METHOD FOR ERECTION OF FOUNDATION FOR BROADCASTING TOWER AND ARRANGEMENT OF BROADCASTING TOWER FOUNDATION Russian patent published in 2010 - IPC E02D27/42 

FIELD: construction.

SUBSTANCE: inventions relate to the field of foundation engineering of high-rise buildings, such as broadcasting tower. Method for erection of broadcasting tower foundation consists in detection of physical and mechanical characteristics of underlying foundation soil: angle φ of internal friction, c - specific adhesion and γ - density of structure under design compression load of foundation soil, E₀ - module of total deformation of foundation soil layers, µ₀ - Poisson coefficient of soil, selection of foundation shape in plane with area F rated by bearing capacity of foundation and providing for design moment against turnover. Foot of foundation circular in plane is shaped as convex and toroidal with radius of support contact surface with underlying foundation soil r_t., maximum angle is calculated using given dependences for elastic half-contact of cylindrical support surface of circular foundation with foundation soil, as well as pressure of foundation structural tensile strength, pressure in soil under centre of foundation ring support surface width in critical condition. Foot of foundation square or rectangular in plan is shaped as convex and spherical with radius of convexity of support contact surface with underlying foundation soil R_sph. Foundation pit is dug out with bottom that has response shape of erected convex foundation, curb is built with steel frame, curb is filled with concrete. Depth of maximum penetration of convex foundation into foundation soil is identified under circular cylinder and under sphere by given dependences at maximum pressure of elastic soil compression under circular cylinder and under sphere accordingly. Also arrangement of foundation for broadcasting tower is proposed.

EFFECT: increased bearing capacity and strength of foundation-base system.

2 cl, 7 dwg