FIELD: construction, particularly engineering investigations used in rapid building erection and reconstruction.
SUBSTANCE: method involves driving screw-in punch made as a blade in soil with the use of boring rig up to reaching soil test level simultaneously with driving screw-in anchor in soil, wherein screw-in punch and anchor are mounted on lower end of hollow pipe string so that they may perform limited movement one relative another and relative the pipe string with upper pipe string end secured to soil; applying predetermined load value to the punch; measuring punch immersion value at predetermined time intervals up to soil settlement stabilizing under the punch; applying next load value. Load application and measuring, as well as punch immersion method is performed in direct contact with punch of load applying device and linear displacement transducers with the use of feedback link connected with day ground. Load is applied to punch from day ground through technological hollow rod passing through pipe string hollow before test start. The rod is provided with load transducer cooperating with the punch and linear displacement transducers cooperating with the anchor. The anchor is used as reference point. Soil is tested in mode of set soil displacement under the punch by conditionally momentary deforming of soil under the punch in steps equal for soil to be tested. On reaching deformation step total load applied to punch and additional punch immersion are measured at predetermined time intervals. On reaching conditional load stabilizing on one step one will shift to the next step of soil deforming. Rate of change of specific pressure applied to soil with time is used as criterion of conventional load stabilizing on each step.
EFFECT: possibility to measure load applied to operating member and immersion thereof near soil test level, reduced test time.
5 cl, 4 dwg
