Causes and treatment measures for deformation of retaining soil and slope

Abstract

To explore reasons for deformation of retaining soil and slope in the Maternal-Child Health Care Hospital of Hanyuan County, the meteorology, geological lithology, geological structure, and hydrological conditions were surveyed. Moreover, types and distributions of weak intercalated layers were found out by drilling, and physical and mechanical properties were obtained through physical mechanics and field shear test. Meanwhile, by means of drilling and monitoring, deformation range and characteristics of retaining soil and slope were determined, and deformation mechanism was obtained through monitoring crack opening and deep displacement. The structures showed that deformation occurred at new 2# counterweight retaining wall is caused by shallow slip control surface RJ0; the pulling and crack of settlement joints between the new 2# counterweight retaining wall and the new 1# slab-pile wall are caused by the deformation of shallow slip control surface RJ0; the deformation and failure of new 2# counterweight retaining wall and new 1# slab-pile wall and their foundation rock mass at the lower part are caused by creep displacement of “shallow weak intercalated layers” RJ0 and RJ1; in addition, the deep creep control surface RJ2 has certain influence on the deformation of upper building and its foundation rock mass. Therefore, anti-slide piles should be used to control the shallow slipping control surface RJ1, with the depth reaching the structural plane where the deep creep control surface RJ2 is located.