ASSESSMENT OF SEPARATING BARRIERS IN WEAK CLAY SOILS, ARRANGED TO PROTECT THE EXISTING BUILDINGS FROM IMPACT OF THE NEW CONSTRUCTION

strip foundation of the existing building, adjacent slab foundation, strip foundation increment of settlement, metal sheet piling, geotechnical barrier, the weak clay base In the Kuban State Agrarian University are conducted a study on assessment of works of separating barriers in weak clay soils, arranged to protect the existing buildings on the impact of the new building. To reduce the development of additional settlement strip foundations of the existing building on the influence of pressure, transmitted to the ground situated close to the new slab foundation, considered two options for separating barriers. In first variant separating barrier made of a metal sheet pile Larsen. Under the terms of the task are believed that the metal sheet piling dipped into the ground indentation (or vibro) to excavation opening a new building. Sheet piling length is assigned by calculation or constructively, often under the assumption that the entire thickness cutting through weak clay soils. It was found that the best results are achieved in the metal sheet pile when it based in the lower end of the ground low compressibility. In a second embodiment of separating barrier made of geotechnical (grouting) barriers. Under the terms of the task is believed that prior to the start of major construction works originally produced by cementation of soil injectors (soil preparation), in which filled all the cavities, cracks, zones of low density at the bottom. Thus, there is a compaction and reinforcement of soil lenses cement grout and create a more rigid structure that can respond to a further injection of an injectable solution. According to the results of the calculations and modeling determined that the greatest positive effect on the separating wall foundations is achieved when it is arranged as a geotechnical barrier. Additional settlement strip foundation of an existing building has decreased to 60–65 % (about 4,2 cm) as compared with 8,5 cm additional settlement, which will be in the absence of separating barrier. If the separating barriers between the foundation of the building is used a metal sheet piling Larsen, an additional strip foundation settlement will also be reduced, but only by 20–25 % and will amount to about 6,8 cm.