DEVICE FOR DETERMINING TOTAL FRICTION AND COHESION FORCES ON SIDE SURFACE OF BURIED MONOLITHIC FOUNDATION Russian patent published in 2024 - IPC E02D1/00 

FIELD: construction.

SUBSTANCE: invention relates to engineering tests in the design and construction of monolithic buried foundations, made in soil without formwork, for example, bored piles, wall in soil, slotted foundations and others. Device for determination of total forces of friction and adhesion along side surface of buried monolithic foundation by testing of cylindrical concrete samples. It contains at least two metal pipes installed in the well, telescopically inserted into each other, equipped with metal support discs, rigidly attached to embedded parts and metal pipes. All metal support discs, except for the lower one, have holes for supplying concrete to the well area for making cylindrical test concrete samples on them, diameter of metal support discs is equal to diameter of well, and embedded parts are made so that they are located in produced cylindrical test concrete samples. Each metal pipe corresponds in height to the tested concrete samples. Lower metal support disk, rigidly attached to the metal pipe, is installed along the vertical axis inside the well with a given gap from the well bottom, due to vertical displacement of the manufactured test specimen during its breakdown. Above the tested concrete samples with a gap on the supports, a cargo platform is installed, designed to accommodate a load-stop, and in the gap between the tested samples and the cargo platform there is a jack with a pressure gauge, made with possibility of successive creation of loads on tested cylindrical concrete samples through telescopically inserted into each other metal pipes, which are made with possibility of determination of friction and adhesion forces along side surface of tested cylindrical samples.

EFFECT: higher information value of force of friction and soil cohesion along the monolithic buried foundation side surface, due to the design of the device, which is aimed at separate determination of total friction and cohesion forces of all engineering-geological elements lying within the height of the monolithic foundation.

1 cl, 4 dwg