METHOD OF INTENSE SOIL STRENGTHENING UNDER EXISTING BUILDING Russian patent published in 2014 - IPC E02D3/12 

FIELD: construction.

SUBSTANCE: method of intense soil strengthening under an existing building includes formation of a peripheral row in the zone of performance of restoration works along the perimetre of a strengthened base of sagging soil and cellular structure in the zone of the strengthened base of the soil by drilling of depth wells to the depth of sagging soil, filling of injectors into wells, their sealing and injection of a hardening mortar under pressure in a certain sequence of sagging horizon strengthening. Relative to the structure contour they create a process base zone of multi-level support horizons of a counterforce body, in which at the bottom they form a root of stabilisation of sagging soil by the method of forced main and additional stage-step injection of an active mass of the mortar, distribution and regulation of sagging soil in volume density at joints of sections of the contact and combination of complect-active heterogeneous systems, direct and reverse pressing of a zone of relaxation sections in volume density of sagging soil at joints of contact sections under alternating directivity of supply of an active mass of mortar at variable angles in horizontal planes of multi-level support horizons. Intensive development is created to move mortar through soil by forced and transverse shift forces relative to each other in different levels of horizons of a counterforce body in direction of counteraction of strengthened soil resistance forces. Locations of nodal directivity of mortar injection into soil are distributed and formed with possible correction of required linear and angular parameters of directivity of reciprocal displacement of the mortar, consolidation and formation of the soil structure. Injection of the mortar into shafts of depth wells is carried out in steps by horizons and formation into a single volume-space structure of soil to the entire depth of the active base zone of relaxation sections of the counterforce body. Introduction of an additional injection of mortar and creation of a retaining force is carried out in the form of supply of a by-mortar and serial selective direction, distribution and formation of its position at local sections of horizontal transitions of basic zones of relaxation sections of the counterforce body in the sagging soil under the existing building.

EFFECT: higher intensification and efficiency of soil strengthening under an existing residential building.

5 cl, 5 dwg