002] The spiral plate load test is evolved from the conventional plate load test in the past 30 years, and is currently the most widely used in-situ test technique. Spiral plate load test is to rotate a spiral pressure-bearing plate (hereinafter referred to as the spiral plate) to a predetermined test depth below the ground by manpower or mechanical force, apply load to the spiral plate through the dowel bar, and connect the lower end of the dowel bar with the spiral plate. The resistance strain sensor connected to the plate measures the load borne by the spiral plate, and the corresponding deformation of the spiral plate under different loads is measured and read by ob...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a device for pulling out a dowel bar of a screw load tester, which has a simple structure and is easy to use. Pulling out is convenient and labor-saving and improves test efficiency. It solves the time-consuming and labor-intensive problem of pulling out the dowel bar of the spiral plate load tester by manpower, and can pull out the dowel bar conveniently and quickly, which improves the test efficiency; Lifting and Pulling of the Penetration Rod in the Static Penetration Test

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