| 摘要 |
FIELD: construction. ^ SUBSTANCE: invention relates to foundation construction technologies, and particularly, to reinforcing technology used for compressible foundation sections of detached or standard foundations in buildings and structures being erected under severe engineering and geological and hydro-geological conditions. Method of foundation bed construction by horizontal reinforcing with solid concrete components includes foundation pit mining and installation of horizontal stiff lengthy elements such as crossties. As soon as the foundation pit is developed to the designed depth, which is equal to the sum of foundation bed depth of installation and buffer layer thickness, and is bladed, foundation pit bottom is leveled. After that, foundation axes are broken down and longitudinal axes of future solid crossties are broken down against the established construction layout of the longitudinal axes of future solid crossties regarding foundation axes. The chaps for solid crossties are made mechanically or manually on foundation pit bottom along the marked longitudinal axis of the future solid crossties. Besides, the chap depth is equal to the cross section of the future solid crosstie. The chap bottom is cleaned and reinforced frameworks are laid down in the chaps. The chaps are then cemented together with the reinforced frameworks by means of concrete mix B15 with further compacting. To install horizontal reinforced solid elements in the chaps such as solid crossties are located on the foundation pit level. So, the crosstie distributing element is formed in the compressible section of the built structure foundation bed. In addition, the length of each solid crosstie must not exceed the distance between the external shapes of the utmost foundation edges of the building. The chaps for solid crossties installation are made in parallel to each other and at design distance from each other so that the area of crosstie distributing element overlaps foundations area completely. As soon as the concrete mix in the chaps will achieve the strength no less than 50% from the design strength, the buffer layer is laid down, leveled and compacted. The buffer layer is laid down to the level of built structure foundation bed. The buffer layer consists of sand, crushed stone from solid rocks or crushed stone from ferrous metallurgy wastes. The buffer layer thickness must not be less than 1/3 of solid crosstie width or cross section diameter. The maximum size of crushed stones must not exceed 1/5 solid crosstie width or cross section diameter. ^ EFFECT: improvement of soft ground foundations bearing capacity and reduction of material consumption. ^ 4 dwg |
