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- W645786778 abstract "IN THE UNITED STATES AND THE WEST EUROPEAN COUNTRIES VARIOUS INSTRUMENTS AND METHODS BASED ON PENETROMETERS OF RELATIVELY SMALL SIZE ARE USED FOR FIELD INVESTIGATIONS OF SOILS. IN THE USSR THERE ARE TWO METHODS OF SOIL INVESTIGATIONS UTILIZING PITS AND BORE HOLES. THE FIRST METHOD UTILIZES LOADING BY PRESSES AND PLATFORMS OF RELATIVELY LARGE SIZE, MANY EXCEEDING THE SIZE OF THE PENETROMETERS USED IN THE U.S. AND WESTERN EUROPE. IN THE SECOND METHOD, ESTABLISHMENT OF CARRYING CAPACITY OF SOILS IS CONDUCTED ON THE BASIS OF DEFINITE PHYSICAL AND MECHANICAL PROPERTIES OF SOILS OBTAINED FROM UNDISTURBED SAMPLES. FIELD LABORATORIES PERMIT ACCELERATED TESTS OF THE BUILDING PROPERTIES OF SOILS DIRECTLY ON SITE. THIS EQUIPMENT IS USED FOR: (1) SELECTION OF UNDISTURBED SOIL BLOCK SAMPLES OF NATURAL MOISTURE CONTENT FROM HOLES AND PITS, (2) DETERMINATION OF VARIOUS SOIL CHARACTERISTICS, (3) DETERMINATION OF THE COMPRESSIVE PROPERTIES BY THE USUAL OR ACCELERATED METHOD IN A CONSOLIDOMETER OR ANOTHER DEVICE BY MEANS OF WHICH PRESSURE IS APPLIED UNIFORMLY ON ALL SIDES OF THE BLOCK SAMPLE, (4) DETERMINATION OF THE STRUCTURAL PROPERTIES OF LOESS SOILS, THE COEFFICIENTS OF SETTLEMENT AFTER WETTING, AND THE SIZE OF POSSIBLE SETTLEMENTS AFTER WETTING, (5) FIELD INVESTIGATIONS OF THE SHEAR PROPERTIES OF SOILS, (6) DETERMINATION OF THE CRITICAL PRESSURE ON SOIL IN ACCORDANCE WITH THE CODES AND TECHNICAL REQUIREMENTS, AND (7) CALCULATION OF THE POSSIBLE SETTLEMENT OF THE FOOTINGS OF VARIOUS BUILDINGS AND STRUCTURES. A SPECIAL DEVICE IS DESCRIBED WHICH HAS BEEN DEVELOPED FOR SHEAR TESTS OF SOILS DIRECTLY ON SITE. IT IS OF THE SINGLE-SHEAR TYPE. ANOTHER DEVICE IS PRESENTED WHICH HAS BEEN DEVELOPED TO BE USED FOR ACCELERATED CONTROL OF THE QUALITY OF SOIL COMPACTION IN DIFFERENT EARTHWORKS. THE DEVICE PERMITS THE DETERMINATION OF VOLUME WEIGHT, MOISTURE CONTENT, POROSITY AND OTHER PHYSICAL SOIL CHARACTERISTICS WITHOUT PRELIMINARY DRYING OUT OF THE SAMPLE. IN ADDITION, THE DEVICE PERMITS THE SPECIFIC WEIGHT OF THE SOLID PHASE OF SOIL TO BE DETERMINED DIRECTL/ IN THE FIELD. THE OPERATION OF THE DEVICE IS BASED ON THE HYDROSTATICAL WEIGHING OF SOIL SAMPLES IN WATER. A SET OF VIBRATIONAL EQUIPMENT HAS BEEN DEVELOPED FOR ACCELERATED AND DYNAMICAL INVESTIGATIONS OF SOILS. IT CAN BE USED FOR THE DETERMINATION OF THE COMPRESSIVE PROPERTIES, SHEAR STRENGTH AND DENSITY. THE MAIN PART OF THE EQUIPMENT IS A HIGH- FREQUENCY VIBRATOR MOUNTED ON THE LOADING LEVER OF THE COMPRESSION DEVICE. THROUGH THE LOADING LEVER VIBRATIONS OF GIVEN DIRECTION, FREQUENCY AND AMPLITUDE ARE INDUCED BY THE VIBRATOR IN THE LOADED MEMBER." @default.
- W645786778 created "2016-06-24" @default.
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- W645786778 date "1960-01-01" @default.
- W645786778 modified "2023-09-26" @default.
- W645786778 title "EQUIPMENT FOR FIELD GEOTECHNIC INVESTIGATION OF SOILS" @default.
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