METHOD OF CORRECTION OF SUBSIDENCE TROUGH AT ERECTION OF UNDERGROUND STRUCTURE BY CLOSED METHOD IN WEAK SOILS Russian patent published in 2020 - IPC E02D31/08 

FIELD: construction.

SUBSTANCE: invention relates to construction and construction of buried structures, for example, tunnels and subway stations. Method of correction of subsidence trough at erection of underground structure by closed method in weak soils includes drilling of wells and initial creation of pre-fixed stabilizing layers of rock massif between foundation of building and area of arrangement of underground structure erected with the help of underground tunneling, with formation of alternating fixed stabilizing layers and loose extensible layers of rock mass. Further, the hardening solution is injected into loose expandable layers of the rock mass, located between the foundation of the building, fixed with stabilizing layers and erected underground structure, which is carried out during erection of the underground structure, taking into account the development of subsidence trough. In unfilled expanded layers of rock mass before construction of underground structure sensors are installed to measure parameters of stresses and deformations in rock mass, for this purpose additional wells are drilled for installation of sensors. Parameters are measured prior to driving an underground mine by erection of an underground structure and when they are changed during underground drilling, a hardening solution is injected into these layers until the values of stress and strain parameters in the rock massif between the foundation of the building and area of underground structure location, determined before underground tunneling.

EFFECT: technical result consists in improvement of accuracy of time of beginning and completion of works on injection of hardening solution and reduction of volumes of consumed materials for elimination of deformation of soil under foundations of buildings and structures at underground driving during construction, for example, tunnel of underground.

1 cl, 2 dwg