Subsidence of Existing Buildings from the Impact of New Construction

Abstract

The article describes the methodology and results of geodetic observations of additional subsidence of two residential buildings with strip foundations on moist loess soil. Next to them, a pit was dug for the new building, which was deeper than the level of the soles of these foundations. The authors proved that of arranging the pit fence ensured the fulfillment of regulatory requirements for not exceeding the maximum allowable values of foundations of existing buildings by additional subsidence. The technology provided for the construction of a pit enclosure with sheet piling (I-beam No. 30) with a step of 1 m, with timber lagging between them. At the same time, the phasing of soil extraction in the initial stages under the protection of a soil berm was maintained. Then they installed the capping beam, struts, rakers and gradually raised the floor and outer wall of the parking lot of the new building. Sufficient convergence of the simulation results in the plane condition using the finite element method and field studies was determined. An elastic-plastic soil model of the "basement - foundations of an existing building - pit enclosure" system was used for modeling.